Projects

Resource Tables

Golden Minerals Company Properties: Resources and Grades

(1) Resources prepared March 2022 as defined under U.S. SEC Regulation S-K 1300.

  Measured Mineral Resources Indicated Mineral Resources Measured + Indicated Mineral Resources Inferred Mineral Resources
  Amount tonnes Grade g/t Quantity oz Amount tonnes Grade g/t Quantity oz Amount tonnes Grade g/t Quantity oz Amount tonnes Grade g/t Quantity oz
Gold                        
Rodeo mine                        
High-grade 286,100 3.00 27,600 43,500 3.17 4,400 329,600 3.02 32,000      
Low-grade (stockpile) 201,100 1.24 8,000 55,500 1.18 2,100 256,500 1.23 10,100 1,500 1.21 100
Velardeña Properties 385,000 5.58 69,000 883,800 4.88 138,500 1,268,800 5.09 207,500 1,709,200 4.8 263,800
Total oz      104,600     145,000     249,600     263,900
                         
Silver                        
Rodeo mine                        
High-grade 286,100 13.4 123,000 43,500 10.7 14,900 329,600 13.0 138,000      
Low-grade (stockpile) 201,100 10.2 65,800 55,500 5.2 9,300 256,500 9.1 75,100 1,500 4.10 200
Velardeña Properties 385,000 327 4,050,800 883,800 316 8,980,600 1,268,800 319 13,031,400 1,709,200 362 19,893,600
Total oz     4,239,600     9,004,800     13,244,500     19,893,800

 

(2) Resources prepared in accordance with Canadian National Instrument 43-101 - Standards of Disclosure of Mineral Projects (“NI 43-101”) prior to January 1, 2021:

        Grade
  Tonnes Silver Gold Silver Gold
  (M) (Moz) (koz) g/t g/t
EL QUEVAR          
Indicated 2.93 45.30 - 482 n/a
Inferred 0.31 4.10 - 417 n/a
SANTA MARIA          
Measured 0.04 0.37 1.1 271 0.8
Indicated 0.17 1.59 5.7 291 1.0
Inferred 0.26 2.30 7.6 272 0.9
           
M&I 3.14 47.26 6.80    

 

(3) Total Company Resources

  Grade
  Tonnes Silver Gold Silver Gold
  (M) (Moz) (koz) g/t g/t
RODEO Measured 0.5 0.2 35.6 12.0 2.3
  Indicated 0.1 0.0 6.5 8.0 2.1
VELARDEÑA Measured 0.4 4.1 69.0 327.0 5.6
  Indicated 0.9 9.0 138.5 316.0 4.9
  Inferred 1.7 19.9 263.8 362.0 4.8
EL QUEVAR Indicated 2.9 45.3 - 482.0 n/a
  Inferred 0.3 4.1 - 417.0 n/a
SANTA MARIA Measured 0.0 0.4 1.1 271.0 0.8
  Indicated 0.2 1.6 5.7 291.0 1.0
  Inferred 0.3 2.3 7.6 272.0 0.9
             
Total Company M&I 5.0 60.5 256.4    

RESOURCE NOTES:

