QA/QC REPORT FOR RESAMPLING OF HISTORIC DRILL CORE. SIGNATURE RESOURCES LTD. Suite 200, 366 Bay Street Toronto, Ontario Canada M5H 4B2

Transcription

1 QA/QC REPORT FOR RESAMPLING OF HISTORIC DRILL CORE LINGMAN LAKE Lingman Lake Area, NW Ontario, Canada SIGNATURE RESOURCES LTD. Suite 200, 366 Bay Street Toronto, Ontario Canada M5H 4B2 Date: Feb. 13, 2017 Prepared By: CARACLE CREEK INTERNATIONAL CONSULTING INC. Julie Selway, Ph.D., P.Geo.

2 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. Office Locations Toronto, Ontario Tel: Robert Gordon This report has been prepared by Caracle Creek International Consulting Inc. (Caracle Creek) on behalf of Signature Resources Ltd. Vancouver Granville Street, Suite 1409 Vancouver, BC Canada, V6C 1T2 Tel: Stephen Wetherup Sudbury 1545 Maley Drive, Suite 2018 Sudbury, ON Canada, P3A 4R7 Tel: TF: Julie Selway Johannesburg 30, 7th Avenue Parktown North, Johannesburg Gauteng, South Africa Tel: (0) John Hancox Issued by: Sudbury Office February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 1 TORONTO VANCOUVER SUDBURY JOHANNESBURG

3 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. TABLE OF CONTENTS 1.0 SUMMARY INTRODUCTION INTRODUCTION TERMINOLOGY UNITS CARACLE CREEK QUALIFICATIONS SAMPLE PREPARATION, ANALYSES AND SECURITY SAMPLE SECURITY SAMPLE PREPARATION SAMPLE ANALYSIS DATA VERIFICATION QUALITY CONTROL Blanks Au standards Lab Pulp Duplicates Lab Preparation Duplicates Core Duplicates Historic vs Current Conclusions REFERENCES STATEMENT OF AUTHORSHIP FIGURES Figure 4-1 Control chart for blanks. Sample event vs Au (g/t) Figure 4-2 Control chart for low grade standard Oreas Figure 4-3 Control chart for medium grade standard Oreas Figure 4-4 Control chart for high grade standard Oreas Figure 4-5 Pulp duplicates: a) original vs pulp duplicates, b) pair mean vs absolute difference Au (g/t) February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 2 TORONTO VANCOUVER SUDBURY JOHANNESBURG

4 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. Figure 4-6 Preparation duplicates: a) original vs preparation duplicates, b) pair mean vs absolute difference Au (g/t) Figure 4-7 Historic vs current core duplicates TABLES Table 3-1 External standards certified values APPENDICES Appendix 1 Certificate of Analyses for Gold Standards February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 3 TORONTO VANCOUVER SUDBURY JOHANNESBURG

5 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. 1.0 SUMMARY Caracle Creek International Consulting Inc. ("Caracle Creek") of Toronto, Ontario, Canada was contracted by Signature Resources Ltd. ("Signature") of Toronto, Ontario, Canada, to complete a QA/QC review of the resampling of historic core from the Lingman Lake (the "Property"), and to prepare a QA/QC Report (the "Report"). The purpose of this resampling program is verification of historic drill core assays for future resource estimation calculations. The text from this Report will be inserted into a Junior Exploration Assistance Program (JEAP) Report for the Ontario Prospectors Association and other reports in the future. A total of 1427 samples were submitted to SGS preparation lab in Red Lake including: 1356 drill core, 36 blanks, 12 low grade Au standards, 12 medium grade Au standards and 11 high grade Au standards. Every 20 samples contained one blank and one Au standard. No core duplicates were cut during the 2016 sampling, as the core duplicates were the comparison of the historic and 2016 drill core sample assays. All of the blanks passed except for one sample (B60720) from drill hole which had 0.24 g/t Au. This blank likely was contaminated during pulverization. The failure rate of 2.8 % for the blanks is acceptable. All of the low, medium and high grade external standards passed indicating good accuracy. No bias was detected for the low grade and high grade standards. The assays for the medium grade standards are biased low. Sample mixups in the database were minimal. Three low grade standards were originally labelled as high grade standards in the logs, three medium grade standards were originally labelled as low grade standards in the logs, and three high grade standards were originally labelled as medium grade standards in the logs. The correct name was labelled in the sample tag book in all of these instances. The correction was made in the logs and the assay database and these samples passed. All of the pulp duplicates passed and the R 2 = All of the preparation duplicates passed and the R 2 = The pulp and preparation duplicates indicate good reproducibility of the assays. The historic Au assays vs the 2016 assay of the same interval of core (i.e., core duplicates) was used to compare the two sets of data and to test the reproducibility of the historic Au assays. A total of 450 core duplicate pairs were plotted of which 9 duplicate pairs were considered to be failed duplicates due to the significant difference between the two Au assays. The linear regression line through the passed duplicated has R 2 = The significant absolute pair difference is more likely due to gold nugget effect than analytical error, as the February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 4 TORONTO VANCOUVER SUDBURY JOHANNESBURG

6 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. dissimilar pairs are high grade Au samples with > 2 g/t Au. The dissimilar pairs represent 2.0% of the core duplicate pairs which the QP considers to be an excellent correlation between the historic and 2016 Au assays. In the Qualified Person s opinion, the assay data is adequate for the purpose of verification of historic drill core assays and for future resource estimation calculations. 2.0 INTRODUCTION 2.1 Introduction Caracle Creek International Consulting Inc. ("Caracle Creek") of Toronto, Ontario, Canada was contracted by Signature Resources Ltd. ("Signature") of Toronto, Ontario Canada, to complete a QA/QC review of the resampling of historic core from the Lingman Lake (the "Property"), and to prepare a QA/QC Report (the "Report"). The purpose of this resampling program is verification of historic drill core assays for future resource estimation calculations. The text from this Report will be inserted into a Junior Exploration Assistance Program (JEAP) Report for the Ontario Prospectors Association and other reports in the future. The Lingman Lake property is located approximately 325 km north of the town of Red Lake, just east of the Ontario-Manitoba boundary and on NTS Sheet 53F14. The property is situated at the west and north shore of Lingman Lake. The property was historically mined for gold and the shaft collar is located 1500 m north of the shoreline on patented claim Pa 6132 (Hanych and Racicot, 2013). The Lingman Lake patents host the Lingman Lake gold mine, an underground sub-structure that includes a m shaft which services three levels: at 46 m (150L), 84 m (275L) and 122 m (400L) depths (Hanych and Racicot, 2013). The Property is located in the Lingman greenstone belt of the Sachigo Subprovince (Hanych and Racicot, 2013). Gold mineralization at the Lingman Lake mine occurs in multiple zones that are structurally controlled by subparallel shears which tend to pinch and swell both along strike and down dip. Within these zones, the most favourable host rocks are mafic metavolcanics rocks that have been silicified and carbonatized and occur in proximity to feldspar ± quartz porphyry intrusions that are up to 90 m wide. Pyrite is the dominate sulphide and high gold values are reported to be associated with acicular arsenopyrite. February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 5 TORONTO VANCOUVER SUDBURY JOHANNESBURG

