FEASIBILITY METALLURGICAL TESTING GOLIATH GOLD PROJECT TREASURY METALS INCORPORATED KM3406. September 4, 2012

Transcription

1 FEASIBILITY METALLURGICAL TESTING GOLIATH GOLD PROJECT TREASURY METALS INCORPORATED KM346 September 4, 212 ISO 91:28 Certificate No. FS 6317 ALS Metallurgy G&T METALLURGICAL SERVICES ADDRESS 2957 Bowers Place, Kamloops, BC V1S 1W5 PHONE FAX ALS CANADA LTD Part of the ALS Group A Campbell Brothers Limited Company

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3 1 1. Introduction Treasury Metals Incorporated is currently investigating the technical and economic feasibility of its flagship project; Goliath Gold Project, located near Dryden, Ontario, Canada. The company reports that the project is an advanced stage, high grade gold deposit with an NI compliant resource of over one million ounces of gold. They note the potential also exists for additional silver, lead, and zinc credits. Mr. John Wells, Metallurgical Consultant, contacted G&T Metallurgical Services on behalf of Treasury Metals Incorporated and requested a proposal to carry out metallurgical testing on a master composite sample and several variability composite samples from the property. A proposal was sent to Mr. Wells via e- mail on April 4, 212, and upon some minor revision, the proposal was accepted. The main objectives of this test program can be summarized by the following points: Determine the chemical content, comminution properties, and gold occurrences and associations for the master composites. Determine gold metallurgical response using either a gravity/cyanidation or direct cyanidation flowsheet. Carry out optimization testing using the flowsheet that produces the most favourable gold metallurgical performance. The variability composites will be subject to Bond ball mill work index determinations and cyanidation at the optimized conditions.

4 2 The samples were received at G&T Metallurgical Services on April 24, 212. The samples were received in the form of half diamond drill core. One hundred and sixty three (163) discrete samples were included in the shipment. The estimated shipment weight was kilograms *. A specific mass from each sample was combined to generate Master Composite 2. Prior to the reporting of the gold head grades, initial comminution and metallurgical test work was conducted on Master Composite 2. The reported gold head grades from this composite were higher than expected. In order to dilute Master Composite 2, the samples from each of TL82, TL197, and TL11178, with the exception of 5 kilograms from each of the TL composites, were combined with Master Composite 2 to generate Master Composite 3, on which the remaining test work was conducted **. The test work program began in May 212 and the program concluded in August 212. The main findings from this test program are presented in the body of this report. Individual test results along with supporting data may be found in any one of the following appendices, which are presented as follows: Appendix I Sample Origin Appendix II Metallurgical Test Data Appendix III Particle Sizing Data Appendix IV Comminution Data Appendix V Special Data Appendix VI ADIS Analysis Data * Details of samples received and composite construction are provided in Appendix I. ** Master Composite 1 was generated in previous program KM296 Pre-Feasibility Metallurgical Testing - Goliath Gold Project June 211.

5 3 2. Properties of the Ore Sample properties, such as chemical and mineral contents, and comminution (crushing/grindability) play an important role in process flowsheet development. These properties for the Goliath Gold composites are discussed in more detail in the following sub-sections. 2.1 Chemical Content The chemical content data was determined using standard analytical techniques. The chemical content data for the two master composites is presented in Table 1. The gold content in the feed for Master Composite 2 was estimated at 5.9 g/tonne. This was higher than anticipated, therefore, Master Composite 3 was generated, which had a gold content of about 2.2 g/tonne. The gold content of the variability composites ranged from about.4 to 15.4 g/tonne. This data is displayed in Table 2.

6 4 TABLE 1 CHEMICAL CONTENT DATA MASTER COMPOSITES Sample Name Element for Assay percent or g/tonne Ag As S S(s) C TOC Hg Sb Au Master Composite Master Composite Notes: a) Au, Ag and Hg assays are reported in g/tonne, all others are reported in percent. b) S(s) sulphide sulphur, TOC total organic carbon. c) Details can be seen in Appendix V. TABLE 2 GOLD CONTENT DATA VARIABILITY COMPOSITES Sample Name Au g/tonne Variability Composite Variability Composite 2.84 Variability Composite Variability Composite Variability Composite Variability Composite 6.71 Variability Composite Variability Composite Variability Composite 9.37 Variability Composite Note: Details can be seen in Appendix V.

7 5 2.2 Mineral Content A sub-sample of Master Composites 2 and 3 were subjected to gravity separation via Knelson concentrator. The gravity concentrate was submitted for Automated Digital Imaging System (ADIS) to determine the gold occurrences and their associations. A summary of the results can be seen in Table 3. TABLE 3 DISTRIBUTION OF GOLD MASS BY CLASS OF ASSOCIATION Gravity Concentrate Sample Lib Locked in Binary With: Cs Ga Sp Py Po He Gn MP Test 1 Master Composite < < Test 6 Master Composite < Notes: a) Lib-Liberated, Cs-Copper sulphides, Ga-Galena, Sp-Sphalerite, Py-Pyrite, Po-Pyrrhotite, He-Hematite, Gn-Gangue, MP-Multiphase. b) See Appendix VI for additional test data. Of the observed gold particles in the gravity concentrate, 72 and 42 percent of the gold mass was considered liberated for Master Composites 2 and 3, respectively. The majority of the remaining gold mass observed in Master Composite 2 was associated with pyrite. The majority of the remaining gold mass observed in Master Composite 3 split fairly evenly between gangue and multi-phase. The majority of the minerals observed within the multi-phase particles were either mainly gold with some pyrite, or mainly pyrite with some gold.

8 6 PHOTOMICROGRAPH 1 GOLIATH GOLD KNELSON CONCENTRATE OF MASTER COMPOSITE 3 Test 6 KM346 Particle 1 Gn Cp Gn Au Py Py Particle 6 Au *Au-Gold, Cp-Chalcopyrite, Py-Pyrite, Gn-Gangue

9 7 2.3 Comminution Test Work Crushing and grinding parameters were measured using the SMC test and the Bond ball mill work index test. The results are displayed in Tables 4 and 5. The following observations were noted when reviewing these results: SAG Mill Comminution (SMC) test data was generated for Master Composite 2 *. On the basis of the SMC test data, Master Composite 2 can be considered to be of medium hardness with respect to breakage in a SAG mill. The A*b parameter, a measure of resistance to impact breakage in the SAG mill, was 5.. The Bond ball mill work index measured 1.8 kwh/tonne for Master Composite 2. On the basis of this result the composite would be considered to be medium with respect to energy requirements for breakage in a ball mill. The Bond ball mill work index of the variability composites ranged between 8.9 and 13.9 kwh/tonne. On the basis of these results, the tested samples range in hardness from soft to moderate. * The complete JKTech report on the SMC Tests is provided in Appendix IV-Comminution.

10 8 TABLE 4 COMMINUTION SAG MILL TEST DATA Sample A*b Value Category Rank Percent Master Composite 2 5. Medium Note: The complete JKTech report on the SMC tests is provided in Appendix IV-Comminution. TABLE 5 BOND BALL MILL WORK INDEX Sample kwh/tonne Master Composite Variability Composite Variability Composite Variability Composite Variability Composite Variability Composite Variability Composite1 9.2 Note: The standard F.C. Bond ball mill work index test is done using a closing sieve size of 16 m K 8.

11 9 3. Metallurgical Test Results Two principal flowsheets were evaluated in the current test program. The flowsheets combined unit operations that involved gravity concentration and cyanidation. One flowsheet was tested including gravity separation, whilst the second flowsheet was tested without gravity separation. Upon selection of the flowsheet, primary grind size, sodium cyanide concentration, and dissolved oxygen levels were assessed to determine the impact on gold extraction. 3.1 The Flowsheets The flowsheets used in this test program are presented in Figure 1. A summary of the key features of the flowsheet and the principal test conditions are discussed further below: The primary grind sizing, for Flowsheet 1, varied between 6 to 147 m K 8. The gravity concentrate was subjected to intensive cyanidation. The intensive leach residue was combined with the gravity tailing for further cyanidation. Once the primary grind sizing was established, additional tests were carried out at variable sodium cyanide concentrations ranging from 25 to 2, ppm. The ph in the cyanidation circuit was maintained at 11.. At the conclusion of the tests, an additional test was conducted without oxygen sparging using client selected conditions. For Flowsheet 2, the primary grind sizing was maintained at 94 m K 8. The whole-of-ore feed sample was subjected to cyanidation using a sodium cyanide concentration of 1, ppm. The ph in the cyanidation circuit was maintained at 11..

12 1 FIGURE 1 FLOWSHEET AND TEST CONDITIONS Gravity plus Cyanidation Flowsheet 1 (Tests 2 to 4, 7 to 28) Feed Knelson Concentrator Knelson Tail ph µm K 8 24 hr Intensive Leach Liquor Intensive Leach Residue 2 hr 6 hr 24 hr 48 hr Test Conditions Cyanidation Tailings Gravity Concentrate Leach Gravity Tailing Leach 24 hours 48 hours ~1% solids ~4% solids 5g/L NaCN.25-2.g/L NaCN 2g/L LeachAid Oxygen/Air ph 12 ph 11 Whole-of-Ore Direct Cyanidation Flowsheet 2 (Tests 3 and 5) Feed ph µm K 8 2 hr 6 hr 24 hr 48 hr Cyanidation Tailings Test Conditions Whole-of-Ore Leach 48 hours ~4% solids 1.g/L NaCN Oxygen ph 11

13 Master Composite Test Results Metallurgical testing focused on assessment of two flowsheets, featuring gravity concentration and cyanidation unit operations and optimization of the selected flowsheet. The results of the tests are presented in summary format in Figure 2 *. The presented data is further discussed as follows: The initial two tests indicated the gravity recoverable gold content of the feed was between 69 and 72 percent. The gravity/cyanidation flowsheet versus the direct whole-of-ore cyanidation flowsheet reported overall gold extraction of 96 and 95 percent, respectively. The client instructed the inclusion of gravity separation stage for remaining test work. Grind size optimization was conducted over grind sizes of between of 6 to 147µm K 8. Overall gold extractions were about 95 percent. The client selected a primary grind size of 94µm K 8 for the cyanide concentration optimization tests. The sodium cyanide concentrations were varied between 25 and 2, ppm. Overall gold extractions were between 93 and 96 percent. The client selected a concentration of 1, ppm for the remainder of the work. A final test was conducted where the sparging gas was changed from oxygen to air. The overall gold extraction was 97 percent. This slightly higher result may be due to the higher gravity gold content that was observed for this test. Air sparging was selected for the variability tests. In general, leach kinetics were rapid with the bulk of the gold in the gravity tailings solubilized within two to six hours. * See Appendix II for detailed test results.

14 12 Sample ID FIGURE 2 METALLURGICAL TEST RESULTS Primary NaCN Gold Extraction* Reagent Sparging Test Grind Conc. Gravity CN Soln. 48 Hr CN Soln. Overall Cons.kg/t Gas µm K 8 ppm Au (%) Au (%) Au (%) NaCN Lime MC Oxygen MC Oxygen MC Oxygen MC Oxygen MC Oxygen MC Oxygen MC Oxygen MC Oxygen MC Oxygen MC Oxygen MC Oxygen MC Air * with respect to gravity feed 1 Gold Extraction Leach Kinetics Gold Extraction (percent) Test 2- Gravity PG= 114 µm K8 Test 3- Direct PG= 114 µm K8 Test 4- Gravity PG= 94 µm K8 Test 5- Direct PG= 94 µm K8 Test 7- Gravity PG= 147 µm K8 Test 8- Gravity PG= 73 µm K8 Test 9- Gravity PG= 6 µm K8 Test 1- Gravity PG= 94 µm K8 NaCN 2ppm Test 11- Gravity PG= 94 µm K8 NaCN 75ppm Test 12- Gravity PG= 94 µm K8 NaCN 5ppm Test 13- Gravity PG= 94 µm K8 NaCN 25ppm Test 14- Gravity PG= 94 µm K8 NaCN 1ppm Air Sparge Time (Hours)

15 Variability Composite Test Results At the conclusion of the master composite test work, the selected variability composites were subjected to gravity separation and cyanidation at the client selected optimized conditions. The results are summarized in Table 6. TABLE 6 VARIABILTY COMPOSITE GOLD EXTRACTION RESULTS Sample ID Test Primary Grind µm K 8 NaCN Conc. ppm Sparging Gas Gravity CN Soln. Gold Extraction* 48 Hr CN Soln. Overall Reagent Cons. kg/t Au (%) Au (%) Au (%) NaCN Lime Var Air Var Air Var Air Var Air Var Air Var Air Var Air Var Air Var Air Note: Detailed results can be seen in Appendix II. The overall gold extraction varied between 92 and 99 percent. A significant amount of gold in the feed reported to the gravity concentrate; between 66 and 95 percent. The leach kinetics of the gravity tailings were rapid, with the majority of the gold being solubilized within two to six hours. Reagent consumptions were typically low, on average,.7 and.4 kg/tonne for sodium cyanide and lime, respectively.

16 14 PHOTOMICROGRAPH 2 GOLIATH GOLD KNELSON CONCENTRATE OF MASTER COMPOSITE 2 Test 1 KM346 Particle 3 Gn Gn Au Particle 8 Py Ga Au Gn Au Py *Au-Gold, Ga-Galena, Py-Pyrite, Gn-Gangue

17 15 4. Ancillary Testing 4.1 Flocculation and Settling Test Results Prior to the commencement of the settling tests, preliminary sighter tests were conducted to assess a range of flocculants. Master Composite 3 was used as the baseline for the flocculant screening tests. Results of the tests are displayed in Table 7 and Photo 3. TABLE 7 FLOCCULANT SCREENING TESTS Master Composite 3 Test Tube Flocculant Superfloc A13 Superfloc C-496 Magnafloc 333 Magnafloc 156 Dosage(g/t) Clarity Clear Clear Clear Clear PHOTO 3 FLOCCULANT SCREENING TESTS Master Composite 3 Test Tube 1 Test Tube 2 Test Tube 3 Test Tube 4

18 16 After the initial screening tests, the flocculant Superfloc C-496 showed the best performance. This flocculant was selected for subsequent settling tests. The resulting data is summarised in Table 8. TABLE 8 FLOCCULANT DOSAGE TESTS MASTER COMPOSITE 3 Superfloc C-496 Dosage g/tonne ph Initial Density % Solids Final Density % Solids Rate mm/min Notes: a) All tests performed in Kamloops tap water. b) Final density value taken at 24 hours. c) Settling rate measured during free settling only. d) Sample used for each composite was fresh feed ground to nominal 96µm K 8. e) Detailed test results can be found in Appendix V. The performance of the test indicated a settling velocity up to 114 mm per minute at a flocculant dosage rate of 2 g/tonne can be achieved. As the dosage of flocculant increased, the settling rate increased.

19 Rheology/Viscosity Test Results The viscosity properties of Master Composite 3 were tested using a Bholin Visco 88 viscometer. The results of the tests can be seen in Table 9. TABLE 9 RHEOLOGY/VISCOSITY TESTS Sample ph Master Composite Pulp Density % Solids Viscosity Shear Rate (sec -1 ) Low Low Low Low Low Low Low Low Low Notes: a) All tests performed in Kamloops tap water. b) Sample used for each composite was fresh feed ground to nominal 96µm K8. c) Detailed test results can be found in Appendix V. Slurry viscosity of less than 1cps at the shear rate of is considered acceptable for pumping applications. There may be some issues at the higher density of 6 percent solids. Viscosity modifying agents may be required at that density. Slurry viscosity of less than 3,5 cps at the shear rate of considered acceptable for mixing and screening applications. is 4.3 External Vendor Testing A 16 kilogram sample of Master Composite 3 was subjected to the optimized leach conditions. The resulting filtrate and filter cake were packaged and sent to EcoMetrix Incorporated. The findings from their test work will be issued independently of this report.

20 5. Conclusions and Recommendations 18 A feasibility metallurgical test program has been completed on a master composite and several variability composite samples from the Goliath Gold Project. Master Composite 3 had a measured gold feed grade of about 2.2 g/tonne. The gold content of the variability composites ranged from about.4 to 15.4 g/tonne. About 42 percent of the gold mass observed in the Master Composite 3 gravity concentrate was liberated. The majority of the remaining gold mass observed in Master Composite 3 split fairly evenly between gangue and multi-phase. The majority of the minerals observed within the multi-phase particles were either mainly gold with some pyrite, or mainly pyrite with some gold. SAG Mill Comminution (SMC) test data was generated for Master Composite 2. On the basis of the SMC test data, Master Composite 2 can be considered to be of medium hardness with respect to breakage in a SAG mill. The A*b parameter, a measure of resistance to impact breakage in the SAG mill, was 5.. The Bond ball mill work index measured 1.8 kwh/tonne for Master Composite 2. On the basis of this result, the composite would be considered to be medium with respect to energy requirements for breakage in a ball mill. The Bond ball mill work index of the variability composites ranged between 8.9 and 13.9 kwh/tonne. On the basis of these results, the tested samples range in hardness from soft to moderate. Two alternate process flowsheets were investigated for processing the Goliath sample. Gravity concentration cyanidation followed by cyanidation of the gravity circuit tailing was one option. The other utilized whole-of-ore direct cyanidation.