  • Velardeña: March 2022. “Velardeña Project Technical Report Summary” prepared by Tetra Tech. Initial Assessment for the property as defined under U.S. SEC Regulation S-K 1300. Two economic models were prepared for the Project: one includes Inferred Mineral Resources (MII Plan) in the analysis, and the second excludes the Inferred material (MI Plan). The economic model results are based on Mineral Resources that, by definition, are not Mineral Reserves, and do not have demonstrated economic viability. The TRS assumes prices of $1,744/oz gold, $23.70/oz silver, $0.97/pound (“lb”) lead (“Pb”) and $1.15/lb zinc (“Zn”). Mineral resources were calculated having an effective date of February 28, 2022, as diluted to a minimum of 0.7 meters and are reported at a $175 NSR cutoff.
  • Rodeo: March 2022. “Rodeo Project Technical Report Summary” prepared by Tetra Tech. Initial Assessment for the property as defined under U.S. SEC Regulation S-K 1300. The Rodeo mine is currently in operation and the Rodeo TRS assumes a life of mine (“LOM”) starting point of November 1, 2021. The TRS assumes prices of $1,800/oz Au and $25.00/oz Ag. Mineral resources were calculated by Tetra Tech with an effective date of October 31, 2021 as shown in the Technical Report Summary. After adjusting for mineral extraction at Rodeo for November and December 2021, the estimate of mineral resources at the Rodeo Property at December 31, 2021 is shown in the table above.  Aaron Amoroso, an employee of the Company and “qualified person” pursuant to S-K 1300, prepared the estimate.  The resources are reported at a cutoff of 1 g/t for stockpiling and 1.6 g/t for processing.  Numbers reported as mineral resource are constrained to a mine design of 1 g/t.
  • El Quevar: February 2018. Resources prepared in accordance with Canadian National Instrument 43-101 - Standards of Disclosure of Mineral Projects (“NI 43-101”). Amec Foster Wheeler E&C Services, Inc., a Wood Group PLC company. "NI 43-101 Technical Report on Updated Mineral Resource Estimate", February 26, 2018. Cutoff grade 250 g/t.
  • Santa Maria: September 2018. Resources prepared in accordance with Canadian National Instrument 43-101 - Standards of Disclosure of Mineral Projects (“NI 43-101”). Tetra Tech. "Technical Report & Updated Preliminary Economic Assessment", September 14, 2018. Silver equivalents calculated at 74:1. Cutoff grade 180 g/t.

Mexico Quality Assurance/Quality Control Process (September 12, 2022 press release)

Yoquivo diamond drilling was conducted by Eco Drilling México S. de R.L. de C.V with a Coretech CSD 1300G rig. Drill holes were drilled to depths ranging from 150m to 351m and were drilled at azimuths of 107° to 347o and a dip ranging from -45o to -76°. No water was encountered during drilling. Holes were positioned with a hand-held GPS (accuracy +/- 5 meters) and later surveyed with a Differential GPS once the drilling campaign was completed.

Samples of the core were obtained using a diamond saw to cut the core in half, retaining one half for a permanent core record, and the other sent for analysis.

Drill-core samples were shipped to ALS Chemex sample preparation facility in Chihuahua, Chihuahua, Mexico for sample preparation and for analysis at the ALS laboratory in North Vancouver, British Columbia, Canada. The ALS Chihuahua and North Vancouver facilities are ISO 9001 and ISO/IEC 17025 certified. ALS Global in North Vancouver is a facility certified as ISO 9001:2008 and accredited to ISO/IEC 17025:2005 from the Standards Council of Canada. 

Samples were crushed to 70% passing 2mm (PREP-31) with a split of up to 250 grams pulverized to 85% passing 75 micrometers (-200 mesh). The sample pulps and crushed splits were transferred internally to ALS Global’s North Vancouver analytical facility for gold and multi-element analysis. Pulps (30 gram split) are submitted for Au analysis by fire assay with atomic absorption finish (Au-AA23) and silver samples were analyzed by atomic absorption (Ag-AA45).

Over-limit Au (>10.0 g/t Au) and Ag (>1500 g/t Ag) samples are analyzed by fire assay with gravimetric finish (Au-GRA22 and Ag-GRA21). Over-limit base metal samples (>10,000 ppm or 1%) are re-analyzed inductively coupled plasma atomic emission spectrometry using protocols for higher grade results (ICP-AES) for Cu, Pb and Zn (Cu-OG62, Pb-OG62, Zn-OG62).

In-house quality control samples (blanks, standards, duplicates, preparation duplicates) were inserted into the sample set by Golden Minerals. ALS Global conducts its own internal QA/QC program of blanks, standards and duplicates, and the results were provided with the Company sample certificates. The results of the ALS control samples were reviewed by Golden Minerals and the Company’s QP and evaluated for acceptable tolerances.

All sample and pulp rejects are stored at the Company’s secure warehouse in Velardeña, Durango pending full review of the analytical data, and future selection of pulps for independent third-party check analyses, if required.