7 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. 2.2 Terminology Atomic absorption spectroscopy (AAS) is a spectroanalytical procedure for the quantitative determination of chemical elements using the absorption of optical radiation (light) by free atoms in the gaseous state. AAS can be used to determine over 70 different elements in solution or directly in solid samples ( Fire assay: Fire assay is the method of choice for gold analysis. The procedure involves mixing an aliquot of the sample (e.g., 30 g or 50 g) with a flux agent (e.g., sodium borate, PbO) and a collector such as silver. The mixture is heated to ~1150 C. The lead and silver settle to the bottom of the melt and the silver scavenges gold as it sinks. The lead and silver button is cupelled at 950 C. The silver bead (which also contains gold) is dissolved and analyzed by atomic absorption or other techniques ( Gravimetric Finish: The sample under goes fire assay and then the Ag bead is weighed and Ag value calculated from the weight. Au is separated from the Ag in the doré bead by parting with nitric acid. The gold (roasting) flake remaining is weighed gravimetrically on a micro balance for Au ( ICP-OES: Inductively Coupled Plasma Optical Emission Spectroscopy ICP-MS: Inductively Coupled Plasma - Mass Spectrometer: An instrument capable of determining the concentrations of 70+ elements simultaneously by measuring the mass of ions generated by an argon gas plasma heated to 10,000 K and passing through a magnetic quadrupole to the detector. Capable of ultra low detection limits (ppb to ppt) with very wide linear ranges (up to 7 orders of magnitude) (Acme Analytical Laboratories Ltd: QA/QC: Quality Assurance/ Quality Control 2.3 Units The Metric System is the primary system of measure and length used in this Report and is generally expressed in kilometres (km), metres (m) and centimetres (cm); volume is expressed as cubic metres (m 3 ), mass expressed as metric tonnes (t), area as hectares (ha), and gold and silver concentrations as grams per tonne (g/t). Conversions from the Metric System to the Imperial System are provided below and quoted February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 6 TORONTO VANCOUVER SUDBURY JOHANNESBURG

8 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. where practical. Many of the geologic publications and more recent documents now use the Metric System but older documents almost exclusively refer to the Imperial System. Metals and minerals acronyms in this report conform to mineral industry accepted usage and the reader is directed to for a glossary. The term gram/tonne or g/t is expressed as gram per tonne where 1 gram/tonne = 1 ppm (part per million) = 1000 ppb (part per billion). The mineral industry accepted terms Au g/t and g/t Au are substituted for grams gold per metric tonne or g Au/t. Other abbreviations include ppb = parts per billion; ppm = parts per million; oz/t = troy ounce per short ton; Moz = million ounces; Mt = million tonne; t = tonne (1000 kilograms); SG = specific gravity; lb/t = pound/ton; and, st = short ton (2000 pounds). Dollars are expressed in Canadian currency (CAD$) unless otherwise noted. Where quoted, Universal Transverse Mercator (UTM) coordinates are provided in the datum of Canada, NAD 83, Zone 15U North. 2.4 Caracle Creek Qualifications Caracle Creek International Consulting Inc. is an international consulting company with the head office of Canadian operations based in Sudbury, Ontario, Canada. Caracle Creek provides a wide range of geological and geophysical services to the mineral industry. With offices in Canada (Sudbury and Toronto, Ontario and Vancouver, British Columbia) and South Africa (Johannesburg), Caracle Creek is well positioned to service its international client base. Caracle Creek's mandate is to provide professional geological and geophysical services to the mineral exploration and development industry at competitive rates and without compromise. Caracle Creek's professionals have international experience in a variety of disciplines with services that include: Exploration Project Generation, Design and Management Data Compilation and Exploration Target Generation Property Evaluation and Due Diligence Studies Independent Technical Reports (43-101)/Competent Person Reports Mineral Resource/Reserve Modelling, Estimation, Audit; Conditional Simulation February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 7 TORONTO VANCOUVER SUDBURY JOHANNESBURG

9 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. 3D Geological Modelling, Visualization and Database Management In addition, Caracle Creek has access to the most current software for data management, interpretation and viewing, manipulation and target generation. The Qualified Person and author for this Report is Dr. Julie Selway, Ph.D., P.Geo., Senior Principal Geologist for Caracle Creek International Consulting and a geologist in good standing with the Association of Professional Geoscientists of Ontario (APGO #0738). Dr. Selway has worked as a geologist since 1993 with academia and industry on a variety of exploration properties such as rare-element pegmatites, gold, Ni-Cu-PGE, VMS, porphyry Cu and potash. Dr. Selway has also over 8 years of work experience completing QA/QC reviews of drill core assays for the purpose of resource estimates. Dr. Selway has coauthored 25 NI Technical Reports. Dr. Selway is responsible for the entire Report and she did not visit the Property. 3.0 SAMPLE PREPARATION, ANALYSES AND SECURITY 3.1 Sample Security The historic drill core was transported from Lingman Lake Property to a field core logging facility where is was relogged and resampled. The samples were transported to SGS Red Lake for analyses. 3.2 Sample Preparation A total of 1427 samples were submitted to SGS preparation lab in Red Lake including: 1356 drill core, 36 blanks, 12 low grade Au standards, 12 medium grade Au standards and 11 high grade Au standards. Every 20 samples contained one blank and one Au standard. No core duplicates were cut during the 2016 sampling, as the core duplicates were the comparison of the historic and 2016 drill core sample assays. The blank was ½ inch mesh coarse silica purchased from Analytical Solutions Ltd., Toronto, Ontario. The blanks are silica-rich with typically about 97% SiO 2. The Au standards were purchased from CDN Resource Ltd, Vancouver and they include low grade standard Oreas 251, medium grade standard Oreas 209 and high grade standard Oreas 216. The certificate of analyses for these gold standards are given in Appendix 1. The standards method match (fire assay), grade match and matrix match the drill core from Lingman Lake (Table 3-1). February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 8 TORONTO VANCOUVER SUDBURY JOHANNESBURG

10 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. Table 3-1 External standards certified values. Standard name Element Certified value (g/t) Standard deviation (g/t) Matrix Oreas 251 Au quartz lode gold deposit in greenstone belt Oreas 209 Au quartz sericite carbonate schist with sulphides Oreas 216 Au quartz lode gold deposit in greenstone belt SGS Red Lake and Vancouver are accredited for CAN-P-1579 Requirements for Accreditation of Mineral Analysis Testing Laboratories and CAN-P-4E (ISO 17025: 2005) General Requirements for the Competence of Testing and Calibration Laboratories (PALCAN website: SGS Red Lake is accredited for three tests: Au by fire assay (GE_FAA_313 and GO_FAA_303) and Au by gravimetrics (GO_FAG_303). SGS Vancouver is accreditation for 13 tests including multi-elements by aqua regia (GE_ICM14B). 3.3 Sample Analysis SGS Red Lake completed the sample login weights, sample preparation and Au assays. The sample login weight was recorded (analytical code WGH79) (SGS Analytical Guide 2016). The sample preparation was dry, crush < 3.0 kg to 75% passing 2 mm, split 250 g and pulverize to 85% passing 75 µm (analytical code PRP89). Au was analyzed by lead fusion fire assay followed by AAS finish on 30 g sample (analytical code GE_FAA313). Au assays > 10 g/t were also analyzed by lead fusion fire assay with gravimetric finish preformed on 30 g sample (analytical code GO_FAG303). SGS Vancouver completed the multielement analysis for 52 elements. The samples were then analyzed using an aqua regia digestion and ICP-AES and ICP-MS finishes on 0.5 g sample (analytical code GE_ICM14B) (SGS Analytical Guide 2016). Aqua regia digestion 14 is based on 3:1 ratio for HCl: HNO3. SGS Vancouver also analyzed 4 high grade Ag samples by two acid digestion followed by AAS finish on 0.5 g sample with a lower detection limit of 1 g/t Ag (analytical code GO_AAS10D). SGS inserted internal standards, blanks, pulp duplicates and preparation duplicates within each sample batch as part of their own internal monitoring of quality control. SGS used the following Au internal February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 9 TORONTO VANCOUVER SUDBURY JOHANNESBURG

