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Mexico
Rodeo Mine

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 Location:
126 km N from Durango, Durango, Mexico

  Regional Office:
Calle Rio Tamesis, No. 2505 Col. Las Magdalenas
Torreon
Coahuila, Mexico
C.P. 27010
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Processing
  • Filter press plant
  • Counter current decantation (CCD)
  • Agitated tank (VAT) leaching
  • Merrill–Crowe
  • Cyanide (reagent)
Mine Life2 years (as of Jan 1, 2021)
Latest NewsGolden Minerals Files Updated PEAs for Velardeña and Rodeo Projects     May 6, 2022


Owners

Source: p. 9
CompanyInterestOwnership
Golden Minerals Company 100 % Indirect
The property is currently held by Minera de Cordilleras S.A. de C.V., a wholly owned subsidiary of Golden Minerals Company.

Deposit Type

  • Epithermal
  • Vein / narrow vein


Summary:

The Rodeo property hosts gold- and silver-bearing mineralization commonly associated with a low-sulfidation (adularia-sericite) epithermal mineralizing system. Epithermal systems are defined to occur from depths of less than 2 km to superficial hot spring settings. Mineral deposition occurs as hydrothermal fluids undergo cooling and degassing and are commonly zoned vertically over 250 to 350 m from a base metal-poor, gold- and silver-rich top to a relatively silver-rich base metal zone and an underlying base metal-rich zone grading at depth into a sparse base metal, pyritic zone.

The immediate Rodeo deposit area is approximately 300 m along strike and 200 m wide and extends to a depth of 200 m below surface. The deposit strikes at 330° and dips to the ENE with various vein phases dipping from sub-vertical to 30°. The deposit is entirely hosted within Tertiary Rodeo volcanics that are strongly silicified and brecciated. The deposit is bounded to the east by the Rodeo Fault, however drilling to date has not demonstrated that the deposit reaches or is truncated by the fault. Along strike to the north and south, the mineralization is offset slightly by near vertical faulting; mineralization does not terminate at these faults, but the intensity of the trend is either diminished or high-grade mineralization has yet to be located.

Mineralization at the deposit is epithermal low-sulfidation (quartz-adularia) type. Although very little mineralization is hosted in or centered on the Rodeo Fault itself, it is possible that the fault played a role as a pathway at depth for the Rodeo deposit. Quartz veins 15 m or greater in width have been located throughout the property. The high-grade Au mineralization appears limited to a distinctive veining event. Evidence of ancillary veining events pre- and post-dating the high-grade event carry low-grade to anomalous level of Au mineralization.

The gold event is associated with a restricted vein stage characterized by small smoky quartz veinlets cut by banded blue opaline quartz and later brecciated and cemented by glassy smoky quartz hosting very fine disseminated pyrite. In the main zone, the veinlets generally trend NNW and dip steeply to the east or west, but the core angle in some drill holes suggests these veins may also have developed along ENE to EW structures. The envelope of the high-grade event appears to be restricted to a preferential volcanic layer or elevation (or both). Movement on the Rodeo Fault is likely responsible for the current orientation of the envelope.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Due to the near-surface nature and continuity of the orebody, mining at Rodeo is conducted with open pit mining methods. Blasted material is mined with a diesel excavator and loaded into on-highway trucks for haulage to the plant site approximately 115 km away from the mine. Loading and hauling to the plant is typically carried out on the weekdays during the morning, to ensure adequate mineralized material delivery while allowing for mining of waste and low-grade materials to occur later in the day. If needed to supply mill feed, haulage to the plant may continue over the weekend. Separating the mining activities based on haulage destinations allows for more efficient use of resources, while creating a safer working environment.

There are four stockpiles at the mine site for stockpiling mineralized material for potential future processing, and additional stockpiling area exists at the plant to allow for better material management and potential blending. Mine production averages 2,100 tpd of total movement and the pit has an expected mine life of 22 months. Figure 13-1 shows the final pit outline for the Rodeo Project. Mining is conducted in 5 m benches which are double benched to 10 m.

Mining and hauling to the plant are carried out using contractors. Labor requirements are minimal and are provided by the contractor. Golden Minerals personnel are responsible for blasthole sampling, supervisory, administrative, and engineering tasks.


Crushing and Grinding
Flow Sheet: Source
Crusher / Mill TypeModelSizePowerQuantity
Jaw crusher 1
Cone crusher 1
Ball mill 10.5' x 13' 1
Regrind 8' x 22' 1

Summary:

A jaw crusher followed by a cone crusher provide primary and secondary crushing of feed material. Crushed material enters a grinding circuit comprised of a 10.5 x 13 ft ball mill and a recently installed 8 x 22 ft regrind (secondary) mill, both in closed circuit with cyclones.


Processing

  • Filter press plant
  • Counter current decantation (CCD)
  • Agitated tank (VAT) leaching
  • Merrill–Crowe
  • Cyanide (reagent)

Flow Sheet: Subscription required

Summary:

Mineralized material from the Rodeo mine is hauled approximately 115 km via on-highway trucks and stockpiled for process at the agitated leach plant in Velardeña, Durango (Plant 2). The plant is owned by Minera William S.A. de R.L. de C.V. and operated by Servicios Velardeña S.A. de C.V., both wholly owned subsidiaries of Golden Minerals. The plant has a design maximum throughput of 520 tpd and is currently operating at an average rate of 500 tpd.

