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Mexico
Don David (Arista Mine, Mirador - Alta Gracia Mine)

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 Location:
75 km SE from Oaxaca de Juárez, Oaxaca, Mexico

  Address:

San José de Gracia
Oaxaca, Mexico
70484
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
  • Silver
  • Copper
  • Lead
  • Zinc
Mining Method
  • Overhand Cut & Fill
  • Longhole open stoping
  • Paste backfill
  • Backfill
Production Start...
Mine Life2027
Don David Gold Mine(DDGM) operations include the Arista underground mine and the processing facility. The DDGM processing facility currently produces doré and metal concentrates from ore mined at the Arista Mine. Additionally, underground mining at the Alta Gracia mine was conducted from 2017 to 2019.
Latest NewsGold Resource Corporation Reports Continued Positive Drill Results at Don David Gold Mine     September 13, 2023


Owners

Source: p. 6,26
CompanyInterestOwnership
Gold Resource Corp. 100 % Indirect
Gold Resource operations in Oaxaca are conducted through a Mexican subsidiary, Don David Gold Mexico S.A. de C.V. (“DDGM”).

At Don David Gold Mine, the Company currently has 100% interest in six properties, including two Production Stage Properties and four Exploration Stage Properties, located in Oaxaca, Mexico, along the San Jose structural corridor.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Epithermal


Summary:

Mineral Deposit Types
The San Jose de Gracia and Alta Gracia gold-silver sub-districts of the Don David Mine are characterized by classic, high grade silver-gold, epithermal vein deposits with low to intermediate-sulfidation mineralization quartz-adularia-sericite alteration. The veins are typical of most epithermal silver-gold vein deposits in Mexico with respect to the volcanic or sedimentary host rocks and the paragenesis and tenor of mineralization. The Alta Gracia mineralization is typical of a low sulfidation deposit. The Arista mine vein systems are intermediate-sulfidation in nature and standard of many Mexican deposits, characterized by Camprubí & Albinson, 2007, and described as Polymetallic Ag-Au by Corbett.

Description of Mineralized Zones
The Don David Mine mineralization occurs as structurally controlled epithermal deposits in veins and stockwork zones consisting of concentrations of sulfides containing gold, silver, lead, copper, and zinc, associated with gangue minerals such as quartz calcite and other minor minerals. The economic mineralization at the Arista Mine is gold, silver, copper, lead, and zinc. Structurally controlled epithermal veins and stockwork zones at Alta Gracia Project (Mirador Mine) contain mainly silver-gold bearing sulfides. The economic mineralization currently exploited at the Alta Gracia Project is only gold and silver.

Primary sulfide mineralization within the mineralized structures contains pyrite, gale ........


Mining Methods

  • Overhand Cut & Fill
  • Longhole open stoping
  • Paste backfill
  • Backfill


Summary:

In 2021, mining activities were completed in the open pit, and it will now become the site for filtered dry stack tailings deposition.

There are two main mining methods used in the Arista mine: 1) overhand mechanized cut and fill (CAF) and 2) long-hole open stoping (LHOS) with delayed fill. Paste fill, cemented rock fill and uncemented rock fill are applied to long-hole stoping areas in order to increase extraction levels (removal of rib pillars), CAF uses uncemented rock fill as a backfill method.

For the stoping methods, a crosscut from the main ramp intersects the vein, from which an initial drift is excavated perpendicular in both directions along the strike length of the vein. Once the economic limits of the vein have been reached the production cycle starts.

Overhand Mechanized Cut and Fill (CAF)
A CAF stope is started by means of a short (40 to 60 meter) negative 15 percent access ramp usually in the footwall of the vein to provide access to the bottom of the mining block. The ore is then mined in 3-meter horizontal slices using a Jumbo drill (Figure 13.3). The jumbo will drill 4-meter long essentially parallel and horizontal 1-3/4-inch holes that will later be charged with explosives to “breast down” and break the ore.

The length of these mining blocks can vary from 50 to 250 meters in strike length. After the first slice or cut is complete, the void will be filled with loose waste rock to form the floor of the next cu ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:
In the first and second quarter in 2022, combined tonnes milled includes 1,043 and 215 purchased tonnes, respectively, related to an environmental initiative with a local community.