11 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. standards: OXF125 (certified value ± g/t Au), OXK119 (certified value ± g/t Au), OXL118 (certified value ± g/t Au) and CDN-GS-5Q (certified value of 5.59 g/t ± 0.35 g/t Au). OX standards are sold by Rocklabs, New Zealand and CDN standards are sold by CDN Resources Ltd., Vancouver. In the Qualified Person s opinion, the sample preparation, security and analytical procedures are adequate for the purpose of verification of historic drill hole assays. 4.0 DATA VERIFICATION 4.1 Quality Control The Lingman samples were submitted to SGS Red Lake preparation lab in two batches. The first batch of 656 samples were received by SGS on Nov. 10, Technical issues were identified with the gold assays by Dr. Selway, QP for the QA/QC. SGS Red Lake re-assayed all of the job orders with technical issues. The original assays with the technical issues were replaced by the re-assays and they are not included in the assay database and not included in this report. There were no technical issues for the second batch of 771 samples received by SGS on Dec. 9, Blanks A total of 36 quartz blanks were inserted into the sample stream. All of the blanks passed except for one sample (B60720) from drill hole (Figure 4-1). The failed blank had 0.24 g/t Au. This blank was analyzed twice and it failed both times. SGS Red Lake checked it for transcription errors, but there were none. This blank likely was contaminated during pulverization. The failure rate of 2.8 % is acceptable. February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 10 TORONTO VANCOUVER SUDBURY JOHANNESBURG

12 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. Figure 4-1 Control chart for blanks. Sample event vs Au (g/t) Au standards Low Grade Au Standard Oreas 251 A total of 12 low grade Au standards were inserted into the sample stream with a certified value of g/t Au and a standard deviation of ±0.015 g/t Au for fire assay. All of the low grade standards passed and no bias was detected (Figure 4-2). Three low grade standards were originally labelled as high grade standards in the logs, but the correct name was labelled in the sample tag book. The correction was made in the logs and the assay database and these samples passed. February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 11 TORONTO VANCOUVER SUDBURY JOHANNESBURG

13 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. Figure 4-2 Control chart for low grade standard Oreas 251. Medium grade standard Oreas 209 A total of 12 low grade Au standards were inserted into the sample stream with a certified value of 1.58 g/t Au and a standard deviation of ±0.044 g/t Au by fire assay. All of the medium grade standards passed within ± 2 standard deviation (Figure 4-3). The assays for the medium grade standards are biased low. Three medium grade standards were originally labelled as low grade standards in the logs, but the correct name was labelled in the sample tag book. The correction was made in the logs and the assay database and these samples passed. February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 12 TORONTO VANCOUVER SUDBURY JOHANNESBURG

14 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. Figure 4-3 Control chart for medium grade standard Oreas 209. High grade standard Oreas 216 A total of 11 low grade Au standards were inserted into the sample stream with a certified value of 6.66 g/t Au and a standard deviation of ±0.155 g/t Au by fire assay. All of the high grade standards passed, of which most passed within ± 2 standard deviation (Figure 4-4). No bias was detected. Three high grade standards were originally labelled as medium grade standards in the logs, but the correct name was labelled in the sample tag book. The correction was made in the logs and the assay database and these samples passed. February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 13 TORONTO VANCOUVER SUDBURY JOHANNESBURG

15 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. Figure 4-4 Control chart for high grade standard Oreas Lab Pulp Duplicates A total of 53 pulp duplicates were inserted into the sample stream by Actlabs. The pulp duplicates are the same sample is done twice at the weighing stage (Susan Isaac, SGS Red Lake, personal communication). The pulp duplicates are chosen randomly by Actlab s LIMS system. The duplicate is inserted one for every 37 samples and is labelled REP in the assay certificates. All of the pulp duplicates passed and the R 2 = (Figure 4-5) Lab Preparation Duplicates A total of 34 preparation duplicates were inserted into the sample stream by Actlabs. The preparation duplicates are the second split is done at the crushing stage (Susan Isaac, SGS Red Lake, personal February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 14 TORONTO VANCOUVER SUDBURY JOHANNESBURG

16 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. communication). The duplicate is inserted one for every 37 samples and is labelled DUP in the assay certificates. All of the preparation duplicates passed and the R 2 = (Figure 4-6). February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 15 TORONTO VANCOUVER SUDBURY JOHANNESBURG

17 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. Figure 4-5 Pulp duplicates: a) original vs pulp duplicates, b) pair mean vs absolute difference Au (g/t). February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 16 TORONTO VANCOUVER SUDBURY JOHANNESBURG

18 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. Figure 4-6 Preparation duplicates: a) original vs preparation duplicates, b) pair mean vs absolute difference Au (g/t). February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 17 TORONTO VANCOUVER SUDBURY JOHANNESBURG

19 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd Core Duplicates Historic vs Current A comparison was made between the original historic Au assay and the 2016 re-assay. These are core duplicates as they come from the same drill core interval. A compilation of the historic Au assays was made by manually typing them into an excel table from the original assay certificates given in assessment reports (1987 holes: MNDM assessment report 53F15SW0006; 1988 holes: MNDM assessment report 53F15SW0007). In 2016, Au was analyzed by fire assay and the high grade samples were analyzed by gravimetrics. When deciding which Au value to use in plotting in order of priority: The 2016 fire assay re-assay of the first batch of samples was used over the 2016 first analysis which had technical issues. Gravimetrics were used over fire assay for first and second batch of samples, as gravimetrics is superior analytical method. Where the 2016 fire assay re-assay of the first batch had a third fire assay completed to confirm the second assay result. The second assay result was used as the third is a pulp duplicate used first for confirmation of the second result. The second batch of samples were only analyzed once by fire assay, so these results were used where there is no gravimetrics results available. The historic Au assays vs the 2016 assay of the same interval of core was used to compare the two sets of data and to test the reproducibility of the historic Au assays. A total of 450 core duplicate pairs were plotted of which 9 duplicate pairs were considered to be failed duplicates due to the significant difference between the two Au assays. The linear regression line through the passed duplicated has R 2 = The significant absolute pair difference is more likely due to gold nugget effect than analytical error, as the dissimilar pairs are high grade Au samples with > 2 g/t Au. The dissimilar pairs represent 2.0% of the core duplicate pairs which the QP considers to be an excellent correlation between the historic and 2016 Au assays. Three of the dissimilar pairs are from drill hole and are samples: B , B and B from an interval between ft. This interval is mafic volcanic rocks with Fecarbonate alteration and common to abundant quartz-carbonate veins. We are confident in the 2016 assays, as they were analyzed by gravimetrics and sample B was analyzed twice with very similar results (i.e., and g/t Au). The 2016 gravimetric analysis of samples B (41.28 g/t Au) and B (42.63 g/t Au) are also very similar. February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 18 TORONTO VANCOUVER SUDBURY JOHANNESBURG

20 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. Two of the dissimilar pairs are from drill hole and are samples: B from interval ft and B from interval ft. Sample B from interval ft has g/t Au in the historical assay and g/t Au in the 2016 assays. Sample B is from chloritic basalt with < 2 cm pyrite-quartz-carbonate veins and % pyrite. Sample B and B is from silicified basalt with 5 20% fine-grained pyrrhotite-pyrite stringers, 10% sericite and chlorite in fine stringers. The lithology for this interval suggests that high grade Au should be present and the differences in the Au assays is likely due to gold nugget effect. February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 19 TORONTO VANCOUVER SUDBURY JOHANNESBURG

21 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. Figure 4-7 Historic vs current core duplicates. February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 20 TORONTO VANCOUVER SUDBURY JOHANNESBURG

22 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd Conclusions All of the blanks passed except for one sample (B60720) from drill hole which had 0.24 g/t Au. This blank likely was contaminated during pulverization. The failure rate of 2.8 % for the blanks is acceptable. All of the low, medium and high grade external standards passed which indicates good accuracy. No bias was detected for the low grade and high grade standards. The assays for the medium grade standards are biased low. Sample mixups in the database were minimal. Three low grade standards were originally labelled as high grade standards in the logs, three medium grade standards were originally labelled as low grade standards in the logs, and three high grade standards were originally labelled as medium grade standards in the logs. The correct name was labelled in the sample tag book in all of these instances. The correction was made in the logs and the assay database and these samples passed. All of the pulp duplicates passed and the R 2 = All of the preparation duplicates passed and the R 2 = The pulp and preparation duplicates indicate good reproducibility of the assays. The historic Au assays vs the 2016 assay of the same interval of core (i.e., core duplicates) was used to compare the two sets of data and to test the reproducibility of the historic Au assays. A total of 450 core duplicate pairs were plotted of which 9 duplicate pairs were considered to be failed duplicates due to the significant difference between the two Au assays. The linear regression line through the passed duplicated has R 2 = The significant absolute pair difference is more likely due to gold nugget effect than analytical error, as the dissimilar pairs are high grade Au samples with > 2 g/t Au. The dissimilar pairs represent 2.0% of the core duplicate pairs which the QP considers to be an excellent correlation between the historic and 2016 Au assays. In the Qualified Person s opinion, the assay data is adequate for the purpose of verification of historic drill core assays and for future resource estimation calculations. February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 21 TORONTO VANCOUVER SUDBURY JOHANNESBURG