The product from the mills at 80% passing 325 mesh is thickened and sent to a series of eight agitated lixiviation tanks where cyanide is added with a planned consumption of 3.0 to 3.1 kg/t, and precious metals are leached from the mineralized material at a design flow rate of 1,700 m3/day and a total leaching time of 84 hours. Rich solution is separated using countercurrent decantation and sent to the Merrill-Crowe circuit for clarification and precipitation of the gold and silver that is then refined into gold and silver doré b ........

Recoveries & Grades:

CommodityParameter20222021
Gold Head Grade, g/t  ......  Subscription required  ......  Subscription required
Silver Head Grade, g/t  ......  Subscription required  ......  Subscription required
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required
Silver Recovery Rate, %  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.

Production:

CommodityProductUnits20222021LOM (Projected)
Gold Payable metal oz  ......  Subscription required ^33,540
Silver Payable metal oz  ......  Subscription required ^  ......  Subscription required
Gold Metal in doré oz  ......  Subscription required33,879
Silver Metal in doré oz  ......  Subscription required  ......  Subscription required
Gold Equivalent Metal in doré oz  ......  Subscription required
Gold Equivalent Payable metal oz  ......  Subscription required
^ Guidance / Forecast.

Operational Metrics:

Metrics20222021
Daily processing rate  ......  Subscription required  ......  Subscription required
Total tonnes mined  ......  Subscription required  ......  Subscription required
Tonnes processed  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Reserves at October 31, 2021:
Resources have been tabulated using a 1.0 g/t Au cutoff grade for stock piling and 1.6 g/t Au for processing.

CategoryOreTypeTonnage CommodityGradeContained Metal
Measured Stockpiles 208,500 t Gold 1.24 g/t 8,350 oz
Measured In-Situ (OP) 310,700 t Gold 3.11 g/t 31,100 oz
Measured Stockpiles 208,500 t Silver 10.03 g/t 67,200 oz
Measured In-Situ (OP) 310,700 t Silver 13.1 g/t 131,000 oz
Indicated Stockpiles 56,400 t Gold 1.18 g/t 2,140 oz
Indicated In-Situ (OP) 43,700 t Gold 3.17 g/t 4,500 oz
Indicated Stockpiles 56,400 t Silver 5.18 g/t 9,400 oz
Indicated In-Situ (OP) 43,700 t Silver 10.67 g/t 15,000 oz
Measured & Indicated Stockpiles 264,900 t Gold 1.23 g/t 10,500 oz
Measured & Indicated In-Situ (OP) 354,400 t Gold 3.12 g/t 35,600 oz
Measured & Indicated Stockpiles 264,900 t Silver 9 g/t 76,600 oz
Measured & Indicated In-Situ (OP) 354,400 t Silver 12.8 g/t 146,000 oz
Inferred Stockpiles 1,500 t Gold 1.2 g/t 58 oz
Inferred Stockpiles 1,500 t Silver 4.09 g/t 198 oz

Commodity Production Costs:

CommodityUnits2021
Cash costs Gold USD
Credits (by-product) Silver USD  ......  Subscription required
Total cash costs Gold USD  ......  Subscription required
Total cash costs Gold USD  ......  Subscription required†
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2021
Total operating costs ($/t milled) USD 96

Financials:

Units2021
Revenue M USD  ......  Subscription required
Subscription required - Subscription is required


Heavy Mobile Equipment as of October 31, 2021:
HME TypeQuantityLeased or
Contractor
Bulldozer ....................... Subscription required Leased
Compactor ....................... Subscription required Leased
Drill ....................... Subscription required Leased
Excavator ....................... Subscription required Leased
Grader ....................... Subscription required Leased
Loader ....................... Subscription required Leased
Truck (haul) ....................... Subscription required Leased
Truck (water) ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 9, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 8, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 8, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
Subscription required - Subscription is required.

News:

NewsDate
Golden Minerals Files Updated PEAs for Velardeña and Rodeo Projects May 6, 2022
Golden Minerals Reports Full Year 2021 Results March 23, 2022
Golden Minerals Completes Updated Technical Reports for Two Properties March 22, 2022
Golden Minerals Company Produces 14,449 oz Gold During 2021, Exceeding Guidance January 12, 2022
Golden Minerals Drills 18m Grading 2.9 g/t Gold at Rodeo Gold-Silver Mine October 19, 2021
Golden Minerals Commences Reverse Circulation Drill Program; Drills 13.9m Grading 2.9 g/t Au at Rodeo Gold-Silver Mine September 16, 2021
Golden Minerals Announces Positive Initial Results from its Rodeo Gold-Silver Mine Expansion Drilling, Including 14.7m @ 3.94 g/t Au June 10, 2021
Golden Minerals Announces First Gold Pour at Rodeo February 1, 2021
Golden Minerals Company Begins Gold Production January 13, 2021
Golden Minerals Receives Final Environmental Permits for Rodeo Gold Project; Company on Track for January 2021 Gold Production November 17, 2020
Golden Minerals Drills 30.3m Grading 3.1 g/t Au at the Rodeo Gold Project October 1, 2020
Golden Minerals Drills 24m Grading 6.7 g/t Au at its Rodeo Gold Project, Durango, Mexico August 26, 2020
Golden Minerals Drills 23.4m Grading 5.96 g/t Au at Rodeo Gold Project, Durango, Mexico August 11, 2020
Golden Minerals Announces Sedar Filing of Preliminary Economic Assessment for Rodeo Gold Project May 28, 2020
Golden Minerals Announces Preliminary Economic Assessment for Rodeo Gold Project April 15, 2020

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