21 19 The gravity/cyanidation flowsheet was selected as the process flowsheet after initial comparison tests. Overall gold extraction ranged between 93 and 98 percent, with the majority of the gold in the gravity tailings solubilized within two to six hours. Grind size optimization, sodium cyanide concentration and sparging gas were all investigated with regards to the effect of gold extraction. The ultimate optimized conditions, as selected by the client, were a grind size of 94µm K 8, a sodium cyanide concentration of 1, ppm and using air as the sparging medium. The variability composites were subjected to these conditions. The overall gold extractions for the variability composites varied between 92 and 99 percent. A significant amount of gold in the feed was extracted by the gravity concentrate circuit, being between 66 and 95 percent. The leach kinetics of the gravity tailings were rapid, with the majority of the gold being solubilized within two to six hours. Reagent consumptions were typically low, being, on average,.7 and.4 kg/tonne for sodium cyanide and lime, respectively. A scoping level settling test was completed on Master Composite 3. The performance of the test indicated a settling velocity up to 114 mm per minute at a flocculant dosage rate of 2 g/tonne can be achieved. As the dosage of flocculant increased, the settling rate increased. Additional settling tests will be required to confirm this number at the design stage for the project. Initial scoping rheology/viscosity test work indicated there may be some pumping issues at the higher density of 6 percent solids. Viscosity modifying agents may be required at that density. Further test work that should be considered, but not be limited to, including full gravity recoverable gold (GRG) investigation, carbon adsorption testing, and cyanide detoxification test work.

22 APPENDIX I KM346 SAMPLE ORIGIN

23 1 1. Sample Origin The samples used in this test program were received at G&T Metallurgical Services on April 24, 212. The samples received were in the form of half diamond drill core. A total of 163 discrete samples were received with a total estimated weight of kilograms. A specific mass from each sample was combined to generate Master Composite 2. Prior to the reporting of the gold head grades, initial comminution and metallurgical test work was conducted on Master Composite 2. The reported gold head grades from this composite were higher than expected. In order to dilute Master Composite 2 the samples from each of TL82, TL197, and TL11178 were combined into their respective composites. With the exception of 5 kilograms from each of the TL composites, these were combined with Master Composite 2 to generate Master Composite 3 *. After bulk sample preparation, sub-samples were taken for metallurgical testing. Ten variability composites were generated. These samples were used to assess the variation in recovery at the optimised conditions that could be expected across the project. The chemical contents of the composites were determined using standard analytical procedures. The results of these determinations are presented in Table I-1. A listing of samples received and their respective weights can be seen in Table I- 2. The composition of the Master Composites and Variability Composites can be seen in Table I-3. * Master Composite 1 was generated in previous program KM296 Pre-Feasibility Metallurgical Testing - Goliath Gold Project June 211.

24 2 Sample Name TABLE I-1 CHEMICAL CONTENT DATA Element for Assay percent or g/tonne Ag As S S(s) C TOC Hg Sb Au Master Composite Master Composite Variability Composite 1 TL Variability Composite 2 TL Variability Composite 3 TL Variability Composite 4 TL Variability Composite 5 TL Variability Composite 6 TL Variability Composite 7 TL Variability Composite 8 TL Variability Composite 9 TL Variability Composite 1 TL Notes: a) Au, Ag and Hg assays are reported in g/tonne, all others are reported in percent. b) S(s) sulphide sulphur, TOC total organic carbon.

25 3 TABLE I-2A SAMPLES RECEIVED - AUGUST 24, 212 Sample ID Weight (kg) Form TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core

26 4 TABLE I-2B SAMPLES RECEIVED - AUGUST 24, 212 Sample ID Weight (kg) Form TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Dup Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core

27 5 TABLE I-2C SAMPLES RECEIVED - AUGUST 24, 212 Sample ID Weight (kg) Form TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL standard Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Dup Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core

28 6 TABLE I-2D SAMPLES RECEIVED - AUGUST 24, 212 Sample ID Weight (kg) Form TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Dup Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Standard Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Dup Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Half Core TL Dup Half Core TL Half Core Total 398.5

29 7 TABLE I-3A COMPOSITE CONSTRUCTION Master Composite 2 Sample ID Sample ID Weight (kg) Weight (kg) TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL Dup. TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL

30 8 TABLE I-3A Continued COMPOSITE CONSTRUCTION Master Composite 2 Sample ID Weight (kg) Sample ID Weight (kg) TL TL TL TL TL TL TL TL TL TL TL TL TL standard. TL TL TL TL TL Dup. TL TL TL TL TL TL TL TL TL TL Standard. TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL Dup. TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL TL Dup. TL TL TL Dup. TL TL TL Total 93.15

31 9 TABLE I-3B COMPOSITE CONSTRUCTION Master Composite 3 Sample ID Weight (kg) Master Composite TL TL TL Total 119.2

32 1 TABLE I-3C COMPOSITE CONSTRUCTION Variability Composite 1 Sample ID Weight (kg) TL TL TL TL TL TL TL TL TL TL TL TL Total 18.6 Variability Composite 2 Sample ID Weight (kg) TL TL TL TL TL TL Total 7.3

33 11 TABLE I-3C Continued COMPOSITE CONSTRUCTION Variability Composite 3 Sample ID Weight (kg) TL TL TL TL TL TL TL TL TL TL TL TL TL Total 12.3 Variability Composite 4 Sample ID Weight (kg) TL TL TL TL Dup. TL TL TL TL Total 15.55

34 12 TABLE I-3C Continued COMPOSITE CONSTRUCTION Variability Composite 5 Sample ID Weight (kg) TL TL TL TL TL TL TL TL TL TL TL TL TL Total 34.9 Variability Composite 6 Sample ID Weight (kg) TL TL TL TL TL TL TL TL TL TL Total 21.9

35 13 TABLE I-3C Continued COMPOSITE CONSTRUCTION Variability Composite 7 Sample ID Weight (kg) TL TL TL TL TL TL TL Dup. TL TL TL TL TL TL TL TL TL TL Total 34.1 Variability Composite 8 Sample ID Weight (kg) TL TL Dup. TL TL TL TL TL Standard. TL TL TL Total 11.7

36 14 TABLE I-3C Continued COMPOSITE CONSTRUCTION Variability Composite 9 Sample ID Weight (kg) TL TL TL TL TL TL TL Total 13.4 Variability Composite 1 Sample ID Weight (kg) TL TL TL TL TL TL TL Dup. TL Total 11.7

37 APPENDIX II KM346 METALLURGICAL TEST DATA

38 INDEX TEST PAGE 1 Gravity Test Master Composite 2 1 2A Gravity/Cyanidation Test Master Composite 2 3 2B Cyanidation Test Test 2A Combined Knelson and Cyanide Tailings 4 3 Cyanidation Test Master Composite 2 6 4A Gravity/Cyanidation Test Master Composite 3 8 4B Cyanidation Test Test 4A Combined Knelson and Cyanide Tailings 9 5 Cyanidation Test Master Composite Gravity Test Master Composite A Gravity/Cyanidation Test Master Composite B Cyanidation Test Test 7A Combined Knelson and Cyanide Tailings 16 8A Gravity/Cyanidation Test Master Composite B Cyanidation Test Test 8A Combined Knelson and Cyanide Tailings 19 9A Gravity/Cyanidation Test Master Composite B Cyanidation Test Test 9a Combined Knelson and Cyanide Tailings 22 1A Gravity/Cyanidation Test Master Composite B Cyanidation Test Test 1A Combined Knelson and Cyanide Tailings 25 11A Gravity/Cyanidation Test Master Composite B Cyanidation Test Test 11A Combined Knelson and Cyanide Tailings 28 12A Gravity/Cyanidation Test Master Composite B Cyanidation Test Test 12A Combined Knelson and Cyanide Tailings 31 13A Gravity/Cyanidation Test Master Composite B Cyanidation Test Test 12A Combined Knelson and Cyanide Tailings 34 14A Gravity/Cyanidation Test Master Composite B Cyanidation Test Test 14A Combined Knelson and Cyanide Tailings 37 15A Gravity/Cyanidation Test Master Composite B Cyanidation Test Test 15A Combined Knelson and Cyanide Tailings 4 16A Gravity/Cyanidation Test Variability Composite B Cyanidation Test Test 16A Combined Knelson and Cyanide Tailings 43 17A Gravity/Cyanidation Test Variability Composite B Cyanidation Test Test 17A Combined Knelson and Cyanide Tailings 46

39 18A Gravity/Cyanidation Test Variability Composite B Cyanidation Test Test 18A Combined Knelson and Cyanide Tailings 49 19A Gravity/Cyanidation Test Variability Composite B Cyanidation Test Test 19A Combined Knelson and Cyanide Tailings 52 2A Gravity/Cyanidation Test Variability Composite B Cyanidation Test Test 2A Combined Knelson and Cyanide Tailings 55 21A Gravity/Cyanidation Test Variability Composite B Cyanidation Test Test 21A Combined Knelson and Cyanide Tailings 58 22A Gravity/Cyanidation Test Variability Composite B Cyanidation Test Test 22A Combined Knelson and Cyanide Tailings 61 23A Gravity/Cyanidation Test Variability Composite B Cyanidation Test Test 23A Combined Knelson and Cyanide Tailings 64 24A Gravity/Cyanidation Test Variability Composite B Cyanidation Test Test 24A Combined Knelson and Cyanide Tailings 67 25A Gravity/Cyanidation Test Master Composite Cyanidation Test Test 25A Combined Knelson and Cyanide Tailings 7 27 Cyanidation Test Test 25A Combined Knelson and Cyanide Tailings Cyanidation Test Test 25A Combined Knelson and Cyanide Tailings 74

40 1 DATE: PROJECT NO: PURPOSE: PROCEDURE: May 11, 212 KM346-1 To Produce Knelson Products for ADIS. Perform standard procedure with a 5 g cone. FEED: 2 kg of Master Composite 2 ground to a nominal 114mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 15 KN Separation

41 2 KM346-1 Master Composite 2 Overall Metallurgical Balance Product Weight Assay - percent or g/t Distribution - percent grams % Au Au Knelson Concentrate Knelson Tailings Total

42 3 DATE: PROJECT NO: PURPOSE: PROCEDURE: May 14, 212 KM346-2A To Investigate a Knelson Separation Followed by Cyanidation. Standard Knelson Procedure. FEED: 2 kg Master Composite 2 ground to a nominal 114mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 15 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen. 5 g Test 2A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 5 NaCN Consumption 19.6 kg/tonne Volume of Water 2 NaOH Consumption 2.2 kg/tonne Pulp Density 2

43 4 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: May 16, 212 KM346-2B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, head space purged with oxygen. 2 g Test 2A Combined Knelson and Cyanide Tailings [Nominal K8-114µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 2 NaCN Consumption.6 kg/tonne Volume of Water 3 Lime Consumption.3 kg/tonne Pulp Density 4

44 5 KM346-2 Knelson Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) 2 3 ml Cyanide Liquor (6 hr) 6 3 ml Cyanide Liquor (24 hr) 24 3 ml Cyanide Liquor (48 hr) 48 3 ml Cyanidation Tails - 22 g Calculated Feed 22 g Head Assay 5.28 / 5.16 Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

45 6 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: May 15, 212 KM346-3 Preliminary Cyanide Leach Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, head space purged with oxygen. 2 g Master Composite 2 ground to a Nominal K8-114µm. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Total Mass of Sample 2 NaCN Consumption 1. kg/tonne Volume of Water 3 Lime Consumption.3 kg/tonne Pulp Density 4

46 7 KM346-3 Master Composite 2 Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Cyanide Liquor (2 hr) 2 3 ml Cyanide Liquor (6 hr) 6 3 ml Cyanide Liquor (24 hr) 24 3 ml Cyanide Liquor (48 hr) 48 3 ml Cyanidation Tails - 22 g Calculated Feed 22 g Head Assay 5.28 / 5.16 Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

47 8 DATE: PROJECT NO: PURPOSE: PROCEDURE: June 6, 212 KM346-4A To Investigate a Knelson Separation Followed by Cyanidation. Perform a standard Knelson procedure using a 5 g cone.. FEED: 2 kg Master Composite 3 ground to a nominal 94mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 15 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen. 5 g Test 4A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 5 NaCN Consumption 11.2 kg/tonne Volume of Water 2 NaOH Consumption 1.6 kg/tonne Pulp Density 2

48 9 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: June 6, 212 KM346-4B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, head space purged with oxygen. 2 g Test 4A Combined Knelson and Cyanide Tailings [Nominal K8-94µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 2 NaCN Consumption.5 kg/tonne Volume of Water 3 Lime Consumption.2 kg/tonne Pulp Density 4

49 1 KM346-4B Test 4A Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) 2 3 ml Cyanide Liquor (6 hr) 6 3 ml Cyanide Liquor (24 hr) 24 3 ml Cyanide Liquor (48 hr) 48 3 ml Cyanidation Tails - 2 g Calculated Feed 2 g Head Assay 2.15 Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

50 11 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: June 6, 212 KM346-5 Direct Cyanide Leach Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, head space purged with oxygen. 2 g Master Composite 3 ground to a Nominal K8-94µm. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Total Mass of Sample 2 NaCN Consumption.6 kg/tonne Volume of Water 3 Lime Consumption.2 kg/tonne Pulp Density 4

51 12 KM346-5 Master Composite 3 Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Cyanide Liquor (2 hr) 2 3 ml Cyanide Liquor (6 hr) 6 3 ml Cyanide Liquor (24 hr) 24 3 ml Cyanide Liquor (48 hr) 48 3 ml Cyanidation Tails - 2 g Calculated Feed 2 g Head Assay 2.15 Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

52 13 DATE: PROJECT NO: PURPOSE: PROCEDURE: June 18, 212 KM346-6 To Produce Knelson Products for ADIS. Perform standard procedure with a 5 g cone. FEED: 2 kg of Master Composite Composite 3 ground to a nominal 94mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 15 KN Separation

53 14 KM346-6 Master Composite 3 Overall Metallurgical Balance Product Weight Assay - g/tonne Distribution - percent grams % Au Au Knelson Concentrate Knelson Tailings Total

54 15 DATE: PROJECT NO: PURPOSE: PROCEDURE: June 2, 212 KM346-7A Repeat Test 4A at a Coarser Primary Grind. Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Master Composite 3 ground to a nominal 147mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 7 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen. 5 g Test 7A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 5 NaCN Consumption 2.8 kg/tonne Volume of Water 2 NaOH Consumption 3.7 kg/tonne Pulp Density 2

55 16 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: June 2, 212 KM346-7B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, head space purged with oxygen. 2 g Test 7A Combined Knelson and Cyanide Tailings [Nominal K8-147µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 2 NaCN Consumption.3 kg/tonne Volume of Water 3 Lime Consumption.3 kg/tonne Pulp Density 4

56 17 KM346-7 Knelson Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) 2 3 ml Cyanide Liquor (6 hr) 6 3 ml Cyanide Liquor (24 hr) 24 3 ml Cyanide Liquor (48 hr) 48 3 ml Cyanidation Tails g Calculated Feed 199 g Head Assay 2.15 Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

57 18 DATE: PROJECT NO: PURPOSE: PROCEDURE: June 2, 212 KM346-8A Repeat Test 4A at a Finer Primary Grind. Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Master Composite 3 ground to a nominal 73mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 25 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen. 5 g Test 8A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 5 NaCN Consumption 9.6 kg/tonne Volume of Water 2 NaOH Consumption 4.2 kg/tonne Pulp Density 2

58 19 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: June 2, 212 KM346-8B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, head space purged with oxygen. 2 g Test 8A Combined Knelson and Cyanide Tailings [Nominal K8-73µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 2 NaCN Consumption.4 kg/tonne Volume of Water 3 Lime Consumption.4 kg/tonne Pulp Density 4

59 2 KM346-8 Knelson Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) 2 3 ml Cyanide Liquor (6 hr) 6 3 ml Cyanide Liquor (24 hr) 24 3 ml Cyanide Liquor (48 hr) 48 3 ml Cyanidation Tails g Calculated Feed 1988 g Head Assay 2.15 Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

60 21 DATE: PROJECT NO: PURPOSE: PROCEDURE: June 2, 212 KM346-9A Repeat Test 4A at an Even Finer Primary Grind. Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Master Composite 3 ground to a nominal 6mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 4 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen. 5 g Test 9A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid (g) NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 5 NaCN Consumption 14.4 kg/tonne Volume of Water 2 NaOH Consumption 2. kg/tonne Pulp Density 2