23 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. 5.0 REFERENCES Hanych, W. and Racicot, F. (2013): Technical Report on the Lingman Lake Property, Lingman Lake Area, District of Kenora, Ontario, Canada, prepared for Signature Resources Ltd., dated December 20, February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 22 TORONTO VANCOUVER SUDBURY JOHANNESBURG

24 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. 6.0 STATEMENT OF AUTHORSHIP This Report, titled QA/QC Report for Resampling of Historic Drill Core, Lingman Lake, Lingman Lake Area, NW Ontario, Canada, and dated Feb. 13, 2017 was prepared and signed by the following Qualified Person: Julie Selway Julie Selway, Ph.D., P.Geo. Feb. 13, 2017 Sudbury, Ontario, Canada February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 23 TORONTO VANCOUVER SUDBURY JOHANNESBURG

25 QA/QC Report Lingman Lake, NW Ontario Signature Resources Ltd. Appendix 1 Certificates of Analyses for Au Standards February 13, 2017 CARACLE CREEK INTERNATIONAL CONSULTING INC. Page 24 TORONTO VANCOUVER SUDBURY JOHANNESBURG

26 ORE RESEARCH & EXPLORATION P/L ABN A Hosie Street Bayswater North VIC 3153 AUSTRALIA info@ore.com.au CERTIFICATE OF ANALYSIS FOR GOLD ORE CERTIFIED REFERENCE MATERIAL OREAS 209 Table 1. Certified Values, SD's, 95% Confidence and Tolerance Limits for OREAS 209 Constituent Certified 95% Confidence Limits 95% Tolerance Limits 1SD Value Low High Low High Fire Assay Au, Gold (ppm) * 1.60* Aqua Regia Digestion Ag, Silver (ppm) Al, Aluminium (wt.%) As, Arsenic (ppm) Au, Gold (ppm) * 1.48* B, Boron (ppm) < 10 IND IND IND IND IND Ba, Barium (ppm) Be, Beryllium (ppm) < 0.5 IND IND IND IND IND Bi, Bismuth (ppm) IND IND Ca, Calcium (wt.%) Cd, Cadmium (ppm) < 0.2 IND IND IND IND IND Ce, Cerium (ppm) Co, Cobalt (ppm) Cr, Chromium (ppm) Cs, Cesium (ppm) Cu, Copper (ppm) Dy, Dysprosium (ppm) Eu, Europium (ppm) Fe, Iron (wt.%) Ga, Gallium (ppm) Gd, Gadolinium (ppm) Template: BUP docx (Aprv:[1.0] on:[12/07/2014]) Project: COA-1091-OREAS209.docx Section: 1, Page: 1 of 9 Printed: 26-Aug-2014

27 Constituent Aqua Regia Digestion continued Table 1 continued Certified 95% Confidence Limits 95% Tolerance Limits 1SD Value Low High Low High Hf, Hafnium (ppm) Hg, Mercury (ppm) < 1 IND IND IND IND IND In, Indium (ppm) IND IND K, Potassium (wt.%) La, Lanthanum (ppm) Li, Lithium (ppm) Lu, Lutetium (ppm) Mg, Magnesium (wt.%) Mn, Manganese (wt.%) Mo, Molybdenum (ppm) Na, Sodium (wt.%) Ni, Nickel (ppm) P, Phosphorus (wt.%) Pb, Lead (ppm) Rb, Rubidium (ppm) S, Sulphur (wt.%) Sb, Antimony (ppm) < 2 IND IND IND IND IND Sc, Scandium (ppm) Se, Selenium (ppm) IND IND Sn, Tin (ppm) IND IND Sr, Strontium (ppm) Ta, Tantalum (ppm) < 0.05 IND IND IND IND IND Tb, Terbium (ppm) Th, Thorium (ppm) Ti, Titanium (wt.%) Tl, Thallium (ppm) IND IND U, Uranium (ppm) V, Vanadium (ppm) W, Tungsten (ppm) Y, Yttrium (ppm) Yb, Ytterbium (ppm) Zn, Zinc (ppm) Zr, Zirconium (ppm) Note: intervals may appear asymmetric due to rounding; *determined from RSD of gold INAA data for 30g analytical subsample weight. INTRODUCTION OREAS reference materials are intended to provide a low cost method of evaluating and improving the quality of analysis of geological samples. To the geologist they provide a means of implementing quality control in analytical data sets generated in exploration from the grass roots level through to prospect evaluation, and in grade control at mining operations. To the analyst they provide an effective means of calibrating analytical equipment, assessing new techniques and routinely monitoring in-house procedures. COA-1091-OREAS209.docx Page: 2 of 9

28 SOURCE MATERIALS Certified Reference Material (CRM) OREAS 209 was prepared from a blend of goldbearing Magdala ore from the Stawell Gold Mine, west-central Victoria, Australia and barren tholeiitic basalt from Epping, Victoria, Australia. The Magdala lode is intimately associated with an intensely deformed package of volcanogenic sedimentary rocks. The ore samples were taken from basalt contact lodes and are strongly chlorite-altered (+/- silica, stilpnomelane) carbonaceous mudstones located directly on the western margin of the Magdala basalt dome. Mineralisation in the ore consists of a quartz-sericite-carbonate schist assemblage containing the sulphides arsenopyrite, pyrrhotite and pyrite. OREAS 209 is one of a suite of eleven CRMs ranging in gold content from to 9.25ppm. COMMINUTION AND HOMOGENISATION PROCEDURES The material constituting OREAS 209 was prepared in the following manner: drying to constant mass at 105 C; crushing and milling of the barren material to 95% minus 75 microns; crushing and milling of the ore material to 100% minus 30 microns; blending in appropriate proportions to achieve the desired grade; packaging in 60g units sealed in laminated foil pouches and 1kg units in plastic jars. ANALYTICAL PROGRAM Twenty six commercial analytical laboratories participated in the program to certify the 54 elements reported in Table 1. The following methods were employed: Gold via 25-40g fire assay with AAS (22 labs) or ICP-OES (1 lab) finish; Instrumental neutron activation analysis for Au on 1g subsamples to confirm homogeneity (1 laboratory). Gold via 15-40g aqua regia digestion with ICP-MS (9 labs), AAS (3 labs) or solvent extraction AAS (1 lab) finish; Aqua regia digestion for full elemental suite ICP-OES and ICP-MS (up to 19 laboratories depending on the element); For the round robin program twenty 1.2kg test units were taken at predetermined intervals during the bagging stage, immediately following final blending and are considered representative of the entire batch. The six samples received by each laboratory were obtained by taking two 110g scoop splits from each of three separate 1.2kg test units. This format enabled nested ANOVA treatment of the results to evaluate homogeneity, i.e. to ascertain whether between-unit variance is greater than within-unit variance. Table 1 presents the 54 certified values together with their associated 1SD s, 95% confidence and tolerance limits and Table 2 shows 15 indicative values. Table 3 provides performance gate intervals for the certified values of each method group based on their pooled 1SD s. Tabulated results of all elements (including Au INAA analyses) together with uncorrected means, medians, standard deviations, relative standard deviations and percent deviation of lab means from the corrected mean of means (PDM 3 ) are presented in the detailed certification data for this CRM (OREAS 209 Datapack.xlsx). COA-1091-OREAS209.docx Page: 3 of 9