CommodityProductUnits2023202220212020201920182017
Gold Payable metal koz  ......  Subscription required ^
Silver Payable metal oz  ......  Subscription required ^
Gold Metal in conc./ doré koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required2728
Silver Metal in conc./ doré oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Daily milling rate  ......  Subscription required  ......  Subscription required1.83 kt1,980 t1,764 t1,301 t
Daily milling capacity  ......  Subscription required  ......  Subscription required1,800 t
Waste  ......  Subscription required  ......  Subscription required
Tonnes milled  ......  Subscription required  ......  Subscription required565.35 kt693,173 t611,670 t449,177 t
Waste OP+UG  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Reserves at December 31, 2022:
The Arista Mine cut-off grades for Mineral Reserves and Resources are $80/tonne NSR. A breakeven cut-off grade of 2.35 g/t AuEq was used for Alta Gracia Mine Mineral Reserves and Resources using gold and silver only to calculate gold equivalencies.

CategoryTonnage CommodityGrade
Proven & Probable 1,410,900 t Gold 1.14 g/t
Proven & Probable 1,410,900 t Silver 97 g/t
Proven & Probable 1,357,100 t Copper 0.26 %
Proven & Probable 1,410,900 t Lead 0.94 %
Proven & Probable 1,410,900 t Zinc 2.89 %
Measured & Indicated 1,613 kt Gold 1.23 g/t
Measured & Indicated 1,613 kt Silver 141.07 g/t
Measured & Indicated 1,499 kt Copper 0.31 %
Measured & Indicated 1,499 kt Lead 1.18 %
Measured & Indicated 1,499 kt Zinc 3.3 %
Inferred 2,064 kt Gold 0.79 g/t
Inferred 2,064 kt Silver 124.22 g/t
Inferred 1,916 kt Copper 0.25 %
Inferred 1,916 kt Lead 1.18 %
Inferred 1,916 kt Zinc 3.03 %

Commodity Production Costs:

CommodityUnits2023202220212020201920182017
Credits (by-product) Gold Equivalent USD  ......  Subscription required -1,638 / oz   -1,219 / oz  
Total cash costs (sold) Gold Equivalent USD  ......  Subscription required 1,722 / oz   1,294 / oz  
Total cash costs (sold) Gold Equivalent USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 84 / oz†   75 / oz†  
All-in sustaining costs (sold) Gold Equivalent USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 655 / oz†   590 / oz†  
All-in costs Gold Equivalent USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 617 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2022202120202019
Total operating costs ($/t milled) USD 164  144  107  104  

Financials:

Units2022202120202019201820172016
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 20.6   21.2   11.3  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required 24   21.8   12.4  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 115.3   110.2   83.2  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 33.7   42.1   22.4  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 20.6   20.4   14.7  
Subscription required - Subscription is required


Water Supply
Source: Subscription required

- subscription is required.


Heavy Mobile Equipment as of December 31, 2022:
HME TypeSizeQuantity
Bolter ....................... Subscription required
Drill (long hole) ....................... Subscription required
Jumbo ....................... Subscription required
Loader ....................... Subscription required
Personnel Carrier ....................... Subscription required
Scissor Lift ....................... Subscription required
Scoop Tram 6 cu. yd ....................... Subscription required
Scoop Tram 2.5 cu. yd ....................... Subscription required
Truck (boom) ....................... Subscription required
Truck (fuel / lube) ....................... Subscription required
Truck (underground) 17 cu. m ....................... Subscription required
Truck (underground) 10 cu. m ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 5, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 5, 2023
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 5, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 5, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 5, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 5, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 5, 2023
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2022
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Annual Report 2022
Form 10-K 2022
Sustainability Report 2022
Technical Report 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Annual Report 2018
Press Release 2018
Form 10-K 2017
Annual Report 2016
Form 10-K 2016
Year-end Mineral Reserves 2015
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News:

NewsDate
Gold Resource Corporation Reports Continued Positive Drill Results at Don David Gold Mine September 13, 2023

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