61 22 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: June 2, 212 KM346-9B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, head space purged with oxygen. 2 g Test 9A Combined Knelson and Cyanide Tailings [Nominal K8-6µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 2 NaCN Consumption.9 kg/tonne Volume of Water 3 Lime Consumption.4 kg/tonne Pulp Density 4

62 23 KM346-9 Knelson Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) 2 3 ml Cyanide Liquor (6 hr) 6 3 ml Cyanide Liquor (24 hr) 24 3 ml Cyanide Liquor (48 hr) 48 3 ml Cyanidation Tails g Calculated Feed 1997 g Head Assay 2.15 Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

63 24 DATE: PROJECT NO: July 3, 212 KM346-1A PURPOSE: Repeat Test 4A. PROCEDURE: Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Master Composite 3 ground to a nominal 94mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 15 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen. 5 g Test 1A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 5 NaCN Consumption 6. kg/tonne Volume of Water 2 NaOH Consumption 1.7 kg/tonne Pulp Density 2

64 25 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 4, 212 KM346-1B Repeat Test 4B with 2ppm NaCN. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 2,ppm NaCN, head space purged with oxygen. 2 g Test 1A Combined Knelson and Cyanide Tailings [Nominal K8-94µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 2 NaCN Consumption.7 kg/tonne Volume of Water 3 Lime Consumption.3 kg/tonne Pulp Density 4

65 26 KM346-1 Knelson Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) 2 3 ml Cyanide Liquor (6 hr) 6 3 ml Cyanide Liquor (24 hr) 24 3 ml Cyanide Liquor (48 hr) 48 3 ml Cyanidation Tails - 2 g Calculated Feed 2 g Head Assay 2.15 Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

66 27 DATE: PROJECT NO: July 3, 212 KM346-11A PURPOSE: Repeat Test 4A. PROCEDURE: Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Master Composite 3 ground to a nominal 94mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 15 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen. 5 g Test 11A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 5 NaCN Consumption 5.2 kg/tonne Volume of Water 2 NaOH Consumption 2.2 kg/tonne Pulp Density 2

67 28 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 4, 212 KM346-11B Repeat Test 4B with 75ppm NaCN. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 75ppm NaCN, head space purged with oxygen. 2 g Test 11A Combined Knelson and Cyanide Tailings [Nominal K8-94µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 2 NaCN Consumption.3 kg/tonne Volume of Water 3 Lime Consumption.3 kg/tonne Pulp Density 4

68 29 KM Knelson Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) 2 3 ml Cyanide Liquor (6 hr) 6 3 ml Cyanide Liquor (24 hr) 24 3 ml Cyanide Liquor (48 hr) 48 3 ml Cyanidation Tails - 2 g Calculated Feed 2 g Head Assay 2.15 Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

69 3 DATE: PROJECT NO: July 3, 212 KM346-12A PURPOSE: Repeat Test 4A. PROCEDURE: Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Master Composite 3 ground to a nominal 94mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 15 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen. 5 g Test 12A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 5 NaCN Consumption 4. kg/tonne Volume of Water 2 NaOH Consumption 2.4 kg/tonne Pulp Density 2

70 31 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 4, 212 KM346-12B Repeat Test 4B with 5ppm NaCN. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 5ppm NaCN, head space purged with oxygen. 2 g Test 12A Combined Knelson and Cyanide Tailings [Nominal K8-94µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 2 NaCN Consumption.2 kg/tonne Volume of Water 3 Lime Consumption.3 kg/tonne Pulp Density 4

71 32 KM Knelson Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) 2 3 ml Cyanide Liquor (6 hr) 6 3 ml Cyanide Liquor (24 hr) 24 3 ml Cyanide Liquor (48 hr) 48 3 ml Cyanidation Tails g Calculated Feed 1971 g Head Assay 2.15 Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

72 33 DATE: PROJECT NO: July 3, 212 KM346-13A PURPOSE: Repeat Test 4A. PROCEDURE: Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Master Composite 3 ground to a nominal 94mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 15 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen. 5 g Test 13A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 5 NaCN Consumption 5.6 kg/tonne Volume of Water 2 NaOH Consumption 1.6 kg/tonne Pulp Density 2

73 34 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 4, 212 KM346-13B Repeat Test 4B with 25ppm NaCN. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 25ppm NaCN, head space purged with oxygen. 2 g Test 13A Combined Knelson and Cyanide Tailings [Nominal K8-94µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 2 NaCN Consumption.1 kg/tonne Volume of Water 3 Lime Consumption.3 kg/tonne Pulp Density 4

74 35 KM Knelson Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) 2 3 ml Cyanide Liquor (6 hr) 6 3 ml Cyanide Liquor (24 hr) 24 3 ml Cyanide Liquor (48 hr) 48 3 ml Cyanidation Tails g Calculated Feed 1968 g Head Assay 2.15 Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

75 36 DATE: PROJECT NO: PURPOSE: PROCEDURE: July 11, 212 KM346-14A Repeat Test 1A Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Master Composite 3 ground to a nominal 94mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 15 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen. 5 g Test 14A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 5 NaCN Consumption 35.6 kg/tonne Volume of Water 2 NaOH Consumption 1. kg/tonne Pulp Density 2

76 37 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 18, 212 KM346-14B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 15 g Test 14A Combined Knelson and Cyanide Tailings [Nominal K8 94 µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 15 NaCN Consumption.4 kg/tonne Volume of Water 1575 Lime Consumption.7 kg/tonne Pulp Density 4

77 38 KM Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) ml Cyanide Liquor (6 hr) ml Cyanide Liquor (24 hr) ml Cyanide Liquor (48 hr) ml Cyanidation Tails g Calculated Feed 147 g Cyanide Leach Kinetic Curves Recovery (percent) 9 Gold Cumulative Time (hours)

78 39 DATE: PROJECT NO: PURPOSE: PROCEDURE: July 2, 212 KM346-15A To Investigate a Knelson Separation Followed by Cyanidation. Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Var 1 Composite ground to a nominal 91mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 13 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen g Test 15A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 49.3 NaCN Consumption 5.7 kg/tonne Volume of Water 2 NaOH Consumption 1.2 kg/tonne Pulp Density 2

79 4 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 25, 212 KM346-15B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 15 g Test 15A Combined Knelson and Cyanide Tailings [Nominal K8 91µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 148 NaCN Consumption.3 kg/tonne Volume of Water 1575 Lime Consumption.2 kg/tonne Pulp Density 4

80 41 KM Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) ml Cyanide Liquor (6 hr) ml Cyanide Liquor (24 hr) ml Cyanide Liquor (48 hr) ml Cyanidation Tails g Calculated Feed 148 g Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

81 1 DATE: PROJECT NO: PURPOSE: PROCEDURE: July 2, 212 KM346-16A To Investigate a Knelson Separation Followed by Cyanidation. Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Variability Composite 2 ground to a nominal 12mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 13 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen g Test 16A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 51.5 NaCN Consumption 3.9 kg/tonne Volume of Water 2 NaOH Consumption 1.1 kg/tonne Pulp Density 2

82 43 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 25, 212 KM346-16B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 15 g Test 16A Combined Knelson and Cyanide Tailings [Nominal K8 12µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 148 NaCN Consumption.5 kg/tonne Volume of Water 1575 Lime Consumption.4 kg/tonne Pulp Density 4

83 44 KM Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) ml Cyanide Liquor (6 hr) ml Cyanide Liquor (24 hr) ml Cyanide Liquor (48 hr) ml Cyanidation Tails g.2 1. Calculated Feed 148 g Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

84 1 DATE: PROJECT NO: PURPOSE: PROCEDURE: July 2, 212 KM346-17A To Investigate a Knelson Separation Followed by Cyanidation. Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Variability Composite 3 ground to a nominal 112mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 14 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen g Test 17A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 58.9 NaCN Consumption 2.4 kg/tonne Volume of Water 2 NaOH Consumption 1. kg/tonne Pulp Density 23

85 46 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 25, 212 KM346-17B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 15 g Test 17A Combined Knelson and Cyanide Tailings [Nominal K8 112µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 147 NaCN Consumption.4 kg/tonne Volume of Water 1575 Lime Consumption.4 kg/tonne Pulp Density 4

86 47 KM Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) ml Cyanide Liquor (6 hr) ml Cyanide Liquor (24 hr) ml Cyanide Liquor (48 hr) ml Cyanidation Tails g Calculated Feed 147 g Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

87 1 DATE: PROJECT NO: PURPOSE: PROCEDURE: July 2, 212 KM346-18A To Investigate a Knelson Separation Followed by Cyanidation. Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Variability Composite 5 ground to a nominal 11mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 13 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen g Test 18A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 55.1 NaCN Consumption 4.7 kg/tonne Volume of Water 2 NaOH Consumption 1. kg/tonne Pulp Density 22

88 49 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 25, 212 KM346-18B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 15 g Test 18A Combined Knelson and Cyanide Tailings [Nominal K8 11µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 148 NaCN Consumption.4 kg/tonne Volume of Water 1575 Lime Consumption.4 kg/tonne Pulp Density 4

89 5 KM Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) ml Cyanide Liquor (6 hr) ml Cyanide Liquor (24 hr) ml Cyanide Liquor (48 hr) ml Cyanidation Tails g Calculated Feed 148 g Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

90 1 DATE: PROJECT NO: PURPOSE: PROCEDURE: July 2, 212 KM346-19A To Investigate a Knelson Separation Followed by Cyanidation. Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Variability Composite 6 ground to a nominal 13mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 14.5 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen g Test 19A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 57.8 NaCN Consumption 2.4 kg/tonne Volume of Water 2 NaOH Consumption 1. kg/tonne Pulp Density 22

91 52 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 25, 212 KM346-19B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 15 g Test 19A Combined Knelson and Cyanide Tailings [Nominal K8 13µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 149 NaCN Consumption.4 kg/tonne Volume of Water 1575 Lime Consumption.4 kg/tonne Pulp Density 4

92 53 KM Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) ml Cyanide Liquor (6 hr) ml Cyanide Liquor (24 hr) ml Cyanide Liquor (48 hr) ml Cyanidation Tails g Calculated Feed 149 g Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

93 54 DATE: PROJECT NO: PURPOSE: PROCEDURE: July 2, 212 KM346-2A To Investigate a Knelson Separation Followed by Cyanidation. Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Variability Composite 7 ground to a nominal 91mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 13 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen g Test 2A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 45.2 NaCN Consumption 8.9 kg/tonne Volume of Water 2 NaOH Consumption 1.1 kg/tonne Pulp Density 18

94 55 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 25, 212 KM346-2B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 15 g Test 2A Combined Knelson and Cyanide Tailings [Nominal K8 94µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 148 NaCN Consumption.3 kg/tonne Volume of Water 1575 Lime Consumption.4 kg/tonne Pulp Density 4

95 56 KM346-2 Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) ml Cyanide Liquor (6 hr) ml Cyanide Liquor (24 hr) ml Cyanide Liquor (48 hr) ml Cyanidation Tails g Calculated Feed 148 g Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

96 1 DATE: PROJECT NO: PURPOSE: PROCEDURE: July 2, 212 KM346-21A To Investigate a Knelson Separation Followed by Cyanidation. Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Variability Composite 8 ground to a nominal 1mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 13 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen g Test 21A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 77. NaCN Consumption 3.6 kg/tonne Volume of Water 2 NaOH Consumption 1. kg/tonne Pulp Density 28

97 58 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 25, 212 KM346-21B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 15 g Test 21A Combined Knelson and Cyanide Tailings [Nominal K8 75µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 148 NaCN Consumption.5 kg/tonne Volume of Water 1575 Lime Consumption.4 kg/tonne Pulp Density 4

98 59 KM Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) ml Cyanide Liquor (6 hr) ml Cyanide Liquor (24 hr) ml Cyanide Liquor (48 hr) ml Cyanidation Tails g Calculated Feed 148 g Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

99 1 DATE: PROJECT NO: PURPOSE: PROCEDURE: July 2, 212 KM346-22A To Investigate a Knelson Separation Followed by Cyanidation. Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Variability Composite 9 ground to a nominal 93mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 13 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen g Test 22A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 42.2 NaCN Consumption 11.9 kg/tonne Volume of Water 2 NaOH Consumption 1.1 kg/tonne Pulp Density 17

100 61 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 25, 212 KM346-22B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 15 g Test 22A Combined Knelson and Cyanide Tailings [Nominal K8 9µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 146 NaCN Consumption.4 kg/tonne Volume of Water 1575 Lime Consumption.3 kg/tonne Pulp Density 4

101 62 KM Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) ml Cyanide Liquor (6 hr) ml Cyanide Liquor (24 hr) ml Cyanide Liquor (48 hr) ml Cyanidation Tails g Calculated Feed 146 g Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

102 1 DATE: PROJECT NO: PURPOSE: PROCEDURE: July 2, 212 KM346-23A To Investigate a Knelson Separation Followed by Cyanidation. Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Variability Composite 1 ground to a nominal 93mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 13 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen g Test 23A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 53.7 NaCN Consumption 1.1 kg/tonne Volume of Water 2 NaOH Consumption.8 kg/tonne Pulp Density 21

103 64 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 25, 212 KM346-23B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 15 g Test 23A Combined Knelson and Cyanide Tailings [Nominal K8 92µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 147 NaCN Consumption.4 kg/tonne Volume of Water 1575 Lime Consumption.3 kg/tonne Pulp Density 4

104 65 KM Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) ml Cyanide Liquor (6 hr) ml Cyanide Liquor (24 hr) ml Cyanide Liquor (48 hr) ml Cyanidation Tails g Calculated Feed 147 g Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

105 1 DATE: PROJECT NO: PURPOSE: PROCEDURE: July 2, 212 KM346-24A To Investigate a Knelson Separation Followed by Cyanidation. Standard Knelson Procedure using a 5 g cone. FEED: 2 kg of Variability Composite 4 ground to a nominal 11mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 2 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen g Test 24A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 43.9 NaCN Consumption 4.1 kg/tonne Volume of Water 2 NaOH Consumption.9 kg/tonne Pulp Density 18

106 67 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 25, 212 KM346-24B Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 15 g Test 24A Combined Knelson and Cyanide Tailings [Nominal K8 85µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 143 NaCN Consumption.4 kg/tonne Volume of Water 1575 Lime Consumption.4 kg/tonne Pulp Density 4

107 68 KM Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor 2 ml Cyanide Liquor (2 hr) ml Cyanide Liquor (6 hr) ml Cyanide Liquor (24 hr) ml Cyanide Liquor (48 hr) ml Cyanidation Tails g Calculated Feed 143 g Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

108 69 DATE: PROJECT NO: PURPOSE: PROCEDURE: July 26, 212 KM346-25A To Investigate a Knelson Separation Followed by Cyanidation. Standard Knelson Procedure using a 1 g cone. FEED: 16 kg of Master Composite 3 ground to a nominal 94mm K 8. FLOWSHEET NO: 4 Stage Inlet Outlet Pressures Time Pressure Start Finish Minutes Grind 15 KN Separation PURPOSE: PROCEDURE: SAMPLE: Intensive Cyanidation on Knelson Concentrate. Standard 24 hr bottle roll procedure. Agitate on rolls using cyanide and Sodium Hydroxide. 5, NaCN, 2g/L Leach Aid, head space purged with oxygen. 27 g Test 25A Knelson Concentrate. Parameter Time Cum Residual (g) Assay - g/t Added (g) Cons'd (g) Dissolved Leach ph O2 (mg/l) Aid NaCN NaOH NaCN NaCN Au Natural Leach Leach Total Mass of Sample 27 NaCN Consumption 6.1 kg/tonne Volume of Water 11 NaOH Consumption.5 kg/tonne Pulp Density 2

109 7 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 26, 212 KM Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 6 g Test 25A Combined Knelson and Cyanide Tailings [Nominal K8 94µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 6 NaCN Consumption.4 kg/tonne Volume of Water 9 Lime Consumption.3 kg/tonne Pulp Density 4

110 71 KM Test 25A Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor* 413 ml Cyanide Liquor (2 hr) 2 9 ml Cyanide Liquor (6 hr) 6 9 ml Cyanide Liquor (24 hr) 24 9 ml Cyanide Liquor (48 hr) 48 9 ml Cyanidation Tails - 6 g Calculated Feed 6 g * Proportionally adjusted to feed to gravity separation stage Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

111 72 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 26, 212 KM Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 6 g Test 25A Combined Knelson and Cyanide Tailings [Nominal K8 94µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 6 NaCN Consumption.3 kg/tonne Volume of Water 9 Lime Consumption.3 kg/tonne Pulp Density 4

112 73 KM Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor* 413 ml Cyanide Liquor (2 hr) 2 9 ml Cyanide Liquor (6 hr) 6 9 ml Cyanide Liquor (24 hr) 24 9 ml Cyanide Liquor (48 hr) 48 9 ml Cyanidation Tails - 6 g.1.4 Calculated Feed 6 g * Proportionally adjusted to feed to gravity separation stage Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