29 Table 2. Indicative Values for OREAS 209. Constituent Unit Value Constituent Unit Value Constituent Unit Value Aqua Regia Digestion Er ppm 1.14 Pd ppb < 10 Sm ppm 3.22 Ge ppm Pr ppm 3.42 Te ppm Ho ppm 0.50 Pt ppb 3 Tm ppm 0.15 Nb ppm 0.66 Re ppb 1 Nd ppm 13.9 Ru ppm 0.10 Infrared Combustion C wt.% S wt.% STATISTICAL ANALYSIS Certified Values, Confidence Limits, Standard Deviations and Tolerance Limits (Table 1) have been determined for each analyte following removal of individual, laboratory dataset (batch) and 3SD outliers (single iteration). For individual outliers within a laboratory batch the z-score test is used in combination with a second method that determines the per cent deviation of the individual value from the batch median. Outliers in general are selected on the basis of z-scores > 2.5 and with per cent deviations (i) > 3 and (ii) more than three times the average absolute per cent deviation for the batch. In certain instances statistician s prerogative has been employed in discriminating outliers. Each laboratory data set mean is tested for outlying status based on z-score discrimination and rejected if > 2.5. After individual and laboratory data set (batch) outliers have been eliminated a non-iterative 3 standard deviation filter is applied, with those values lying outside this window also relegated to outlying status. Certified Values are the means of accepted laboratory means after outlier filtering. The INAA data is omitted from determination of the certified value for Au and is used solely for the calculation of Tolerance Limits and homogeneity evaluation of OREAS 209. Indicative (uncertified) values (Table 2) are provided where i) the number of laboratories reporting a particular analyte is insufficient (< 5) to support certification; ii) inter-laboratory consensus is poor; or iii) a significant proportion of results are outlying. 95% Confidence Limits are inversely proportional to the number of participating laboratories and inter-laboratory agreement. It is a measure of the reliability of the certified value. A 95% confidence interval indicates a 95% probability that the true value of the analyte under consideration lies between the upper and lower limits. 95% Confidence Limits should not be used as control limits for laboratory performance. Standard Deviation values (1SDs) are reported in Table 1 and provide an indication of a level of performance that might reasonably be expected from a laboratory being monitored by this CRM in a QA/QC program. They take into account errors attributable to measurement uncertainty and CRM variability. For an effective CRM the contribution of the latter should be negligible in comparison to measurement errors. The Standard Deviation values include all sources of measurement uncertainty: between-lab variance, within-run variance (precision errors) and CRM variability. The SD for each analyte s certified value is calculated from the same filtered data set used to determine the certified value, i.e. after removal of all individual, lab dataset (batch) and 3SD outliers (single iteration). These outliers can only be removed after the absolute homogeneity of the CRM has been independently established, i.e. the outliers must be confidently deemed to be analytical rather than arising from inhomogeneity of the CRM. The standard deviation is COA-1091-OREAS209.docx Page: 4 of 9

30 then calculated for each analyte from the pooled accepted analyses generated from the certification program. Table 3 shows Performance Gates calculated for two and three standard deviations. As a guide these intervals may be regarded as warning or rejection for multiple 2SD outliers, or rejection for individual 3SD outliers in QC monitoring, although their precise application should be at the discretion of the QC manager concerned. A second method utilises a 5% window calculated directly from the certified value. Standard deviation is also shown in relative percent for one, two and three relative standard deviations (1RSD, 2RSD and 3RSD) to facilitate an appreciation of the magnitude of these numbers and a comparison with the 5% window. Caution should be exercised when concentration levels approach lower limits of detection of the analytical methods employed as performance gates calculated from standard deviations tend to be excessively wide whereas those determined by the 5% method are too narrow. Table 3. Performance Gates for OREAS 209 Constituent Certified Value 1SD Absolute Standard Deviations Relative Standard Deviations 5% window 2SD Low 2SD High 3SD Low 3SD High 1RSD 2RSD 3RSD Low High Fire Assay Au, ppm % 5.59% 8.39% Aqua Regia Digestion Ag, ppm % 27.62% 41.44% Al, wt.% % 8.84% 13.26% As, ppm % 8.97% 13.46% Au, ppm % 12.64% 18.96% B, ppm < 10 IND IND IND IND IND IND IND IND IND IND Ba, ppm % 17.38% 26.07% Be, ppm < 0.5 IND IND IND IND IND IND IND IND IND IND Bi, ppm % 13.56% 20.34% Ca, wt.% % 9.25% 13.87% Cd, ppm < 0.2 IND IND IND IND IND IND IND IND IND IND Ce, ppm % 12.13% 18.20% Co, ppm % 7.75% 11.62% Cr, ppm % 13.28% 19.92% Cs, ppm % 14.32% 21.49% Cu, ppm % 9.71% 14.57% Dy, ppm % 36.45% 54.68% Eu, ppm % 37.47% 56.21% Fe, wt.% % 12.00% 17.99% Ga, ppm % 14.39% 21.58% Gd, ppm % 40.04% 60.06% COA-1091-OREAS209.docx Page: 5 of 9

31 Table 3 continued. Certified Constituent Value 1SD Aqua Regia Digestion continued Absolute Standard Deviations Relative Standard Deviations 5% window 2SD Low 2SD High 3SD Low 3SD High 1RSD 2RSD 3RSD Low High Hf, ppm % 11.90% 17.85% Hg, ppm < 1 IND IND IND IND IND IND IND IND IND IND In, ppm % 35.80% 53.70% K, wt.% % 23.43% 35.14% La, ppm % 32.84% 49.26% Li, ppm % 14.85% 22.27% Lu, ppm % 18.49% 27.73% Mg, wt.% % 11.25% 16.88% Mn, wt.% % 10.17% 15.26% Mo, ppm % 10.49% 15.74% Na, wt.% % 22.88% 34.33% Ni, ppm % 11.05% 16.58% P, wt.% % 12.78% 19.16% Pb, ppm % 28.23% 42.35% Rb, ppm % 16.73% 25.10% S, wt.% % 14.67% 22.00% Sb, ppm < 2 IND IND IND IND IND IND IND IND IND IND Sc, ppm % 27.42% 41.12% Se, ppm % 24.38% 36.57% Sn, ppm % 23.64% 35.45% Sr, ppm % 20.96% 31.44% Ta, ppm < 0.05 IND IND IND IND IND IND IND IND IND IND Tb, ppm % 17.84% 26.75% Th, ppm % 11.83% 17.74% Ti, wt.% % 31.69% 47.54% Tl, ppm % 39.63% 59.44% U, ppm % 19.95% 29.92% V, ppm % 18.75% 28.13% W, ppm % 34.30% 51.45% Y, ppm % 10.15% 15.23% Yb, ppm % 11.55% 17.32% Zn, ppm % 10.30% 15.45% Zr, ppm % 8.98% 13.47% COA-1091-OREAS209.docx Page: 6 of 9

32 Tolerance Limits (ISO Guide 3207) were determined using an analysis of precision errors method and are considered a conservative estimate of true homogeneity. The meaning of tolerance limits may be illustrated for zinc by aqua regia digestion, where 99% of the time (1-α=0.99) at least 95% of subsamples (ρ=0.95) will have concentrations lying between 72 and 76ppm. Put more precisely, this means that if the same number of subsamples were taken and analysed in the same manner repeatedly, 99% of the tolerance intervals so constructed would cover at least 95% of the total population, and 1% of the tolerance intervals would cover less than 95% of the total population (ISO Guide 35). For gold the tolerance has been determined by INAA using the reduced analytical subsample method which utilises the known relationship between standard deviation and analytical subsample weight (Ingamells and Switzer, 1973). In this approach the sample aliquot is substantially reduced to a point where most of the variability in replicate assays should be due to inhomogeneity of the reference material and measurement error becomes negligible. In this instance a subsample weight of 1.0 gram was employed and the 1RSD of 2.08% (or 0.45% at a 30g charge weight) confirms the high level of gold homogeneity in OREAS 209. The homogeneity of OREAS 209 has also been evaluated in an ANOVA study for all certified analytes. This study tests the null hypothesis that no statistically significant difference exists between the between-unit variance and the within-unit variance (i.e. p- values <0.05 indicate rejection of the null hypothesis). Of the 54 certified values, no failures were observed indicating no evidence to reject the null hypothesis. Based on the statistical analysis of the results of the interlaboratory certification program it can be concluded that OREAS 209 is fit-for-purpose as a certified reference material (see Intended Use below). PARTICIPATING LABORATORIES Acme (BV), Santiago, Chile Acme (BV), Vancouver, BC, Canada Actlabs, Ancaster, Ontario, Canada ALS, Brisbane, QLD, Australia ALS, Johannesburg, South Africa ALS, Loughrea, Galway, Ireland ALS, Perth, WA, Australia ALS, Vancouver, BC, Canada Bureau Veritas Geoanalytical, Adelaide, SA, Australia Bureau Veritas Kalassay, Perth, WA, Australia Gekko Assay Labs, Ballarat, VIC, Australia Intertek Genalysis, Perth, WA, Australia Intertek Testing Services, Cupang, Muntinlupa, Philippines Intertek Testing Services, Hidden Valley, Wau, PNG Intertek Testing Services, Shunyi, Beijing, China Intertek Testing Services, Townsville, QLD, Australia NAGROM, Perth, WA, Australia Newmont Metallurgical Services, Engelwood, Colorado, USA Ok Tedi Mine Lab, Mt Fubilan, Western Province, PNG PT Geoservices Ltd, Cikarang, Jakarta Raya, Indonesia COA-1091-OREAS209.docx Page: 7 of 9

33 SGS Canada Inc., Vancouver, BC, Canada SGS Lakefield Research Ltd, Lakefield, Ontario, Canada SGS Mineral Services, Townsville, QLD, Australia SGS South Africa Pty Ltd, Booysens, Gauteng, South Africa Shiva Analyticals Ltd, Bangalore North, Karnataka, India TSL Laboratories Inc., Saskatoon, Saskatchewan, Canada PREPARER AND SUPPLIER OF THE REFERENCE MATERIAL Reference material OREAS 209 has been prepared, certified and is supplied by: ORE Research & Exploration Pty Ltd Tel: A Hosie Street Fax: Bayswater North VIC 3153 Web: AUSTRALIA It is available in unit sizes of 60g (single-use laminated foil pouches) and 1kg (plastic jars). INTENDED USE OREAS 209 is intended for the following uses: for the monitoring of laboratory performance in the analysis of analytes reported in Table 1 in geological samples; for the verification of analytical methods for analytes reported in Table 1; for the calibration of instruments used in the determination of the concentration of analytes reported in Table 1. STABILITY AND STORAGE INSTRUCTIONS OREAS 209 has been prepared from gold ore diluted with barren tholeiitic basalt. It is low in reactive sulphide (~0.9% S) and in its unopened state and under normal conditions of storage has a shelf life beyond ten years. Its stability will be monitored at regular intervals and purchasers notified if any changes are observed. INSTRUCTIONS FOR THE CORRECT USE OF THE REFERENCE MATERIAL The certified values for OREAS 209 refer to the concentration level in its packaged state. It should not be dried prior to weighing and analysis. HANDLING INSTRUCTIONS Fine powders pose a risk to eyes and lungs and therefore standard precautions such as the use of safety glasses and dust masks are advised. COA-1091-OREAS209.docx Page: 8 of 9

34 LEGAL NOTICE Ore Research & Exploration Pty Ltd has prepared and statistically evaluated the property values of this reference material to the best of its ability. The Purchaser by receipt hereof releases and indemnifies Ore Research & Exploration Pty Ltd from and against all liability and costs arising from the use of this material and information. QMS ACCREDITED Ore Research & Exploration is accredited to ISO 9001:2008 by Lloyd s Register Quality Assurance Limited for its quality management system including development, manufacturing, certification and supply of CRMs. CERTIFYING OFFICER Craig Hamlyn (B.Sc. Hons - Geology), Technical Manager - ORE P/L REFERENCES Ingamells, C. O. and Switzer, P. (1973), Talanta 20, ISO Guide 3207 (1975), Statistical interpretation of data - Determination of a statistical tolerance interval. ISO Guide 35 (2006), Certification of reference materials - General and statistical principals. COA-1091-OREAS209.docx Page: 9 of 9

35 ORE RESEARCH & EXPLORATION P/L ABN A Hosie Street Bayswater North VIC 3153 AUSTRALIA info@ore.com.au CERTIFICATE OF ANALYSIS FOR GOLD ORE CERTIFIED REFERENCE MATERIAL OREAS 216 Constituent Fire Assay Table 1. Certified Values, SD's, 95% Confidence and Tolerance Limits for OREAS 216 Certified 95% Confidence Limits 95% Tolerance Limits 1SD Value Low High Low High Au, Gold (ppm) * 6.67* Aqua Regia Digestion Au, Gold (ppm) *Gold Tolerance Limits for typical 30g fire assay charge weight determined from 20 x 85mg NAA results and the Sampling Constant (Ingamells & Switzer, 1973); Gold Tolerance Limits for typical 25g aqua regia sample weight determined as above; Please note: intervals may appear asymmetric due to rounding. The homogeneity of OREAS 216 is of a level such that no sampling error exists for a conventional fire assay or aqua regia determination. Template: BUP docx (Aprv:[1.0] on:[12/07/2014]) Project: COA-1145-OREAS216.docx Section: 1, Page: 1 of 9 Printed: 8-Sep-2015

36 INTRODUCTION OREAS reference materials are intended to provide a low cost method of evaluating and improving the quality of analysis of geological samples. To the geologist they provide a means of implementing quality control in analytical data sets generated in exploration from the grass roots level through to prospect evaluation, and in grade control at mining operations. To the analyst they provide an effective means of calibrating analytical equipment, assessing new techniques and routinely monitoring in-house procedures. SOURCE MATERIALS Certified Reference Material (CRM) OREAS 216 was prepared from a blend of Archean greenstone-hosted Wilber Lode primary ore from the Andy Well Gold Mine and barren Cambrian greenstone sourced from a quarry north of Melbourne, Australia. The Wilber Lode is a shear-hosted, narrow vein, quartz lode-style gold deposit situated within the Meekatharra-Wydgee greenstone belt in the Archean Yilgarn Craton of Western Australia. The common primary mineral assemblage, as stated by Mason and Harris (2011, 2012, cited in Hingston et al, 2014), is quartz, calcite, chlorite, fuchsite, pyrite, galena, sphalerite, chalcopyrite and gold. The host rock consists of a complex sequence of Archean metabasalt and meta-porphyritic rocks derived from a primary mineralogy of albite, actinolite, chlorite, sericite, biotite, calcite, zoisite, muscovite, quartz and titanate. The Andy Well deposit is located approximately 45km north of Meekatharra in the Murchison region of Western Australia. The approximate major and trace element composition of OREAS 216 is provided in Table 2. The non-certified values contained in this table are the means of duplicate assays from one laboratory. Fire Assay Table 2. Approximate major and trace element data for OREAS 216. Constituent Unit Value Constituent Unit Value Constituent Unit Value Borate Fusion ICP Thermogravimetry Pd ppb 9 Pt ppb 9 Al wt.% 5.69 Ho ppm 0.43 Sn ppm 0.75 Ba ppm 218 K wt.% Sr ppm 85 Ca wt.% 4.55 La ppm 5.35 Ta ppm 0.10 Ce ppm 10.9 Lu ppm 0.20 Tb ppm 0.33 Cr ppm 540 Mg wt.% 4.38 Th ppm 1.45 Cs ppm 0.55 Mn wt.% Ti wt.% Dy ppm 2.10 Na wt.% 1.39 Tm ppm 0.20 Er ppm 1.39 Nb ppm 2.25 TOT_ICP wt.% Eu ppm 0.55 Nd ppm 5.90 U ppm 0.37 Fe wt.% 5.26 P wt.% V ppm 168 Ga ppm 12.6 Pr ppm 1.35 W ppm 10.0 Gd ppm 1.92 Rb ppm 22.7 Y ppm 12.1 Ge ppm < 5 Si wt.% Yb ppm 1.39 Hf ppm 1.50 Sm ppm 1.44 Zr ppm 56 LOI 1000 wt.% 5.67 COA-1145-OREAS216.docx Page: 2 of 9