113 74 Date: PROJECT NO: PURPOSE: PROCEDURE: SAMPLE: July 26, 212 KM Cyanidation on Combined Knelson and Concentrate Tails. Standard 48 hour bottle roll procedure. Agitate on rolls using cyanide and lime. 1, NaCN, Air Sparge throughout test. 4g Test 25A Combined Knelson and Cyanide Tailings [Nominal K8 94µm]. Parameter Time Added (g) Residual (g) Consumed (g) Dissolved ph Cum NaCN Lime NaCN NaCN O 2 (mg/l) Natural Leach Leach Leach Leach Leach Total Mass of Sample 4 NaCN Consumption.2 kg/tonne Volume of Water 6 Lime Consumption.3 kg/tonne Pulp Density 4

114 75 KM Combined Knelson and Cyanide Tailings Cumulative Metallurgical Balance Product Cumulative Volume or Assay - g/t Distribution - percent Units Time - Hrs Mass Gold Gold Gravity Liquor* 275 ml Cyanide Liquor (2 hr) 2 6 ml Cyanide Liquor (6 hr) 6 6 ml Cyanide Liquor (24 hr) 24 6 ml Cyanide Liquor (48 hr) 48 6 ml Cyanidation Tails - 4 g.2.7 Calculated Feed 4 g * Proportionally adjusted to feed to gravity separation stage Cyanide Leach Kinetic Curves Recovery (percent) Gold Cumulative Time (hours)

115 APPENDIX III KM346 PARTICLE SIZING DATA

116 INDEX TABLE m K 8 PAGE GRIND CALIBRAITONS III-1 KM346 Master Composite 2 8 Minute Grind III-2 KM346 Master Composite 2 12 Minute Grind III-3 KM346 Master Composite 2 13 Minute Grind III-4 KM346 Master Composite 2 15 Minute Grind III-5 KM346 Master Composite 2 2 Minute Grind 82 5 III-6 KM346 Master Composite 2 4 Minute Grind 6 6 III-7 KM346 Master Composite 3 7 Minute Grind III-8 KM346 Master Composite 3 1 Minute Grind III-9 KM346 Master Composite 3 13 Minute Grind 12 9 III-1 KM346 Master Composite 3 15 Minute Grind 94 1 III-11 KM346 Master Composite Minute Grind III-12 KM346 Master Composite 3 25 Minute Grind III-13 KM346 Master Composite 3 4 Minute Grind 6 13 III-14 KM346 Variability Composite 1 13 Minute Grind III-15 KM346 Variability Composite 2 13 Minute Grind III-16 KM346 Variability Composite 3 13 Minute Grind III-17 KM346 Variability Composite 4 13 Minute Grind III-18 KM346 Variability Composite 4 2 Minute Grind III-19 KM346 Variability Composite 5 13 Minute Grind III-2 KM346 Variability Composite 6 13 Minute Grind 12 2 III-21 KM346 Variability Composite 7 13 Minute Grind III-22 KM346 Variability Composite 7 2 Minute Grind III-23 KM346 Variability Composite 8 13 Minute Grind 1 23 III-24 KM346 Variability Composite 9 13 Minute Grind III-25 KM346 Variability Composite 1 13 Minute Grind TEST PRODUCTS III-26 KM346-5 Cyanide Tail 95 26

117 III-27 KM Cyanide Tail III-28 KM Cyanide Tail III-29 KM Cyanide Tail III-3 KM Cyanide Tail III-31 KM Cyanide Tail III-32 KM Cyanide Tail III-33 KM346-2 Cyanide Tail III-34 KM Cyanide Tail` III-35 KM Cyanide Tail 9 35 III-36 KM Cyanide Tail III-37 KM Cyanide Tail III-38 KM Cyanide Tail III-39 KM Cyanide Tail III-4 KM Cyanide Tail 67 4

118 1 TABLE III-1 SCREEN ANALYSIS KM346 Master Composite 2-8 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 35 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =148µm Note: 8 min. grind calibration using 1 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

119 2 TABLE III-2 SCREEN ANALYSIS KM346 Master Composite 2-12 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =117µm Note: 12 min. grind calibration using 2 kg. Ore, 1 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

120 3 TABLE III-3 SCREEN ANALYSIS KM346 Master Composite 2-13 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =118µm Note: 13 min. grind calibration using 2 kg. Ore, 1 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

121 4 TABLE III-4 SCREEN ANALYSIS KM346 Master Composite 2-15 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =114µm Note: 15 min. grind calibration using 2 kg. Ore, 1 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

122 5 TABLE III-5 SCREEN ANALYSIS KM346 Master Composite 2-2 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =82µm Note: 2 min. grind calibration using 1 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

123 6 TABLE III-6 SCREEN ANALYSIS KM346 Master Composite 2-4 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 1 Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =6µm Note: 4 min. grind calibration using 1 kg. Ore, 1 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

124 7 TABLE III-7 SCREEN ANALYSIS KM346 Master Composite 3-7 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 35 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =147µm Note: 7 min. grind calibration using 1 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

125 8 TABLE III-8 SCREEN ANALYSIS KM346 Master Composite 3-1 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =116µm Note: 1 min. grind calibration using 2 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

126 9 TABLE III-9 SCREEN ANALYSIS KM346 Master Composite 3-13 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =12µm Note: 13 min. grind calibration using 2 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

127 1 TABLE III-1 SCREEN ANALYSIS KM346 Master Composite 3-15 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =94µm Note: 15 min. grind calibration using 2 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

128 11 TABLE III-11 SCREEN ANALYSIS KM346 Master Composite Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =66µm Note: 15.5 min. grind calibration using 2 kg. Ore, 1 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

129 12 TABLE III-12 SCREEN ANALYSIS KM346 Master Composite 3-25 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =73µm Note: 25 min. grind calibration using 2 kg. Ore, 1 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

130 13 TABLE III-13 SCREEN ANALYSIS KM346 Master Composite 3-4 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 1 Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =6µm Note: 4 min. grind calibration using 2 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

131 14 TABLE III-14 SCREEN ANALYSIS KM346 Variability Composite 1-13 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =91µm Note: 13 min. grind calibration using 2 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

132 15 TABLE III-15 SCREEN ANALYSIS KM346 Variability Composite 2-13 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =12µm Note: 13 min. grind calibration using 2 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

133 16 TABLE III-16 SCREEN ANALYSIS KM346 Variability Composite 3-13 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =112µm Note: 13 min. grind calibration using 2 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

134 17 TABLE III-17 SCREEN ANALYSIS KM346 Variability Composite 4-13 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 35 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =226µm Note: 13 min. grind calibration using 1 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

135 18 TABLE III-18 SCREEN ANALYSIS KM346 Variability Composite 4-2 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =11µm Note: 13 min. grind calibration using 1 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

136 19 TABLE III-19 SCREEN ANALYSIS KM346 Variability Composite 5-13 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =11µm Note: 13 min. grind calibration using 1 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

137 2 TABLE III-2 SCREEN ANALYSIS KM346 Variability Composite 6-13 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =12µm Note: 13 min. grind calibration using 1 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

138 21 TABLE III-21 SCREEN ANALYSIS KM346 Variablility Composite 7-13 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =91µm Note: 13 min. grind calibration using 2 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

139 22 TABLE III-22 SCREEN ANALYSIS KM346 Variablility Composite 7-2 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =75µm Note: 2 min. grind calibration using 2 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

140 23 TABLE III-23 SCREEN ANALYSIS KM346 Variability Composite 8-13 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =1µm Note: 13 min. grind calibration using 2 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

141 24 TABLE III-24 SCREEN ANALYSIS KM346 Variability Composite 9-13 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 35 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =93µm Note: 13 min. grind calibration using 1 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

142 25 TABLE III-25 SCREEN ANALYSIS KM346 Variability Composite 1-13 Minute Grind Calibration Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =93µm Note: 13 min. grind calibration using 1 kg. Ore, 15 ml water and 2 kg. of Mild Steel rods in Mill: M4 Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

143 26 TABLE III-26 SCREEN ANALYSIS KM346-5 Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =95µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

144 27 TABLE III-27 SCREEN ANALYSIS KM Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =92µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

145 28 TABLE III-28 SCREEN ANALYSIS KM Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =91µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

146 29 TABLE III-29 SCREEN ANALYSIS KM Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =13µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

147 3 TABLE III-3 SCREEN ANALYSIS KM Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 35 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =146µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

148 31 TABLE III-31 SCREEN ANALYSIS KM Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 48 Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =99µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

149 32 TABLE III-32 SCREEN ANALYSIS KM Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =13µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

150 33 TABLE III-33 SCREEN ANALYSIS KM346-2 Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =94µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

151 34 TABLE III-34 SCREEN ANALYSIS KM Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =75µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

152 35 TABLE III-35 SCREEN ANALYSIS KM Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =9µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

153 36 TABLE III-36 SCREEN ANALYSIS KM Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =92µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

154 37 TABLE III-37 SCREEN ANALYSIS KM Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =85µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

155 38 TABLE III-38 SCREEN ANALYSIS KM Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =61µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

156 39 TABLE III-39 SCREEN ANALYSIS KM Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =55µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

157 4 TABLE III-4 SCREEN ANALYSIS KM Cyanide Tailing Product Particle Size Weight Cumulative µm % Retained % Passing 65 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =67µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

158 APPENDIX IV KM346 COMMINUTION DATA

159 INDEX TABLE PAGE BOND BALL TESTS IV-1 KM346 Master Composite 2 1 IV-2 KM346 Variability Composite 3 6 IV-3 KM346 Variability Composite 4 11 IV-4 KM346 Variability Composite 7 16 IV-5 KM346 Variability Composite 8 21 IV-6 KM346 Variability Composite 9 26 IV-7 KM346 Variability Composite 1 31 REFERENCE SMC Test Report JKTech Job No. 1217/P1

160 1 TABLE IV-1A BOND BALL GRINDABILITY TEST KM346 Master Composite 2 Weight of 7 ml Sample : g. Aperture Test Sieve : 16µm 1/3.5 of Sample Weight : 42.5 g. Percent Undersize : 27.9% Cycle Weight of Number of Weight of Undersize New Feed Revolutions Product Feed Net Product Net / Rev BOND'S WORK INDEX FORMULA Wi = 44.5 / (Pi^.23 x Gpb^.82 x (1/ P - 1/ F)) Pi = Sieve Size Tested 16 µm Gbp = Net undersize produced per revolution of mill g. P = 8% Passing size of test product. 83 µm F = 8% Passing size of test feed µm WORK INDEX (Wi) 9.8 kw-hr/ton 1.8 kw-hr/tonne NB: Gbp = Average of last 3 Net/Rev Cycles

161 2 TABLE IV-1B BOND BALL SCREEN ANALYSIS KM346 Master Composite 2 - Cycle 6 Undersize Product Particle Size Weight Cumulative µm % Retained % Passing 15 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =83µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

162 3 TABLE IV-1C BOND BALL SCREEN ANALYSIS KM346 Master Composite 2 - Average Feed Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2257µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

163 4 TABLE IV-1D BOND BALL SCREEN ANALYSIS KM346 Master Composite 2 - Feed 1 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2249µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

164 5 TABLE IV-1E BOND BALL SCREEN ANALYSIS KM346 Master Composite 2 - Feed 2 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2264µm Particle Size Distribution Plot Cumulative Percent Passing Particel Size (microns)

165 6 TABLE IV-2A BOND BALL GRINDABILITY TEST KM346 Variability Composite 3 Weight of 7 ml Sample : g. Aperture Test Sieve : 16µm 1/3.5 of Sample Weight : g. Percent Undersize : 17.1% Cycle Weight of Number of Weight of Undersize New Feed Revolutions Product Feed Net Product Net / Rev BOND'S WORK INDEX FORMULA Wi = 44.5 / (Pi^.23 x Gpb^.82 x (1/ P - 1/ F)) Pi = Sieve Size Tested 16 µm Gbp = Net undersize produced per revolution of mill g. P = 8% Passing size of test product. 81 µm F = 8% Passing size of test feed. 242 µm WORK INDEX (Wi) 12.7 kw-hr/ton 13.9 kw-hr/tonne NB: Gbp = Average of last 3 Net/Rev Cycles

166 7 TABLE IV-2B BOND BALL SCREEN ANALYSIS KM346 Variability Composite 3 - Cycle 7 Undersize Product Particle Size Weight Cumulative µm % Retained % Passing 15 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =81µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

167 8 TABLE IV-2C BOND BALL SCREEN ANALYSIS KM346 Variability Composite 3 - Average Feed Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =242µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

168 9 TABLE IV-2D BOND BALL SCREEN ANALYSIS KM346 Variability Composite 3 - Feed 1 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2376µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

169 1 TABLE IV-2E BOND BALL SCREEN ANALYSIS KM346 Variability Composite 3 - Feed 2 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2431µm Particle Size Distribution Plot Cumulative Percent Passing Particel Size (microns)

170 11 TABLE IV-3A BOND BALL GRINDABILITY TEST KM346 Variability Composite 4 Weight of 7 ml Sample : g. Aperture Test Sieve : 16µm 1/3.5 of Sample Weight : g. Percent Undersize : 19.9% Cycle Weight of Number of Weight of Undersize New Feed Revolutions Product Feed Net Product Net / Rev BOND'S WORK INDEX FORMULA Wi = 44.5 / (Pi^.23 x Gpb^.82 x (1/ P - 1/ F)) Pi = Sieve Size Tested 16 µm Gbp = Net undersize produced per revolution of mill. 2. g. P = 8% Passing size of test product. 85 µm F = 8% Passing size of test feed. 234 µm WORK INDEX (Wi) 9.8 kw-hr/ton 1.8 kw-hr/tonne NB: Gbp = Average of last 3 Net/Rev Cycles

171 12 TABLE IV-3B BOND BALL SCREEN ANALYSIS KM346 Variability Composite 4 - Cycle 7 Undersize Product Particle Size Weight Cumulative µm % Retained % Passing 15 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =85µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

172 13 TABLE IV-3C BOND BALL SCREEN ANALYSIS KM346 Variability Composite 4 - Average Feed Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =234µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

173 14 TABLE IV-3D BOND BALL SCREEN ANALYSIS KM346 Variability Composite 4 - Feed 1 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2357µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

174 15 TABLE IV-3E BOND BALL SCREEN ANALYSIS KM346 Variability Composite 4 - Feed 2 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2321µm Particle Size Distribution Plot Cumulative Percent Passing Particel Size (microns)

175 16 TABLE IV-4A BOND BALL GRINDABILITY TEST KM346 Variability Composite 7 Weight of 7 ml Sample : g. Aperture Test Sieve : 16µm 1/3.5 of Sample Weight : g. Percent Undersize : 2.4% Cycle Weight of Number of Weight of Undersize New Feed Revolutions Product Feed Net Product Net / Rev BOND'S WORK INDEX FORMULA Wi = 44.5 / (Pi^.23 x Gpb^.82 x (1/ P - 1/ F)) Pi = Sieve Size Tested 16 µm Gbp = Net undersize produced per revolution of mill g. P = 8% Passing size of test product. 85 µm F = 8% Passing size of test feed µm WORK INDEX (Wi) 9.3 kw-hr/ton 1.2 kw-hr/tonne NB: Gbp = Average of last 3 Net/Rev Cycles

176 17 TABLE IV-4B BOND BALL SCREEN ANALYSIS KM346 Variability Composite 7 - Cycle 6 Undersize Product Particle Size Weight Cumulative µm % Retained % Passing 15 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =85µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

177 18 TABLE IV-4C BOND BALL SCREEN ANALYSIS KM346 Variability Composite 7 - Average Feed Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2261µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

178 19 TABLE IV-4D BOND BALL SCREEN ANALYSIS KM346 Variability Composite 7 - Feed 1 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2261µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

179 2 TABLE IV-4E BOND BALL SCREEN ANALYSIS KM346 Variability Composite 7 - Feed 2 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2261µm Particle Size Distribution Plot Cumulative Percent Passing Particel Size (microns)

180 21 TABLE IV-5A BOND BALL GRINDABILITY TEST KM346 Variability Composite 8 Weight of 7 ml Sample : g. Aperture Test Sieve : 16µm 1/3.5 of Sample Weight : g. Percent Undersize : 17.1% Cycle Weight of Number of Weight of Undersize New Feed Revolutions Product Feed Net Product Net / Rev BOND'S WORK INDEX FORMULA Wi = 44.5 / (Pi^.23 x Gpb^.82 x (1/ P - 1/ F)) Pi = Sieve Size Tested 16 µm Gbp = Net undersize produced per revolution of mill. 2.1 g. P = 8% Passing size of test product. 86 µm F = 8% Passing size of test feed. 236 µm WORK INDEX (Wi) 9.5 kw-hr/ton 1.4 kw-hr/tonne NB: Gbp = Average of last 3 Net/Rev Cycles