37 Table 2 continued. Constituent Unit Value Constituent Unit Value Constituent Unit Value Infrared Combustion 4-Acid Digestion C wt.% S wt.% Ag ppm 1.35 Li ppm 30.0 Sc ppm 25.0 Cd ppm 0.55 Mo ppm 3.00 Zn ppm 81 Co ppm 35.0 Ni ppm 182 Cu ppm 130 Pb ppm 30.0 Aqua Regia Digestion As ppm 58 In ppm Se ppm 0.85 Bi ppm 0.59 Re ppm Te ppm 0.30 Hg ppm 0.12 Sb ppm 0.39 Tl ppm 0.11 COMMINUTION AND HOMOGENISATION PROCEDURES The material constituting OREAS 216 was prepared in the following manner: drying to constant mass at 105 C; crushing and milling of the barren material to 95% minus 75 microns; crushing and milling of the ore material to 100% minus 30 microns; blending in appropriate proportions to achieve the desired grade; packaging in 60 and 100g units sealed in laminated foil pouches and 1kg units in plastic jars. ANALYTICAL PROGRAM Thirty-three commercial analytical laboratories participated in the program to certify gold (as reported in Table 1) by the following methods: Gold via 25-40g fire assay with AAS (25 labs) or ICP-OES (7 labs) finish; Instrumental neutron activation analysis for Au on 20 x 85mg subsamples to confirm homogeneity (1 laboratory). Gold via 15-50g aqua regia digestion with ICP-MS (11 labs), AAS (7 labs) or ICP- OES (1 lab) finish. For the round robin program, twenty 1.4kg test units were taken at predetermined intervals during the bagging stage, immediately following homogenisation and are considered representative of the entire batch. The six samples received by each laboratory were obtained by taking two 120g scoop splits from each of three separate 1.4kg test units. This format enabled a nested Analysis of Variance (ANOVA) treatment of the results to evaluate homogeneity, i.e. to ascertain whether between-unit variance is greater than within-unit variance. Table 1 presents the certified values together with their associated 1SD s, 95% confidence and tolerance limits. Table 2 provides indicative major and trace element data and Table 3 shows the gold neutron activation analysis (NAA) results for twenty 85mg subsamples determined by the Australian Nuclear Science & Technology Organisation (ANSTO) located in Lucas Heights, NSW, Australia. Table 4 provides COA-1145-OREAS216.docx Page: 3 of 9

38 performance gate intervals for the certified values of each method group based on their pooled 1SD s. Tabulated results of all elements (including Au NAA analyses) together with uncorrected means, medians, standard deviations, relative standard deviations and percent deviation of lab means from the corrected mean of means (PDM 3 ) are presented in the detailed certification data for this CRM (OREAS 216 Datapack.xlsx). Table 3. Neutron Activation Analysis of Au on 20 x 85mg subsamples. Replicate NAA No 0.09g Mean 6.79 Median 6.81 Std Dev Rel.Std.Dev. 1.06% PDM % STATISTICAL ANALYSIS Certified Values, Confidence Limits, Standard Deviations and Tolerance Limits (Table 1) have been determined for gold by two methods: fire assay and aqua regia digestion. These statistics were calculated following the removal of individual, laboratory dataset (batch) and 3SD outliers (single iteration). For individual outliers within a laboratory batch the z-score test is used in combination with a second method that determines the per cent deviation of the individual value from the batch median. Outliers in general are selected on the basis of z-scores > 2.5 and with per cent deviations (i) > 3 and (ii) more than three times the average absolute per cent deviation for the batch. In certain instances statistician s prerogative has been employed in discriminating outliers. Each laboratory data set mean is tested for outlying status based on z-score discrimination and rejected if > 2.5. After individual and laboratory data set (batch) outliers have been eliminated a non-iterative 3 standard deviation filter is applied, with those values lying outside this window also relegated to outlying status. COA-1145-OREAS216.docx Page: 4 of 9

39 Certified Values are the means of accepted laboratory means after outlier filtering. The NAA data is omitted from determination of the certified value for gold and is used solely for the calculation of Tolerance Limits and homogeneity evaluation of OREAS % Confidence Limits are inversely proportional to the number of participating laboratories and inter-laboratory agreement. It is a measure of the reliability of the certified value. A 95% confidence interval indicates a 95% probability that the true value of the analyte under consideration lies between the upper and lower limits. 95% Confidence Limits should not be used as control limits for laboratory performance. Standard Deviation values (1SDs) are reported in Table 1 and provide an indication of a level of performance that might reasonably be expected from a laboratory being monitored by this CRM in a QA/QC program. The SD s take into account errors attributable to measurement uncertainty and CRM variability. For an effective CRM the contribution of the latter should be negligible in comparison to measurement errors. The SD values thus include all sources of measurement uncertainty: between-lab variance, within-run variance (precision errors) and CRM variability. OREAS prepared reference materials have a level of homogeneity such that the observed variance from repeated analysis has its origin almost exclusively in the analytical process rather than the reference material itself. The SD for each analyte s certified value is calculated from the same filtered data set used to determine the certified value, i.e. after removal of any individual, lab dataset (batch) and 3SD outliers (single iteration). These outliers can only be removed after the absolute homogeneity of the CRM has been independently established, i.e. the outliers must be confidently deemed to be analytical rather than arising from inhomogeneity of the CRM. The standard deviation is then calculated for each analyte from the pooled accepted analyses generated from the certification program. In the application of SD s in monitoring performance it is important to note that not all laboratories function at the same level of proficiency and that different methods in use at a particular laboratory have differing levels of precision. Each laboratory has its own inherent SD (for a specific concentration level and analyte-method pair) based on the analytical process and this SD is not directly related to the round robin program. The majority of data generated in the round robin program was produced by a selection of world class laboratories. The SD s thus generated are more constrained than those that would be produced across a randomly selected group of laboratories. To produce more generally achievable SD s the pooled SD s provided in this report include inter-lab bias. This one size fits all approach may require revision at the discretion of the QC manager concerned following careful scrutiny of QC control charts. Table 4 shows Performance Gates calculated for two and three standard deviations. As a guide these intervals may be regarded as warning or rejection for multiple 2SD outliers, or rejection for individual 3SD outliers in QC monitoring, although their precise application should be at the discretion of the QC manager concerned. A second method utilises a 5% window calculated directly from the certified value. Standard deviation is also shown in relative percent for one, two and three relative standard deviations (1RSD, 2RSD and 3RSD) to facilitate an appreciation of the magnitude of these numbers and a comparison with the 5% window. Caution should be exercised when concentration levels approach lower limits of detection of the analytical methods employed as performance gates calculated from standard deviations tend to be excessively wide whereas those determined by the 5% method are too narrow. COA-1145-OREAS216.docx Page: 5 of 9

40 Table 4. Performance Gates for OREAS 216. Constituent Certified Value 1SD Absolute Standard Deviations Relative Standard Deviations 5% window 2SD Low 2SD High 3SD Low 3SD High 1RSD 2RSD 3RSD Low High Fire Assay Au, ppm % 4.67% 7.01% Aqua Regia Digestion Au, ppm % 6.25% 9.38% Tolerance Limits (ISO Guide 3207) were determined by NAA using the reduced analytical subsample method which utilises the known relationship between standard deviation and analytical subsample weight (Ingamells and Switzer, 1973). In this approach the sample aliquot is substantially reduced to a point where most of the variability in replicate assays should be due to inhomogeneity of the reference material and measurement error becomes negligible. In this instance a subsample weight of 85 milligrams was employed and the 1RSD (across the twenty subsamples) of 1.06%, or 0.06% at a conventional 30g fire assay charge weight, confirms the exceptional level of gold homogeneity in OREAS 216. The homogeneity is of a level such that no sampling error exists for a conventional fire assay or aqua regia determination. The meaning of tolerance limits may be illustrated for gold by fire assay, where 99% of the time (1-α=0.99) at least 95% of subsamples (ρ=0.95) will have concentrations lying between 6.64 and 6.67ppm. Put more precisely, this means that if the same number of subsamples were taken and analysed in the same manner repeatedly, 99% of the tolerance intervals so constructed would cover at least 95% of the total population, and 1% of the tolerance intervals would cover less than 95% of the total population (ISO Guide 35). The homogeneity of OREAS 216 has also been evaluated in a nested ANOVA of the round robin program. Each of the thirty-three round robin laboratories received six samples per CRM and these samples were made up of paired samples from three different, non-adjacent sampling intervals. The purpose of the ANOVA evaluation is to test that no statistically significant difference exists in the variance between-units to that of the variance within-units. This allows an assessment of homogeneity across the entire prepared batch of OREAS 216. The test was performed using the following parameters: Gold Fire Assay 192 samples (32 laboratories each providing analyses on 3 pairs of samples); Aqua Regia Digestion 114 samples (19 laboratories each providing analyses on 3 pairs of samples); Significance Level α = P (type I error) = 0.05; Null Hypothesis, H 0 : Between-unit variance is no greater than within-unit variance (reject H 0 if p-value < 0.05); Alternative Hypothesis, H 1 : Between-unit variance is greater than within-unit variance. P-values are a measure of probability where values less than 0.05 indicate a greater than 95% probability that the observed differences in within-unit and between-unit variances are real. The dataset was filtered for both individual and laboratory data set (batch) outliers prior to the calculation of the p-value. This process derived p-values of 0.54 for Au by fire assay COA-1145-OREAS216.docx Page: 6 of 9

41 and 0.51 for Au by aqua regia digestion. Both p-values are insignificant and the Null Hypothesis is retained. It is important to note that ANOVA is not an absolute measure of homogeneity. Rather, it establishes whether or not the analytes are distributed in a similar manner throughout the packaging run of OREAS 216 and whether the variance between two subsamples from the same unit is statistically distinguishable to the variance from two subsamples taken from any two separate units. A reference material therefore, can possess poor absolute homogeneity yet still pass a relative homogeneity test if the within-unit heterogeneity is large and similar across all units. Based on the statistical analysis of the results of the inter-laboratory certification program it can be concluded that OREAS 216 is fit-for-purpose as a certified reference material (see Intended Use below). PARTICIPATING LABORATORIES 1. Actlabs, Ancaster, Ontario, Canada 2. ALS, Brisbane, QLD, Australia 3. ALS, Johannesburg, South Africa 4. ALS, Lima, Peru 5. ALS, Loughrea, Galway, Ireland 6. ALS, Perth, WA, Australia 7. ALS, Reno, Nevada, USA 8. ALS, Vancouver, BC, Canada 9. American Assay Laboratories, Sparks, Nevada, USA 10. ANSTO, Lucas Heights, NSW, Australia 11. Bureau Veritas Commodities Canada Ltd, Vancouver, BC, Canada 12. Bureau Veritas Geoanalytical, Adelaide, SA, Australia 13. Bureau Veritas Geoanalytical, Perth, WA, Australia 14. Bureau Veritas Minerals, Santiago, Chile 15. Inspectorate America Corporation (BV), Sparks, Nevada, USA 16. Inspectorate de Mexico (BV), S.A. de C.V., Hermosillo, Sonora, Mexico 17. Intertek Genalysis, Adelaide, SA, Australia 18. Intertek Genalysis, Perth, WA, Australia 19. Intertek Testing Services, Cupang, Muntinlupa, Philippines 20. Intertek Testing Services, Hidden Valley, Wau, PNG 21. Intertek Testing Services, Shunyi, Beijing, China 22. McClelland Laboratories Inc., Sparks, Nevada, USA 23. Ok Tedi Mine Lab, Mt Fubilan, Western Province, PNG 24. PT Geoservices Ltd, Cikarang, Jakarta Raya, Indonesia 25. PT Intertek Utama Services, Jakarta Timur, DKI Jakarta, Indonesia 26. SGS Australia Mineral Services, Perth (Newburn), WA, Australia 27. SGS Canada Inc., Vancouver, BC, Canada 28. SGS del Peru, Lima, Peru 29. SGS Geosol Laboratorios Ltda, Vespasiano, Minas Gerais, Brazil 30. SGS Lakefield Research Ltd, Lakefield, Ontario, Canada 31. SGS Mineral Services, Townsville, QLD, Australia 32. SGS South Africa Pty Ltd, Booysens, Gauteng, South Africa 33. Skyline, Sparks, Nevada, USA 34. TSL Laboratories Inc., Saskatoon, Saskatchewan, Canada COA-1145-OREAS216.docx Page: 7 of 9

42 PREPARER AND SUPPLIER OF THE REFERENCE MATERIAL Reference material OREAS 216 has been prepared, certified and is supplied by: ORE Research & Exploration Pty Ltd Tel: A Hosie Street Fax: Bayswater North VIC 3153 Web: AUSTRALIA It is available in unit sizes of 60 and 100g (single-use laminated foil pouches) and 1kg (plastic jars). INTENDED USE OREAS 216 is intended for the following uses: for the monitoring of laboratory performance in the analysis of gold by fire assay and aqua regia digestion in geological samples; for the verification of gold fire assay and aqua regia digestion methods; for the calibration of instruments used in the determination of gold. STABILITY AND STORAGE INSTRUCTIONS OREAS 216 has been prepared from primary gold ore diluted with barren greenstone. It is low in reactive sulphide (~0.76 wt.%) and in its unopened state and under normal conditions of storage has a shelf life beyond ten years. Its stability will be monitored at regular intervals and purchasers notified if any changes are observed. INSTRUCTIONS FOR CORRECT USE The certified values for OREAS 216 refer to the concentration level in its packaged state. It should not be dried prior to weighing and analysis. HANDLING INSTRUCTIONS Fine powders pose a risk to eyes and lungs and therefore standard precautions such as the use of safety glasses and dust masks are advised. TRACEABILITY The analytical samples were selected in a manner to represent the entire batch of prepared CRM. This representivity was maintained in each submitted laboratory sample batch and ensures the user that the data is traceable from sample selection through to the analytical results that underlie the consensus values. Each analytical data set has been validated by its assayer through the inclusion of internal reference materials and QC checks during analysis. The laboratories were chosen on the basis of their competence COA-1145-OREAS216.docx Page: 8 of 9

43 (from past performance in inter-laboratory programs) for a particular analytical method, analyte or analyte suite, and sample matrix. Most of these laboratories have and maintain ISO accreditation. The certified values presented in this report are calculated from the means of accepted data following robust statistical treatment as detailed in this report. LEGAL NOTICE Ore Research & Exploration Pty Ltd has prepared and statistically evaluated the property values of this reference material to the best of its ability. The Purchaser by receipt hereof releases and indemnifies Ore Research & Exploration Pty Ltd from and against all liability and costs arising from the use of this material and information. QMS ACCREDITED ORE Pty Ltd is accredited to ISO 9001:2008 by Lloyd s Register Quality Assurance Ltd for its quality management system including development, manufacturing, certification and supply of CRMs. CERTIFYING OFFICER Craig Hamlyn (B.Sc. Hons - Geology), Technical Manager - ORE P/L REFERENCES Ingamells, C. O. and Switzer, P. (1973), Talanta 20, ISO Guide 30 (1992), Terms and definitions used in connection with reference materials. ISO Guide 31 (2000), Reference materials Contents of certificates and labels. ISO Guide 3207 (1975), Statistical interpretation of data - Determination of a statistical tolerance interval. ISO Guide 35 (2006), Certification of reference materials - General and statistical principals. COA-1145-OREAS216.docx Page: 9 of 9