181 22 TABLE IV-5B BOND BALL SCREEN ANALYSIS KM346 Variability Composite 8 - Cycle 6 Undersize Product Particle Size Weight Cumulative µm % Retained % Passing 15 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =86µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

182 23 TABLE IV-5C BOND BALL SCREEN ANALYSIS KM346 Variability Composite 8 - Average Feed Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =236µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

183 24 TABLE IV-5D BOND BALL SCREEN ANALYSIS KM346 Variability Composite 8 - Feed 1 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2355µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

184 25 TABLE IV-5E BOND BALL SCREEN ANALYSIS KM346 Variability Composite 8 - Feed 2 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2367µm Particle Size Distribution Plot Cumulative Percent Passing Particel Size (microns)

185 26 TABLE IV-6A BOND BALL GRINDABILITY TEST KM346 Variability Composite 9 Weight of 7 ml Sample : g. Aperture Test Sieve : 16µm 1/3.5 of Sample Weight : g. Percent Undersize : 19.% Cycle Weight of Number of Weight of Undersize New Feed Revolutions Product Feed Net Product Net / Rev BOND'S WORK INDEX FORMULA Wi = 44.5 / (Pi^.23 x Gpb^.82 x (1/ P - 1/ F)) Pi = Sieve Size Tested 16 µm Gbp = Net undersize produced per revolution of mill g. P = 8% Passing size of test product. 85 µm F = 8% Passing size of test feed µm WORK INDEX (Wi) 8.1 kw-hr/ton 8.9 kw-hr/tonne NB: Gbp = Average of last 3 Net/Rev Cycles

186 27 TABLE IV-6B BOND BALL SCREEN ANALYSIS KM346 Variability Composite 9 - Cycle 7 Undersize Product Particle Size Weight Cumulative µm % Retained % Passing 15 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =85µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

187 28 TABLE IV-6C BOND BALL SCREEN ANALYSIS KM346 Variability Composite 9 - Average Feed Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2351µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

188 29 TABLE IV-6D BOND BALL SCREEN ANALYSIS KM346 Variability Composite 9 - Feed 1 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2346µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

189 3 TABLE IV-6E BOND BALL SCREEN ANALYSIS KM346 Variability Composite 9 - Feed 2 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2357µm Particle Size Distribution Plot Cumulative Percent Passing Particel Size (microns)

190 31 TABLE IV-7A BOND BALL GRINDABILITY TEST KM346 Variability Composite 1 Weight of 7 ml Sample : g. Aperture Test Sieve : 16µm 1/3.5 of Sample Weight : g. Percent Undersize : 22.1% Cycle Weight of Number of Weight of Undersize New Feed Revolutions Product Feed Net Product Net / Rev BOND'S WORK INDEX FORMULA Wi = 44.5 / (Pi^.23 x Gpb^.82 x (1/ P - 1/ F)) Pi = Sieve Size Tested 16 µm Gbp = Net undersize produced per revolution of mill g. P = 8% Passing size of test product. 88 µm F = 8% Passing size of test feed µm WORK INDEX (Wi) 8.4 kw-hr/ton 9.2 kw-hr/tonne NB: Gbp = Average of last 3 Net/Rev Cycles

191 32 TABLE IV-7B BOND BALL SCREEN ANALYSIS KM346 Variability Composite 1 - Cycle 8 Undersize Product Particle Size Weight Cumulative µm % Retained % Passing 15 Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =88µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

192 33 TABLE IV-7C BOND BALL SCREEN ANALYSIS KM346 Variability Composite 1 - Average Feed Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2289µm Cumulative Percent Passing Particle Size Distribution Plot Particle Size (microns)

193 34 TABLE IV-7D BOND BALL SCREEN ANALYSIS KM346 Variability Composite 1 - Feed 1 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2294µm Particle Size Distribution Plot Cumulative Percent Passing Particle Size (microns)

194 35 TABLE IV-7E BOND BALL SCREEN ANALYSIS KM346 Variability Composite 1 - Feed 2 Product Particle Size Weight Cumulative µm % Retained % Passing 6 Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh Mesh TOTAL 1. ** K8 =2284µm Particle Size Distribution Plot Cumulative Percent Passing Particel Size (microns)

195 SMC TEST REPORT Goliath Gold Prepared by: Matt Weier JKTech Job No: 1217/P1 Date: May 212

196 JKTech Pty Ltd SMC Test Report on A Single Sample from Goliath Gold Project JKTech Job No. 1217/P1 - May 212 Submitted to Goliath Gold Tested at G & T, Kamloops, BC, Canada

197 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold TABLE OF CONTENTS Page No 1 INTRODUCTION THE SMC TEST Introduction General Description and Test Background The Test Procedure Particle Selection Method Cut Core Method SMC Test Results REFERENCES DISCLAIMER APPENDICES Page No APPENDIX A. BACKGROUND TO THE SMC TEST APPENDIX B. USE OF THE Mia, Mib, Mih, Mic IN PREDICTING COMMINUTION CIRCUIT SPECIFIC ENERGY LIST OF FIGURES Page No Figure 1 Relationship between Particle Size and A*b... 5 Figure 2 A Typical Set of Particles for Breakage (Particle Selection Method)... 6 Figure 3 Orientations of Pieces for Breakage (Cut Core Method)... 7 Figure 4 Cumulative Distribution of DWi Values in SMC Test Database... 9 Figure 5 - Cumulative Distribution of M ia, M ih and M ic Values in the SMCT Database... 9 Figure 6 - Frequency Distribution of A*b in the JKTech Database Figure 7 - Frequency Distribution of t in the JKTech Database JKTech Job No. 1217/P1 i

198 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold LIST OF TABLES Page No Table 1 - SMC Test Results... 8 Table 2 Energy Requirements Related to Particle Size... 8 Table 3 Derived Values for A*b and t1 at 1 kwh/t... 1 JKTech Job No. 1217/P1 ii

199 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold 1 INTRODUCTION SMC data for one sample from Goliath Gold Project were received from G & T on May 8, 212, by JKTech for SMC test analysis. The sample was identified as Master Composite 2. The data were analysed to determine the JKSimMet comminution parameters. SMC test results were forwarded to SMC Testing Pty Ltd for the analysis. Analysis and reporting were completed on May 9, 212. JKTech Job No. 1217/P1 3

200 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold 2 THE SMC TEST 2.1 INTRODUCTION The standard JK Drop-Weight test provides ore specific parameters for use in the JKSimMet Mineral Processing Simulator software. In JKSimMet, these parameters are combined with equipment details and operating conditions to analyse and/or predict SAG/autogenous mill performance. The same test procedure also provides ore type characterisation for the JKSimMet crusher model. The SMC (SAG Mill Comminution) test was developed by Steve Morrell of SMC Testing Pty Ltd (SMCT) to provide a cost effective means of obtaining these parameters from drill core or in situations where limited quantities of material are available. The ore specific parameters have been calculated from the test results and are supplied to Goliath Gold in this report as part of the standard procedure 2.2 GENERAL DESCRIPTION AND TEST BACKGROUND The SMC Test was originally designed for the breakage characterisation of drill core and it generates a relationship between input energy (kwh/t) and the percent of broken product passing a specified sieve size. The results are used to determine the so-called JK Drop-Weight index (DWi), which is a measure of the strength of the rock when broken under impact conditions and has the units kwh/m 3. The DWi is directly related to the JK rock breakage parameters A and b and hence can be used to estimate the values of these parameters as well as being correlated with the JK abrasion parameter - t a. For crusher modelling the t 1 -E cs matrix can also be derived. This is done by using the size-by-size A*b values that are used in the SMC Test data analysis (see below) to estimate the t 1 -E cs values for each of the relevant size fractions in the crusher model matrix. For power-based calculations, (see APPENDIX B), the SMC Test provides the comminution parameters M ia, M ih and M ic. M ia is the work index for the grinding of coarser particles (> 75 µm) in tumbling mills such as autogenous (AG), semiautogenous (SAG), rod and ball mills. M ih is the work index for the grinding in High Pressure Grinding Rolls (HPGR) and M ic for size reduction in conventional crushers. The SMC Test is a precision test, which uses particles that are either cut from drill core using a diamond saw to achieve close size replication or else selected from crushed material so that particle mass variation is controlled within a prescribed range. The particles are then broken at a number of prescribed impact energies. The high degree of control imposed on both the size of particles and the breakage energies used, means that the test is largely free of the repeatability problems associated with tumbling-mill based tests. Such tests usually suffer from variations in feed size (which is not closely controlled) and energy input, often assumed to be constant when in reality it can be highly variable (Levin, 1989). The relationship between the DWi and the JK rock breakage parameters makes use of the size-by-size nature of rock strength that is often apparent from the results of full JK Drop-Weight tests. The effect is illustrated in Figure 1, which plots the normalized values of A*b against particle size. This figure also shows how the gradient of these plots varies across the full range of rock types tested. In the case of a conventional JK Drop-Weight test, these values are effectively averaged and a JKTech Job No. 1217/P1 4

201 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold mean value of A and b is reported. The SMC Test uses a single size and makes use of relationships such as that shown in Figure 1 to predict the A and b of the particle size that has the same value as the mean for a JK full Drop-Weight test A*b Normalised min gradient average particle size for mean gradient drop-weight test max gradient Particle Size (mm) Figure 1 Relationship between Particle Size and A*b 2.3 THE TEST PROCEDURE In the SMC Test, five sets of 2 particles are broken, each set at a different specific energy level, using a JK Drop-Weight tester. The breakage products are screened at a sieve size selected to provide a direct measurement of the t 1 value. The test calls for a prescribed target average volume for the particles, with the target being chosen to be equivalent to the mean volume of particles in one of the standard JK Drop-Weight test size fractions. The rest height of the drop-head (gap) is recorded after breakage of each particle to allow for a correction to the drop energy. After breaking all 2 particles in a set, the broken product is sieved at an aperture size, one tenth of the original particle size. Thus, the percent passing mass gives a direct reading of the t 1 value for breakage at that energy level. There are two alternative methods of preparing the particle sets for breakage testing: the particle selection method and the cut core method. The particle selection method is the most commonly used as it is generally less time consuming. The cut core method requires less material, so tends to be used as a fallback method, only when necessary to cope with restricted sample availability Particle Selection Method For the particle selection method, the test is carried out on material in one of three alternative size fractions: , or mm. The largest size fraction is preferred but requires more material. The middle size fraction tends to be JKTech Job No. 1217/P1 5

202 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold most commonly used, whilst the finest size fraction tends only to be used if there is an issue with starting material size distribution or quantity. In the particle selection method, particles are chosen so that their individual masses lie within ±3% of the target mass and the mean mass for each set of 2 lies within ±1% of the target mass. A typical set of particles is shown in Figure 2. Figure 2 A Typical Set of Particles for Breakage (Particle Selection Method) Before commencing breakage tests on the particles, the ore density is determined by first weighing a representative sample of particles in air and then in water Cut Core Method The cut core method uses cut pieces of quartered (slivered) drill core. Whole core or half core can be used, but when received in this form it needs to be first quartered as a preliminary step in the procedure. Once quartered, any broken or tapered ends of the quartered lengths are cut, to square them off. Before the lengths of quartered core are cut to produce the pieces for the JK Drop-Weight testing, each one is weighed in air and then in water, to obtain a density measurement and a measure of its mass per unit length. The size fraction targeted when the cut core method is used depends on the original core diameter. The target size fraction is selected to ensure that pieces of the correct volume will have chunky rather than slabby proportions. JKTech Job No. 1217/P1 6

203 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold Having measured the density of the core, the target volume can be translated into a target mass and with the average mass per unit length also known, an average cutting interval can be determined for the core. Sufficient pieces of the quartered core are cut to generate 1 particles. These are then divided into the five sets of 2 and broken in the JK Drop-Weight tester at the five different energy levels. Within each set, the three possible orientations of the particles are equally represented (as far as possible, given that there are 2 particles). The orientations prescribed for testing are shown in Figure 3. Figure 3 Orientations of Pieces for Breakage (Cut Core Method) The cut core method cannot be used for cores with diameters exceeding 7 mm, where the particle masses would be too large to achieve the highest prescribed energy level. 2.4 SMC TEST RESULTS The SMC Test results for sample Master Composite 2 from Goliath Gold Project are given in Table 1. This table includes the average rock density and the JK Drop- Weight index that is the direct result of the test procedure, plus the derived estimates of parameters A, b and t a that are required for JKSimMet comminution modelling. The values determined for the M ia, M ih and M ic parameters developed by SMCT are also presented in this table. The M ia parameter represents the coarse particle component (down to 75 µm), of the overall comminution energy and can be used together with the M ib (fine particle component) to estimate the total energy requirements of a conventional comminution circuit. The use of these parameters is explained further in APPENDIX B. In the case of the Master Composite 2 sample from Goliath Gold Project, the A and b estimates are based on a correlation using the database of all results so far accumulated by SMCT. JKTech Job No. 1217/P1 7

204 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold Table 1 - SMC Test Results Sample Designation DWi DWi Mia Mih Mic A b SG t a kwh/m 3 % kwh/t kwh/t kwh/t Master Composite Note: For more details on how the M ia, M ih and M ic parameters are derived and used, see APPENDIX B or go to the SMC Testing website at and click on the link to download Steve Morrell s paper on this subject. The influence of particle size on the specific comminution energy needed to achieve a particular t 1 value can also be inferred from the SMC Test results. The energy requirements for three particle sizes, each crushed to three different t 1 values, are presented in Table 2. Table 2 Energy Requirements Related to Particle Size Particle Size (mm) Sample Designation t 1 Values for Given Specific Energies (%) kwh/t kwh/t kwh/t kwh/t kwh/t kwh/t kwh/t kwh/t kwh/t Master Composite The SMC Test database now contains over 11, test results on samples representing more than 6 different deposits worldwide. Around 99% of the DWi values lie in the range.5 to14. kwh/m 3, with soft ores being at the low end of this range and hard ores at the high end. A cumulative graph of DWi values from the SMC Test Database is shown in Figure 4 below. This graph can be used to compare the DWi of the material from Goliath Gold Project, with the entire population of ores in the SMCT database. The figures on the y-axis of the graph represent the percentages of all ores tested that are softer than the x-axis (DWi) value selected. JKTech Job No. 1217/P1 8

205 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold % of tests DW i Figure 4 Cumulative Distribution of DWi Values in SMC Test Database A further cumulative distribution graph is provided in Figure 5 to allow a comparison of the M ia, M ih and M ic values obtained for the Goliath Gold Project material, with the entire population of values for these parameters contained in the SMCT database % of tests M ia M ih M ic kwh/t Figure 5 - Cumulative Distribution of M ia, M ih and M ic Values in the SMCT Database The value of A*b, which is also a measure of resistance to impact breakage, is calculated and presented in Table 3 along with indicators of how each A*b value compares with the accumulated values in the JK Drop-Weight database (from full JK Drop-Weight testing). These indicators are the Category (eg soft etc), the Rank (how many out of 3,747 recordings in database are harder) and the percent of database values that are harder. Note that in contrast to the DWi, a high value of A*b means that an ore is soft whilst a low value means that it is hard. JKTech Job No. 1217/P1 9

206 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold Table 3 Derived Values for A*b and t1 at 1 kwh/t Sample Designation A*b 1 kwh/t Value Category Rank % Value Category Rank % Master Composite 2 5. medium % 34.9 medium % The calculated value of t 1 at an E cs of 1 kwh/t is also shown in Table 3. This is again accompanied by Category, Rank and the percent of values in the database that are harder, so each can be seen against the yard-stick of all other samples in the JKTech database. The derived A*b value is 5., while the t 1 at 1 kwh/t value is In Figure 6 and Figure 7 below, histogram style frequency distributions for the A*b values and for the t 1 at 1 kwh/t values in the JKTech DW database are shown respectively. JKTech Job No. 1217/P1 1

207 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold A x b - JKTech Database Frequency Axb Figure 6 - Frequency Distribution of A*b in the JKTech Database 35 1 kwh/t - JKTech Database 3 25 Frequency kwh/t Figure 7 - Frequency Distribution of t in the JKTech Database JKTech Job No. 1217/P1 11

208 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold 3 REFERENCES Andersen, J. and Napier-Munn, T.J., 1988, Power Prediction for Cone Crushers", Third Mill Operators' Conference, Aus.I.M.M (Cobar, NSW), May 1988, pp Leung, K "An Energy-Based Ore Specific Model for Autogenous and Semi-Autogenous Grinding Mills." Ph.D. Thesis. University of Queensland (unpublished) Leung, K., Morrison, R.D. and Whiten, W.J., "An Energy Based Ore Specific Model for Autogenous and Semi-autogenous Grinding", Copper 87, Vina del Mar, Vol. 2, pp Morrell, S "Power Draw of Wet Tumbling Mills and Its Relationship to Charge Dynamics - Parts I and II", Transaction Inst. Min. Metall. (Sect C: Mineral Process Extr. Metall.), 15, 1996, pp C43-C62 Levin, J., Observation on the bond standard grindability test, and a proposal for a standard grindability test for fine materials. SAIMM 89 (1), Bond, F.C., "Crushing and Grinding Calculations Parts I and II", British Chemical Engineering, Vol 6, Nos 6 and 8 Daniel, M.J., 22, HPGR Model verification and scale up, Masters Thesis, University of Queensland, Australia Daniel, M. J. and Morrell, S., 24, HPGR model verification and scale-up, Elsevier, Minerals Engineering 17 (24) , May (24) Morrell, S., 27, A method for predicting the specific energy requirement of comminution circuits and assessing their energy utilisation efficiency Shi, F. and Kojovic, T. (27). Validation of a model for impact breakage incorporating particle size effect. Int. Journal of Mineral Processing, 82, Walters, S., and Kojovic, T. (26). Geometallurgical Mapping and Mine Modelling (GEMIII) the way of the future. Proc SAG 26, Vancouver, Vol IV, JKTech Job No. 1217/P1 12

209 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold 4 DISCLAIMER Warranty by JKTech a. JKTech will use its best endeavours to ensure that all documentation, data, recommendations, information, advice and reports ( Material ), provided by JKTech to the client ( Recipient ), is accurate at the time of providing it. Extent of Warranty by JKTech b. JKTech does not make any representations as to any matter, fact or thing that is not expressly provided for in the Material. c. JKTech does not give any warranty, nor accept any liability in connection with the Material, except to the extent, if any, required by law or specifically provided in writing by JKTech to the Recipient. d. JKTech will not be liable to the Recipient for any claims relating to Material in any language other than in English. e. If, apart from this Disclaimer, any warranty would be implied whether by law, custom or otherwise, that warranty is to the full extent permitted by law excluded. f. The Recipient will promptly advise JKTech in writing of any losses, damages, compensation, liabilities, amounts, monetary and non-monetary costs and expenses ( Losses ), incurred or likely to be incurred by the Recipient or JKTech in connection with the Material, and any claims, actions, suits, demands or proceedings ( Liabilities ) which the Recipient or JKTech may become liable in connection with the Material. Indemnity and Release by the Recipient g. The Recipient indemnifies, releases, discharges and saves harmless, JKTech against any and all Losses and Liabilities, suffered or incurred by JKTech, whether under the law of contract, tort, statutory duty or otherwise as a result of: i) the Recipient relying on the Material; ii) any liability for infringement of a third party's trade secrets, proprietary or confidential information, patents, registered designs, trademarks or names, copyright or other protected rights; and iii) any act or omission of JKTech, any employee, agent or permitted sub-contractor of JKTech in connection with the Material. Limit of Liability h. JKTech s liability to the Recipient in connection with the Material, whether under the law of contract, tort, statutory duty or otherwise, will be limited to the lesser of: i) the total cost of the job; or ii) JKTech providing amended Material rectifying the defect. Exclusion of Consequential Loss i. JKTech is not liable to the Recipient for any consequential, special or indirect loss (loss of revenue, loss of profits, business interruption, loss of opportunity and legal costs and disbursements), in connection with the Material whether under the law of contract, tort, statutory duty or otherwise. Defects j. The Recipient must notify JKTech within seven days of becoming aware of a defect in the Material. To the extent that the defect is caused by JKTech s negligence or breach of contract, JKTech may, at its discretion, rectify the defect. JKTech Job No. 1217/P1 13

210 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold Duration of Liability k. After the expiration of one year from the date of first providing the Material to the client, JKTech will be discharged from all liability in connection with the Material. The Recipient (and persons claiming through or under the Recipient) will not be entitled to commence any action, claim or proceeding of any kind whatsoever after that date, against JKTech (or any employee of JKTech) in connection with the Material. Contribution l. JKTech s liability to the Recipient for any loss or damage, whether under the law of contract, tort, statutory duty or otherwise will be reduced to the extent that an act or omission of the Recipient, its employees or agents, or a third party to whom the Recipient has disclosed the Material, contributed to the loss or damage. Severability m. If any provision of this Disclaimer is illegal, void, invalid or unenforceable for any reason, all other provisions which are self-sustaining and capable of separate enforcement will, to the maximum extent permitted by law, be and continue to be valid and enforceable. JKTech Job No. 1217/P1 14

211 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold APPENDICES JKTech Job No. 1217/P1 15

212 SMC Test Report on A Single Sample from Goliath Gold Project APPENDIX A. BACKGROUND TO THE SMC TEST Goliath Gold A 1 HOW THE SMC TEST RESULTS ARE USED The SMC Test generates a relationship between specific input energy (kwh/t) and the percent of broken product passing a specified sieve size. The results are used to determine the JK Drop-Weight index (DWi), which is a measure of the strength of the rock when broken under impact conditions. The DWi is directly related to the JK rock breakage parameters A and b and hence can be used to estimate the values of these parameters. Provision of a relatively low cost method of estimating the A and b parameters opens the possibility of incorporating these data into mine and mill planning operations. However a number of full JK Drop-Weight tests is still recommended for any particular orebody, to ensure that an accurate correlation between the DWi and the A and b parameters is available. The number of full JK Drop-Weight tests required for a given orebody will depend on its variability and should at least cover the major recognised ore types. The A and b parameters are used in AG/SAG mill models, such as those in JKSimMet, for predicting how the rock will break inside the mill. From this description the models can predict what the throughput, power draw and product size distribution will be (Napier-Munn et al (1996)). Modelling also enables a detailed flowsheet to be built up of the comminution circuit response to changes in ore type. It also allows optimisation strategies to be developed to overcome any deleterious changes in circuit performance predicted from differences in ore type when such changes are indicated by the SMC Test. These strategies can include both changes to how mills are operated (eg ball load, speed etc) and changes to feed size distribution through modification of blasting practices and primary crusher operation (mine-to-mill). The mine to mill models require information on rock mass competence such as provided by the point load index. The DWi is correlated with the point load index and hence can also be used in blast fragmentation modelling where direct measurements of point load index are not available. The DWi is related to the resistance of a rock to breakage under impact. SMCT has developed a series of equations that relate the DWi to the specific energy (kwh/t) requirements of complete AG and SAG mill circuits. These equations take into consideration factors such as ball charge, feed size, aspect ratio, whether the mill is operated with or without a pebble crusher and whether it is closed with a fine classifier such as a cyclone. The ability of these equations to predict AG/SAG mill circuit specific energy is illustrated in App Figure 1. The data shown cover 19 different operations and include Cu, Au, Ni and Pb/Zn ores. JKTech Job No. 1217/P1 16

213 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold App Figure 1 - Mill Power Prediction Based on DWi It should be noted that the parameter ta, which is the parameter representing the low energy abrasion component of breakage, is not yielded by the SMC Test. This parameter is derived from a tumbling test that is carried out as part of the full JK Drop-Weight test. The fact that it is also required as an input to the JKSimMet SAG/AG models provides a further reason for ensuring that some full JK Drop- Weight tests are also performed to represent at least the main rock types of an orebody. A 2 IMPACT COMMINUTION THEORY When a rock fragment is broken, the degree of breakage can be characterised by the t1 parameter. The t1 value is the percentage of the original rock mass that passes a screen aperture one tenth of the original rock fragment size. This parameter allows the degree of breakage to be compared across different starting sizes. The specific comminution energy (Ecs) has the units kwh/t and is the energy applied during impact breakage. As the impact energy is varied, so does the t1 value vary in response. Higher impact energies produce higher values of t1, which of course means products with finer size distributions. The equation describing the relationship between the t1 and Ecs is given below. t 1 = A ( 1 - e -b.ecs ) As can be seen from this equation, there are two rock breakage parameters A and b that relate the t1 (size distribution index) to the applied specific energy (Ecs). These parameters are ore specific and are normally determined from a full JK Drop-Weight test. A typical plot of t1 vs Ecs from a JK Drop-Weight test is shown in App Figure 2. The relationship is characterised by the two-parameter equation above, where t1 is the dependent variable. JKTech Job No. 1217/P1 17

214 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold App Figure 2 - Typical t 1 v Ecs Plot The t1 can be thought of as a fineness index with larger values of t1 indicating a finer product size distribution. The value of parameter A is the limiting value of t1. This limit indicates that at higher energies, little additional size reduction occurs as the Ecs is increased beyond a certain value. A*b is the slope of the curve at zero input energy and is generally regarded as an indication of the strength of the rock, lower values indicating a higher strength. The A and b parameters can also be used with equation 1 to generate a table of Ecs values, given a range of t1 values. Such a table is used in crusher modelling to predict the power requirement of the crusher given a feed and a product size specification. The DWi can be used to estimate the JK rock breakage parameters A and b by utilizing the fact that there is usually a pronounced (and ore specific) trend to decreasing rock strength with increasing particle size. This trend is illustrated in App Figure 3 which shows a plot of A*b versus particle size for a number of different rock types. JKTech Job No. 1217/P1 18

215 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold A*b size (mm) oretype 1 oretype 2 oretype3 oretype 4 oretype 5 mean ore type 6 oretype7 ore type 8 App Figure 3 - Size Dependence of A*b for a Range of Ore Types In the case of a conventional JK Drop-Weight test these values are effectively averaged and a mean value of A and b is reported. The SMC Test uses a single size and makes use of relationships such as that shown in App Figure 3 to predict the A and b of the particle size that has the same value as the mean for a full JK Drop-Weight test. An example of this is illustrated in App Figure 4 - Predicted v Observed A*b where the observed values of the product A*b are plotted against those predicted using the DWi. Each of the data points in App Figure 4 is a result from a different ore type within an orebody. JKTech Job No. 1217/P1 19

216 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold App Figure 4 - Predicted v Observed A*b JKTech Job No. 1217/P1 2

217 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold APPENDIX B. USE OF THE Mia, Mib, Mih, Mic IN PREDICTING COMMINUTION CIRCUIT SPECIFIC ENERGY B 1 INTRODUCTION The following technical note describes the recently extended use of the SMC Test to include crushers and HPGRs in determining the overall specific energy demand of comminution circuits. It builds on previous work which included tumbling mills only and should be read in conjunction with an earlier technical note dated September 27 entitled Use of the SMC Test in Predicting Total Comminution Circuit Specific Energy as well as published papers: Morrell, 28a, 28b. This enhancement now enables the SMC Test to be used in conjunction with the Bond ball work index test to predict the specific energy of comminution circuits where such circuits include combinations of any of the following equipment: AG and SAG mills Ball mills Rod mills Crushers High pressure Grinding Rolls (HPGR) B 2 B 2.1 EQUATIONS General The approach divides comminution equipment into three categories: Tumbling mills, eg AG, SAG, rod and ball mills Conventional reciprocating crushers, eg jaw, gyratory and cone HPGRs Tumbling mills are described using 2 indices: M ia and M ib Crushers have one index: M ic HPGRs have one index: M ih For tumbling mills the 2 indices relate to coarse and fine ore properties plus an efficiency factor which represents the influence of a pebble crusher in AG/SAG mill circuits. Coarse in this case is defined as spanning the size range from a P 8 of 75 µm up to the P 8 of the product of the last stage of crushing or HPGR size reduction prior to grinding. Fine covers the size range from a P 8 of 75 µm down to P 8 sizes typically reached by conventional ball milling, ie about 45 µm. The choice of 75 µm as the division between coarse and fine particle sizes was determined during the development of the technique and was found to give the best overall results across the range of plants in SMCT s database. Implicit in the approach is that distributions are parallel and linear in log-log space. JKTech Job No. 1217/P1 21

218 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold The work index covering grinding in tumbling mills of coarse sizes is labelled M ia. The work index covering grinding of fine particles is labelled M ib. M ia values are provided as a standard output from a SMC Test (Morrell, 24 a ) whilst M ib values can be determined using the data generated by a conventional Bond ball mill work index test (M ib is NOT the Bond ball work index). M ic and M ih values are also provided as a standard output from a SMC Test. The general size reduction equation is as follows (Morrell, 24 b ): f 2 W M 4 x i Where: i x f x 2 x 1 1 (1) M i = Work index related to the breakage property of an ore (kwh/tonne). For grinding from the product of the final stage of crushing to a P 8 of 75 µm (coarse particles) the index is labelled M ia and for size reduction from 75 µm to the final product P 8 normally reached by conventional ball mills (fine particles) it is labelled M ib. For conventional crushing M ic is used and for HPGRs M ih is used. W i = Specific comminution (kwh/tonne) x 2 = 8% passing size for the product (µm) x 1 = 8% passing size for the feed (µm) f(x j ) = -( x j /1) (Morrell, 26) (2) For tumbling mills the specific comminution energy (Wi) relates to the power at the pinion or for gearless drives - the motor output. For HPGRs it is the energy inputted to the rolls, whilst for conventional crushers Wi relates to the specific energy as determined using the motor input power less the no-load power. B 2.2 Specific Energy Determination for Comminution Circuits The total specific energy (W T ) to reduce in size primary crusher product to final product is given by: W T = W a +W b +W c +W h +W s (3) Where: W a = specific energy to grind coarser particles in tumbling mills W b = specific energy to grind finer particles in tumbling mills W c = specific energy for conventional crushing W h = specific energy for HPGRs W s = specific energy correction for size distribution Clearly only the W values associated with the relevant equipment in the circuit being studied are included in equation 3. JKTech Job No. 1217/P1 22

219 SMC Test Report on A Single Sample from Goliath Gold Project B Tumbling mills For coarse particle grinding in tumbling mills equation 1 is written as: W a K M 1 ia 4 x f 2 x f x 2 x 1 1 (4) Goliath Gold Where: K 1 = 1. for all circuits that do not contain a recycle pebble crusher and.95 where circuits do have a pebble crusher x 1 = P 8 (µm) of the product of the last stage of crushing before grinding x 2 = 75 µm M ia = Coarse ore work index and is provided directly by SMC Test For fine particle grinding equation 1 is written as: W b M ib 4 x f 3 x f x 3 x 2 2 (5) Where: x 2 = 75 µm x 3 = P 8 (µm) of final grind M ib = Provided by data from the standard Bond ball work index test using the following equation (Morrell, 26): M ib P f ( p8 ) f ( f8 ) Gbp p f 8 8 (6) Where: M ib = fine ore work index (kwh/tonne) P 1 = closing screen size (µm) Gbp = net grams of screen undersize per mill revolution p 8 = 8% passing size of the product (µm) f 8 = 8% passing size of the feed (µm) Note that the Bond ball work index test should be carried out with a closing screen size chosen to give a final product P 8 similar to that intended for the full-scale circuit. B Conventional Crushers Equation 1 for conventional crushers is written as: JKTech Job No. 1217/P1 23

220 SMC Test Report on A Single Sample from Goliath Gold Project W c K 2Mic4 x f 2 x f x 2 x 1 1 (7) Goliath Gold K 2 = 1. for all crushers operating in closed circuit with a classifying screen. If the crusher is in open circuit, eg pebble crusher in a AG/SAG circuit, K2 takes the value of x 1 = P 8 (µm) of the circuit feed x 2 = P 8 (µm) of the circuit product M ic = Crushing ore work index and is provided directly by SMC Test B HPGR Equation 1 for conventional crushers is written as: W h K 3Mih4 x f 2 x f x 2 x 1 1 (8) K 3 = 1. for all HPGRs operating in closed circuit with a classifying screen. If the HPGR is in open circuit, K3 takes the value of x 1 = P 8 (µm) of the circuit feed x 2 = P 8 (µm) of the circuit product M ih = HPGR ore work index and is provided directly by SMC Test B Specific Energy Correction for Size Distribution (Ws) Implicit in the approach described in this paper is that the feed and product size distributions are parallel and linear in log-log space. Where they are not, allowances (corrections) need to be made. By and large, such corrections are most likely to be necessary (or are large enough to be warranted) when evaluating circuits in which closed circuit secondary/tertiary crushing is followed by ball milling. This is because such crushing circuits tend to produce a product size distribution which is relatively steep when compared to the ball mill circuit cyclone overflow. This is illustrated in App Figure 5, which shows measured distributions from an open and closed crusher circuit as well as a ball mill cyclone overflow. The closed circuit crusher distribution can be seen to be relatively steep compared with the open circuit crusher distribution and ball mill cyclone overflow. Also the open circuit distribution more closely follows the gradient of the cyclone overflow. If a ball mill circuit were to be fed 2 distributions, each with same P 8 but with the open and closed circuit gradients in App Figure 5, the closed circuit distribution would require more energy to grind to the final P 8. How much more energy is required is difficult to determine. However, for the purposes of this approach it has been assumed that the additional specific energy for ball milling is the same as the difference in specific energy between open and closed crushing to reach the nominated ball mill feed size. This assumes that a crusher would provide this energy. However, in this situation the ball mill has to supply this energy and it has a different (higher) work index than the crusher (ie the ball mill is less energy efficient than a crusher and has to input more energy to do the same amount of size reduction). Hence from equation 7, to crush to the ball mill circuit feed size (x 2 ) in open circuit requires specific energy equivalent to: JKTech Job No. 1217/P1 24

221 SMC Test Report on A Single Sample from Goliath Gold Project W c 1.19* M ic 4 x f 2 x f x 2 x For closed circuit crushing the specific energy is: W c 1* M ic 4 x f 2 1 x f x 2 x (9) Goliath Gold (1) The difference between the two (eq 9 eq 1) has to be provided by the milling circuit with an allowance for the fact that the ball mill, with its lower energy efficiency, has to provide it and not the crusher. This is what is referred to in equation 3 as W s and for the above example is therefore represented by: W.19* M s ia 4 x f 2 x f x 2 x 1 1 Note that in equation 11 M ic has been replaced with M ia, the coarse particle tumbling mill grinding work index. In AG/SAG based circuits the need for W s appears to be unnecessary as App Figure 6 illustrates. Primary crusher feeds often have the shape shown in App Figure 6 and this has a very similar gradient to typical ball mill cyclone overflows. A similar situation appears to apply with HPGR product size distributions, as illustrated in App Figure 7. Interestingly SMCT s data show that for HPGRs, closed circuit operation appears to require a lower specific energy to reach the same P 8 as in open circuit, even though the distributions for open and closed circuit look to have almost identical gradients. Closer examination of the distributions in fact shows that in closed circuit the final product tends to have slightly less very fine material, which may account for the different energy requirements between the two modes of operation. It is also possible that recycled material in closed circuit is inherently weaker than new feed, as it has already passed through the HPGR previously and may have sustained micro-cracking. A reduction in the Bond ball mill work index as measured by testing HPGR products compared it to the Bond ball mill work index of HPGR feed has been noticed in many cases in the laboratory (see next section) and hence there is no reason to expect the same phenomenon would not affect the recycled HPGR screen oversize. It follows from the above arguments that in HPGR circuits, which are typically fed with material from closed circuit secondary crushers, a similar feed size distribution correction should also be applied. However, as the secondary crushing circuit uses such a relatively small amount of energy compared to the rest of the circuit (as it crushes to a relatively coarse size) the magnitude of size distribution correction is very small indeed much smaller than the error associated with the technique - and hence may be omitted in calculations. (11) JKTech Job No. 1217/P1 25

222 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold 1 % passing closed circuit crusher open circuit crusher cyc overflow size (mm) App Figure 5 Examples of Open and Closed Circuit Crushing Distributions Compared with a Typical Ball Mill Cyclone Overflow Distribution 1 % passing primary crusher prod cyc overflow size (mm) JKTech Job No. 1217/P1 26

223 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold App Figure 6 Example of a Typical Primary Crusher (Open and Circuit) Product Distribution Compared with a Typical Ball Mill Cyclone Overflow Distribution 1 % passing closed circuit hpgr open circuit hpgr cyc overflow size (mm) App Figure 7 Examples of Open and Closed Circuit HPGR Distributions Compared with a Typical Ball Mill Cyclone Overflow Distribution B Weakening of HPGR Products As mentioned in the previous section, laboratory experiments have been reported by various researchers in which the Bond ball work index of HPGR products is less than that of the feed. The amount of this reduction appears to vary with both material type and the pressing force used. Observed reductions in the Bond ball work index have typically been in the range -1%. In the approach described in this paper no allowance has been made for such weakening. However, if HPGR products are available which can be used to conduct Bond ball work index tests on then M ib values obtained from such tests can be used in equation 5. Alternatively the M ib values from Bond ball mill work index tests on HPGR feed material can be reduced by an amount that the user thinks is appropriate. Until more data become available from full scale HPGR/ball mill circuits it is suggested that, in the absence of Bond ball mill work index data on HPGR products, the M ib results from HPGR feed material are reduced by no more than 5% to allow for the effects of micro-cracking. B 3 B 3.1 VALIDATION Tumbling Mill Circuits The approach described in the previous section was applied to 65 industrial data sets. The results are shown in App Figure 8. In all cases, the specific energy relates to the tumbling mills contributing to size reduction from the product of the final stage of crushing to the final grind. Data are presented in terms of equivalent specific energy at the pinion. In determining what these values were on each of the plants in the data base it was assumed that power at the pinion was 93.5% of the measured JKTech Job No. 1217/P1 27

224 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold gross (motor input) power, this figure being typical of what is normally accepted as being reasonable to represent losses across the motor and gearbox. For gearless drives (so-called wrap-around motors) a figure of 97% was used observed kwh/t abc sabc ab sab ss ag ss sag crush ball rod ball predicted kwh/t App Figure 8 Observed vs Predicted Tumbling Mill Specific Energy B 3.2 Conventional Crushers Validation of equation 1 used 1 different crushing circuits (18 data sets), including secondary, tertiary and pebble crushers in AG/SAG circuits. Observed vs predicted specific energies are given in App Figure 9. The observed specific energies were calculated from the crusher throughput and the net power draw of the crusher as defined by: Net Power = Motor Input Power No Load Power (12) No-load power tends to be relatively high in conventional crushers and hence net power is significantly lower than the motor input power. From examination of the 18 crusher data sets the motor input power was found to be on average 35% higher than the net power. JKTech Job No. 1217/P1 28

225 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold y =.9981x R 2 = observed (kwh/t) predicted (kwh/t) App Figure 9 Observed vs Predicted Conventional Crusher Specific Energy B 3.3 HPGRs Validation of equation 1 for HPGRs used data from 18 different circuits (35 data sets) including laboratory, pilot and industrial scale equipment. Observed vs predicted specific energies are given in App Figure 1. The data relate to HPGRs operating with specific grinding forces typically in the range N/mm 2. The observed specific energies relate to power delivered by the roll drive shafts. Motor input power for full scale machines is expected to be 8-1% higher. JKTech Job No. 1217/P1 29

226 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold y = 1.6x R 2 =.9514 Observed (kwh/t) Predicted (kwh/t) App Figure 1 Observed vs Predicted HPGR Specific Energy B 4 WORKED EXAMPLES A SMC Test and Bond ball work index test were carried out on a representative ore sample. The following results were obtained: SMC Test: M ia = 19.4 kwh/t M ic = 7.2 kwh/t M ih = 13.9 kwh/t Bond test carried out with a 15 micron closing screen: M ib = 18.8 kwh/t Three circuits are to be evaluated: SABC HPGR/ball mill Conventional crushing/ball mill The overall specific grinding energy to reduce a primary crusher product with a P 8 of 1 mm to a final product P 8 of 16 µm needs to be estimated. B 4.1 SABC Circuit Coarse particle tumbling mill specific energy JKTech Job No. 1217/P1 3

227 SMC Test Report on A Single Sample from Goliath Gold Project Combining eq 2 and 4: W a.95*19.4*4* 75 ( /1) 1 (.295 1/1 Goliath Gold = 9.6 kwh/t Fine particle tumbling mill specific energy Combining eq 2 and 5: W b 18.8*4* 16 ( /1) 75 ( /1 = 8.4 kwh/t Pebble crusher specific energy In this circuit, it is assumed that the pebble crusher feed P 8 is 52.5mm. As a rule of thumb this value can be estimated by assuming that it is.75 of the nominal pebble port aperture (in this case the pebble port aperture is 7mm). The pebble crusher is set to give a product P 8 of 12mm. The pebble crusher feed rate is expected to be 25% of new feed tph. Combining eq 2 and 7: W c 1.19*7.2*4* 12 ( /1) 525 ( /1 = 1.12 kwh/t when expressed in terms of the crusher feed rate = 1.12 *.25 kwh/t when expressed in terms of the SABC circuit new feed rate =.3 kwh/t of SAG mill circuit new feed Total net comminution specific energy: From eq 3: W T = kwh/t = 18.3 kwh/t B 4.2 HPGR/Ball Milling Circuit In this circuit primary crusher product is reduced to a HPGR circuit feed P 8 of 35 mm by closed circuit secondary crushing. The HPGR is also in closed circuit and reduces the 35 mm feed to a circuit product P 8 of 4 mm. This is then fed to a closed circuit ball mill which takes the grind down to a P 8 of 16 µm. Secondary crushing specific energy Combining eq 2 and 7: W c 1*7.2*4* 35 ( /1) 1 (.295 1/1 JKTech Job No. 1217/P1 31

228 SMC Test Report on A Single Sample from Goliath Gold Project =.6 kwh/t Goliath Gold HPGR specific energy Combining eq 2 and 8: W c 1*13.9*4* 4 ( /1) 35 ( /1 = 2.9 kwh/t Coarse particle tumbling mill specific energy Combining eq 2 and 4: W a 1*19.4*4* 75 ( /1) 4 ( /1 = 4.5 kwh/t Fine particle tumbling mill specific energy Combining eq 2 and 5: W b 18.8*4* 16 ( /1) 75 ( /1 = 8.4 kwh/t Total net comminution specific energy: From eq 3: W T = kwh/t = 16.4 kwh/t B 4.3 Conventional Crushing/Ball Milling Circuit In this circuit primary crusher product is reduced in size to P 8 of 6.5 mm via a secondary/tertiary crushing circuit (closed). This is then fed to a closed circuit ball mill which grinds to a P8 of 16 µm. Secondary/tertiary crushing specific energy Combining eq 2 and 7: W c 1*7.2*4* 65 ( /1) 1 ( /1 = 1.7 kwh/t Coarse particle tumbling mill specific energy Combining eq 2 and 4: JKTech Job No. 1217/P1 32

229 SMC Test Report on A Single Sample from Goliath Gold Project W a 1*19.4*4* 75 ( /1) 65 ( /1 Goliath Gold = 5.5 kwh/t Fine particle tumbling mill specific energy Combining eq 2 and 5: W b 18.8*4* 16 ( /1) 75 ( /1 = 8.4 kwh/t Size distribution correction W s.19*19.4*4* 65 ( /1) 1 (.295 1/1 =.9 kwh/t Total net comminution specific energy: From eq 3: W T = kwh/t = 16.5 kwh/t B 5 REFERENCES Morrell, S., 24 a. Predicting the Specific Energy of Autogenous and Semiautogenous Mills from Small Diameter Drill Core Samples. Minerals Engineering, Vol 17/3 pp Morrell, S., 24 b. An Alternative Energy-Size Relationship To That Proposed By Bond For The Design and Optimisation Of Grinding Circuits. International Journal of Mineral Processing, 74, Morrell, S., 26. Rock Characterisation for High Pressure Grinding Rolls Circuit Design, Proc International Autogenous and Semi Autogenous Grinding Technology,Vancouver, vol IV pp Morrell,S., 28a, A method for predicting the specific energy requirement of comminution circuits and assessing their energy utilisation efficiency, Minerals Engineering, Vol. 21, No. 3. Morrell,S., 28b, Predicting the Overall Specific Energy Requirements of AG/SAG, Ball Mill and HPGR Circuits on the Basis of Small-Scale Laboratory Ore Characterisation Tests, Proceedings Procemin Conference, Santiago, Chile Stephenson, I.;1997, The downstream effects of high pressure grinding rolls processing, PhD Thesis, Julius Kruttschnitt Mineral Research Centre, Department of Mining and Metallurgical Engineering, University of Queensland. JKTech Job No. 1217/P1 33

230 SMC Test Report on A Single Sample from Goliath Gold Project Goliath Gold Schonert, K., Advances in comminution fundamental, and impacts on technology. XVII International Mineral Processing Congress, Dresden, Volume 1,: pp Shi, F., Lambert, S., Daniel, M.J., 26, Measurement of the effect of HPGR treating platinum ores. SAG 26, Vancouver, September 26. JKTech Job No. 1217/P1 34

231 APPENDIX V KM346 SPECIAL DATA

232 INDEX TABLE PAGE V-1 Replicate Head Assay Data 1 V-2 KM346-A Master Composite 3 2 V-3 KM346-B Master Composite 3 3 V-4 KM346-C Master Composite 3 4 V-5 KM346-D Master Composite 3 5 V-6 Specific Gravity Test 8 Thickened Tail 6 V-7 Flocculant Test Work Master Composite 3 7 V-8 Viscosity Test Report Master Composite 3 8 REFERENCE ALS Minerals CertificateVA12971

233 1 TABLE V-1 REPLICATE HEAD ASSAY DATA Sample Assays - percent or g/tonne Ag As S S(s) C TOC Hg Sb Au Au R/A Au R/A Master Composite 2 Head Master Composite 2 Head 1 duplicate Average Master Composite 3 Head Master Composite 3 Head Average Variability Composite Variability Composite Variability Composite Variability Composite Variability Composite Variability Composite Variability Composite Variability Composite Variability Composite Variability Composite Note: Ag, Au, and Hg are reported in g/tonne, all others are reported in percent.

234 2 TABLE V-2 KM346-A Master Composite 3 SETTLING DATA TEST CONDITIONS Elapsed Interface Interface Solids S.G Time (min) Height (ml) Height (mm) Solids Weight (g) 15 Solids Volume (ml) ph ( as tested ) ph modifier (g/t) Flocculant Type Superfloc C Flocculant ( g/t) Temperature (C) Slurry Volume (ml) Slurry S.G Final Slurry Volume Initial Percent Solids Final Percent Solids U/F Density - percent solids Note: Thickener area estimated using thetalmadge-fitch Method Notes: a) Cloudy after 7 minutes, fair after 1 minutes and clear after 2 minutes. b) Master Compostie 3 ground to a nominal 96µm. SETTLING RATE 4 Interface - millimetres Time - minutes

235 3 TABLE V-3 KM346-B Master Composite 3 SETTLING DATA TEST CONDITIONS Elapsed Interface Interface Solids S.G Time (min) Height (ml) Height (mm) Solids Weight (g) 15 Solids Volume (ml) ph ( as tested ) ph modifier (g/t) Flocculant Type Superfloc C Flocculant ( g/t) Temperature (C) Slurry Volume (ml) Slurry S.G Final Slurry Volume Initial Percent Solids Final Percent Solids U/F Density - percent solids Note: Thickener area estimated using thetalmadge-fitch Method SETTLING RATE Notes: a) Cloudy after 5 minutes, fair after 7 minutes and clear after 2 minutes. b) Master Compostie 3 ground to a nominal 96µm. Interface - millimetres Time - minutes

236 4 TABLE V-4 KM346-C Master Composite 3 SETTLING DATA TEST CONDITIONS Elapsed Interface Interface Solids S.G Time (min) Height (ml) Height (mm) Solids Weight (g) 15 Solids Volume (ml) ph ( as tested ) ph modifier (g/t) Flocculant Type Superfloc C Flocculant ( g/t) Temperature (C) Slurry Volume (ml) Slurry S.G Final Slurry Volume Initial Percent Solids Final Percent Solids U/F Density - percent solids Note: Thickener area estimated using thetalmadge-fitch Method SETTLING RATE Notes: a) Cloudy after 5 minutes, fair after 7 minutes, good after 1 minutes and clear after 2 minutes. b) Master Compostie 3 ground to a nominal 96µm. Interface - millimetres Time - minutes

237 5 TABLE V-5 KM346-D Master Composite 3 SETTLING DATA TEST CONDITIONS Elapsed Interface Interface Solids S.G Time (min) Height (ml) Height (mm) Solids Weight (g) 15 Solids Volume (ml) ph ( as tested ) ph modifier (g/t) Flocculant Type Superfloc C Flocculant ( g/t) Temperature (C) Slurry Volume (ml) Slurry S.G Final Slurry Volume Initial Percent Solids Final Percent Solids U/F Density - percent solids Note: Thickener area estimated using thetalmadge-fitch Method SETTLING RATE Notes: a) Cloudy after 4 minutes, good after 5 minutes and clear after 7 minutes. b) Master Compostie 3 ground to a nominal 96µm. Interface - millimetres Time - minutes

238 6 TABLE V-6 SPECIFIC GRAVITY Test 8 Thickened Tail Item Weight Flask + Methyl Hydrate Sample 1.7 Flask + Sample + Methyl H S.G. Methyl Hydrate.792 S.G. Sample 2.72 S.G. Factor.991

239 7 TABLE V-7 FLOCCULANT SCREENING AND SELECTION TEST WORK DATE: July 23, 212 PROJECT: KM346 PROCEDURE: To Determine the Best Flocculant to be Used for Settling Tests. SAMPLE: 1 g Master Composite 3 ground to a nominal 94mm K 8. WATER: Pre-treated to ph 11. PULP DENSITY: 33% solids (w/w) Flocculent Type: Superfloc A13 Superfloc C-496 Magnafloc 333 Magnafloc 156 Flocculent Dosage(g/t): Settling Time (seconds): Clarity: Clear Clear Clear Clear

240 8 TABLE V-8 VISCOSITY TEST REPORT - BHOLIN VISCO 88 DATE: July 24, 212 PROJECT NO: KM346 WATER: Kamloops Tap Water SAMPLE ID: Master Composite 3 ground to a nominal 94mm K 8. Sample Details System Number Dial Viscosity Viscosity Shear Rate Shear Torque Temp. Speed η η y Stress M (Pas) (cps) (s -1 ) (Pa) ( C) (mnm) Fresh Water % SOLIDS: ph: Fresh Water % SOLIDS: ph: Fresh Water % SOLIDS: ph:

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247 APPENDIX VI KM346 ADIS ANALYSIS DATA

248 INDEX TABLEPAGE 1 KM346 Test 1 Knelson Concentrate of Master Composite KM346 Test 6 Knelson Concentrate of Master Composite 3 8 PHOTOMICROGRAPHS 1 KM346 Test 1 Knelson Concentrate of Master Composite KM346 Test 6 Knelson Concentrate of Master Composite 3 12

249 1 TABLE 1A AVERAGE SIZE OF THE GOLD OCCURRENCES BY CLASS OF ASSOCIATION KM346 Test 1 Knelson Concentrate of Master Composite 2 Particles Observed Mode of Occurrence Average Projected Area Diameter - microns Area % Au Cs Ga Sp Py Po He Gn Gold 14 Liberated Gold Gold Copper Sulphide Adhesion Binary Gold Sphalerite Adhesion Binary Gold Pyrite Adhesion Binary Gold Pyrite Adhesion Inclusion Binary Gold Pyrite Inclusion Binary Gold Hematite Adhesion Binary Gold Gangue Adhesion Binary Gold Gangue Adhesion Inclusion Binary Gold Adhesion Multiphase Gold Inclusion Multiphase Notes: a) Au-Gold, Cs-Copper Sulphides including Chalcopyrite, Bornite, Chalcocite/Covellite and Enargite, Ga-Galena, Sp-Sphalerite, Py-Pyrite, Po-Pyrrhotite, He-Hematite, Gn-Gangue. b) Projected area diameter is the diameter of a circle in mineralogical terms. TABLE 1B AVERAGE COMPOSITION BY MASS OF THE GOLD OCCURRENCES BY CLASS OF ASSOCIATION KM346 Test 1 Knelson Concentrate of Master Composite 2 Particles Observed Mode of Occurrence Average Mass - Percent Au Cs Ga Sp Py Po He Gn 14 Liberated Gold Gold Copper Sulphide Adhesion Binary Gold Sphalerite Adhesion Binary Gold Pyrite Adhesion Binary Gold Pyrite Adhesion Inclusion Binary < Gold Pyrite Inclusion Binary Gold Hematite Adhesion Binary Gold Gangue Adhesion Binary Gold Gangue Adhesion Inclusion Binary Gold Adhesion Multiphase <1 < Gold Inclusion Multiphase 12 <1 <1 < Notes: a) Au-Gold, Cs-Copper Sulphides including Chalcopyrite, Bornite, Chalcocite/Covellite and Enargite, Ga-Galena, Sp-Sphalerite, Py-Pyrite, Po-Pyrrhotite, He-Hematite, Gn-Gangue. b) Mass data assumes particles are spherical in shape.

250 2 TABLE 1C DISTRIBUTION OF GOLD OCCURRENCES BY CLASS OF ASSOCIATION KM346 Test 1 Knelson Concentrate of Master Composite 2 Sample Cs Ga Sp Py Po He Gn Test 1 Knelson Concentrate Notes: a) Lib-Liberated, Cs-Copper Sulphides including Chalcopyrite, Bornite, Chalcocite/Covellite and Enargite, Ga-Galena, Sp-Sphalerite, Py-Pyrite, Po-Pyrrhotite, He-Hematite, Gn-Gangue, MP-Multiphase. Lib Locked in Binary With: MP TABLE 1D DISTRIBUTION OF GOLD MASS BY CLASS OF ASSOCIATION KM346 Test 1 Knelson Concentrate of Master Composite 2 Sample Lib. Locked in Binary With: Cs Ga Sp Py Po He Gn Test 1 Knelson Concentrate < <1 5 2 Notes: a) Lib-Liberated, Cs-Copper Sulphides including Chalcopyrite, Bornite, Chalcocite/Covellite and Enargite, Ga-Galena, Sp-Sphalerite, Py-Pyrite, Po-Pyrrhotite, He-Hematite, Gn-Gangue, MP-Multiphase. b) Mass data assumes particles are spherical in shape. MP TABLE 1E SUMMARY OF ADIS ANALYSIS OF GOLD KM346 Test 1 Knelson Concentrate of Master Composite 2 Parameter Size Fraction Number of Slides Scanned Number of Particles Scanned Total Surface Area of Particles Total Surface Area of Gold Estimated Volume of All Particles Estimated Volume of Gold Grains Number of Gold Occurrences Mean Projected Diameter of Gold Measured Gold Content Units Unsized x x 1 9 µm x 1 5 µm x 1 1 µm x 1 6 µm µm 116 g/t

251 3 TABLE 1F STATUS OF GOLD OCCURRENCES BY CLASS OF ASSOCIATION KM346 Test 1 Knelson Concentrate of Master Composite 2 Particle Mode of Occurrence Projected Area Diameter - microns Au Cp Bn Ch/Cv En Ga Sp Py Po He Gn 1 Liberated Gold Gold Gangue Adhesion Binary Gold Gangue Adhesion Inclusion Binary Liberated Gold Liberated Gold Liberated Gold Gold Inclusion Multiphase Gold Gangue Adhesion Binary Liberated Gold Liberated Gold Liberated Gold Liberated Gold Gold Pyrite Adhesion Binary Gold Adhesion Multiphase Gold Hematite Adhesion Binary Liberated Gold Liberated Gold Gold Inclusion Multiphase Gold Gangue Adhesion Binary Gold Adhesion Multiphase Gold Enargite Adhesion Binary Gold Pyrite Inclusion Binary Gold Inclusion Multiphase Gold Enargite Adhesion Binary Gold Adhesion Multiphase Gold Pyrite Adhesion Binary Gold Pyrite Inclusion Binary Gold Copper Sulphide Adhesion Binary Liberated Gold Gold Sphalerite Adhesion Binary Liberated Gold Gold Pyrite Adhesion Inclusion Binary Gold Pyrite Adhesion Binary Gold Inclusion Multiphase Gold Adhesion Multiphase Notes: a) Au-Gold, Cp-Chalcopyrite, Bn-Bornite, Ch/Cv-Chalcocite/Covellite, En-Enargite, Ga-Galena, Sp-Sphalerite, Py-Pyrite, Po-Pyrrhotite, He-Hematite, Gn-Gangue. b) Projected area diameter is the diameter of a circle in mineralogical terms. Area % Gold

252 4 TABLE 1F CONTINUED Particle Mode of Occurrence Projected Area Diameter - microns Area % Au Cp Bn Ch/Cv En Ga Sp Py Po He Gn Gold 36 Gold Copper Sulphide Adhesion Binary Gold Pyrite Inclusion Binary <1 38 Liberated Gold Liberated Gold Gold Adhesion Multiphase Notes: a) Au-Gold, Cp-Chalcopyrite, Bn-Bornite, Ch/Cv-Chalcocite/Covellite, En-Enargite, Ga-Galena, Sp-Sphalerite, Py-Pyrite, Po-Pyrrhotite, He-Hematite, Gn-Gangue. b) Projected area diameter is the diameter of a circle in mineralogical terms.

253 5 TABLE 1G STATUS OF GOLD OCCURRENCES BY MASS BY CLASS OF ASSOCIATION KM346 Test 1 Knelson Concentrate of Master Composite 2 Particle Mode of Occurrence Mass - Percent Au Cp Bn Ch/Cv En Ga Sp Py Po He Gn 1 Liberated Gold Gold Gangue Adhesion Binary Gold Gangue Adhesion Inclusion Binary Liberated Gold Liberated Gold Liberated Gold Gold Inclusion Multiphase 1 < < Gold Gangue Adhesion Binary <1 9 Liberated Gold Liberated Gold Liberated Gold Liberated Gold Gold Pyrite Adhesion Binary < Gold Adhesion Multiphase 19 < Gold Hematite Adhesion Binary Liberated Gold Liberated Gold Gold Inclusion Multiphase <1 19 Gold Gangue Adhesion Binary <1 2 Gold Adhesion Multiphase 1 < < Gold Enargite Adhesion Binary Gold Pyrite Inclusion Binary Gold Inclusion Multiphase < <1 24 Gold Enargite Adhesion Binary Gold Adhesion Multiphase Gold Pyrite Adhesion Binary Gold Pyrite Inclusion Binary Gold Copper Sulphide Adhesion Binary Liberated Gold Gold Sphalerite Adhesion Binary Liberated Gold Gold Pyrite Adhesion Inclusion Binary < Gold Pyrite Adhesion Binary Gold Inclusion Multiphase <1 < Gold Adhesion Multiphase < Notes: a) Au-Gold, Cp-Chalcopyrite, Bn-Bornite, Ch/Cv-Chalcocite/Covellite, En-Enargite, Ga-Galena, Sp-Sphalerite, Py-Pyrite, Po-Pyrrhotite, He-Hematite, Gn-Gangue. b) Mass data assumes particles are spherical in shape.

254 6 TABLE 1G CONTINUED Particle Mode of Occurrence Mass - Percent Au Cp Bn Ch/Cv En Ga Sp Py Po He Gn 36 Gold Copper Sulphide Adhesion Binary 82 - < Gold Pyrite Inclusion Binary < Liberated Gold Liberated Gold Gold Adhesion Multiphase < Notes: a) Au-Gold, Cp-Chalcopyrite, Bn-Bornite, Ch/Cv-Chalcocite/Covellite, En-Enargite, Ga-Galena, Sp-Sphalerite, Py-Pyrite, Po-Pyrrhotite, He-Hematite, Gn-Gangue. b) Mass data assumes particles are spherical in shape.

255 7 PHOTOMICROGRAPH 1 KM346 TEST 1 - KNELSON CONCENTRATE OF MASTER COMPOSITE 2 Particle 5 Particle 6 Area:2237µm 2 Area:195µm 2 Au Au Py Au Au Gn Particle 17 Particle 2 Area:7841µm 2 Ga Area:2958µm 2 Au Au Cp Particle 21 Particle 27 Py Area:951µm 2 Area:1µm 2 Au En Au Py Py *Au-Gold, Cp-Chalcopyrite, En-Enargite, Ga-Galena, Py-Pyrite, Gn-Gangue.

256 8 TABLE 2A AVERAGE SIZE OF THE GOLD OCCURRENCES BY CLASS OF ASSOCIATION KM346 Test 6 Knelson Concentrate of Master Composite 3 Particles Observed Mode of Occurrence Average Projected Area Diameter - microns Au Ac Cp Ga Py Po Gn 5 Liberated Gold Gold Galena Adhesion Binary Gold Pyrite Inclusion Binary Gold Gangue Adhesion Binary Gold Adhesion Multiphase Gold Inclusion Multiphase Gold Adhesion/Inclusion Multiphase Notes: a) Au-Gold including Electrum and Aurostibite, Ac-Acanthite/Argentite, Cp-Chalcopyrite, Ga-Galena, Py-Pyrite, Po-Pyrrhotite, Gn-Gangue. b) Projected area diameter is the diameter of a circle in mineralogical terms. Area % Gold TABLE 2B AVERAGE COMPOSITION BY MASS OF THE GOLD OCCURRENCES BY CLASS OF ASSOCIATION KM346 Test 6 Knelson Concentrate of Master Composite 3 Particles Observed Mode of Occurrence Average Mass - Percent Au Ac Cp Ga Py Po Gn 5 Liberated Gold Gold Galena Adhesion Binary < Gold Pyrite Inclusion Binary < Gold Gangue Adhesion Binary <1 4 Gold Adhesion Multiphase <1 3 Gold Inclusion Multiphase <1 2 1 Gold Adhesion/Inclusion Multiphase 12 - < Notes: a) Au-Gold including Electrum and Aurostibite, Ac-Acanthite/Argentite, Cp-Chalcopyrite, Ga-Galena, Py-Pyrite, Po-Pyrrhotite, Gn-Gangue. b) Mass data assumes particles are spherical in shape.

257 9 TABLE 2C DISTRIBUTION OF GOLD OCCURRENCES BY CLASS OF ASSOCIATION KM346 Test 6 Knelson Concentrate of Master Composite 3 Locked in Binary With: Sample Lib. MP Ac Cp Ga Py Po Gn KM346 Test 6 Knelson Concentrate Notes: a) Lib.-Liberated, Ac-Acanthite/Argentite, Cp-Chalcopyrite, Ga-Galena, Py-Pyrite, Po-Pyrrhotite, Gn-Gangue, MP-Multiphase. TABLE 2D DISTRIBUTION OF GOLD MASS BY CLASS OF ASSOCIATION KM346 Test 6 Knelson Concentrate of Master Composite 3 Sample Lib. Locked in Binary With: Cp Bn Ga Py Po Gn KM346 Test 6 Knelson Concentrate < Notes: a) Lib.-Liberated, Ac-Acanthite/Argentite, Cp-Chalcopyrite, Ga-Galena, Py-Pyrite, Po-Pyrrhotite, Gn-Gangue, MP-Multiphase. b) Mass data assumes particles are spherical in shape. MP TABLE 2E SUMMARY OF ADIS ANALYSIS OF GOLD KM346 Test 6 Knelson Concentrate of Master Composite 3 Parameter Size Fraction Number of Slides Scanned Number of Particles Scanned Total Surface Area of Particles Total Surface Area of Gold Estimated Volume of All Particles Estimated Volume of Gold Grains Number of Gold Occurrences Mean Projected Diameter of Gold Measured Gold Content Units Unsized x x 1 9 µm x 1 4 µm x 1 11 µm x 1 6 µm µm 88.9 g/t

258 1 TABLE 2F STATUS OF GOLD OCCURRENCES BY CLASS OF ASSOCIATION KM346 Test 6 Knelson Concentrate of Master Composite 3 Particle Mode of Occurrence Projected Area Diameter - microns Au Ac Cp Ga Py Po Gn 1 Gold Adhesion/Inclusion Multiphase Liberated Gold Liberated Gold Gold Gangue Adhesion Binary Gold Inclusion Multiphase Liberated Gold Gold Gangue Adhesion Binary Liberated Gold Gold Adhesion Multiphase Gold Galena Adhesion Binary Gold Adhesion Multiphase Gold Inclusion Multiphase Gold Adhesion Multiphase Liberated Gold Gold Pyrite Inclusion Binary Gold Pyrite Inclusion Binary <1 17 Gold Inclusion Multiphase Gold Adhesion Multiphase Notes: a) Au-Gold including Electrum and Aurostibite, Ac-Acanthite/Argentite, Cp-Chalcopyrite, Ga-Galena, Py-Pyrite, Po-Pyrrhotite, Gn-Gangue. b) Projected area diameter is the diameter of a circle in mineralogical terms. Area % Gold

259 11 TABLE 2G STATUS OF GOLD OCCURRENCES BY MASS BY CLASS OF ASSOCIATION KM346 Test 6 Knelson Concentrate of Master Composite 3 Particle Mode of Occurrence Mass - Percent Au Ac Cp Ga Py Po Gn 1 Gold Adhesion/Inclusion Multiphase 12 - < Liberated Gold Liberated Gold Gold Gangue Adhesion Binary <1 5 Gold Inclusion Multiphase Liberated Gold Gold Gangue Adhesion Binary <1 8 Liberated Gold Gold Adhesion Multiphase <1 1 Gold Galena Adhesion Binary < Gold Adhesion Multiphase < Gold Inclusion Multiphase <1 13 Gold Adhesion Multiphase Liberated Gold Gold Pyrite Inclusion Binary < Gold Pyrite Inclusion Binary < Gold Inclusion Multiphase < <1 <1 18 Gold Adhesion Multiphase Notes: a) Au-Gold including Electrum and Aurostibite, Ac-Acanthite/Argentite, Cp-Chalcopyrite, Ga-Galena, Py-Pyrite, Po-Pyrrhotite, Gn-Gangue. b) Mass data assumes particles are spherical in shape.

260 12 PHOTOMICROGRAPH 2 KM346 TEST 6 - KNELSON CONCENTRATE OF MASTER COMPOSITE 3 Particle 2 Particle 1 Area:8162µm 2 Area:88µm 2 Au Au Py Ga Particle 11 Particle 12 Area:421µm 2 Py Au Py Au Area:626µm 2 Ga Gn Particle 16 Particle 17 Au Area:186µm 2 Po Py Au Py Gn Py Area:43µm 2 Gn *Au-Gold, Ga-Galena, Py-Pyrite, Po-Pyrrhotite, Gn-Gangue.