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Mexico
Arista Mine (Don David Operation)

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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
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
  • Silver
  • Copper
  • Zinc
  • Lead
Mining Method
  • Overhand Cut & Fill
  • Longhole open stoping
  • Cemented backfill
  • Backfill
Production Start...
Mine Life2025
Arista Mine is a part of Don David Operation.

The exploration program at the Arista Project during 2022 continued to focus on expanding known mineralization on the Arista, Switchback, and the Three Sisters vein systems at the Arista underground mine. Exploration and development of these vein systems remain the highest exploration priority.


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
  • Cemented backfill
  • Backfill


Summary:

Conventional drill and blast methods are currently used to extract ore from the Arista underground mine. There are two main mining methods used in the Arista underground mine: 1) overhand mechanized cut and fill (“CAF”) and 2) long-hole open stopping (“LHOS”) with delayed fill.

DDGM has advanced the primary decline ramp down to Level 28, approximately 4,400 meters ramp distance from the mine portal. DDGM has also constructed a safety/ventilation decline ramp in conjunction with the primary decline ramp along with various drifts, raises and stopes encompassing approximately 500 m vertically and 1,300 m along strike length.

Access to the mining areas is provided mainly by ramps. Mine development headings are either drilled by jumbo or by jackleg. The dimensions of the different development sections are as follows:
• Main Ramps: 5. W x 5 H meters
• Accesses: 4.5 W x 4 H meters
• Sill in Mineral 4.5 W x 4 Hmeters (if wider width of structure)
• Raise: 2 x 2 meters
• Bore Holes Raise: 3.1 meters diameter

Conventional drill and blast methods are used to extract the Mineral Resources from the Arista mine at the Arista project.

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 leve ........


Crushing and Grinding
Flow Sheet: Source

Crushing and Milling
Ore is trucked from the mine and discharged onto ground. Ore is fed in a primary jaw crusher using a front head loader. Crushed ore from the primary crusher is screened onto a double deck screen. The first deck product is crushed by the secondary cone crusher. Crushed material is recirculated to feed the double deck screen. The screen second deck oversized products are crushed by a tertiary cone crusher. The tertiary cone crusher material is also recirculated to the feed of double deck screen. Finally, the double deck fine particle (-9.5mm) is stockpiled before being fed into the ball mills. The maximum crushing rate for this plant is about 110 tonnes per hour. The fine ore is stockpiled before being fed into the crusher and ball mills.

The fine crushed ore is transported via conveyor belts to the flotation plant grinding circuit. Grinding circuit consists of two parallel ball mills. Each mill is in close circuit hydrocyclones, with cyclone overflow reporting to flotation circuit. A portion of the cyclone underflow reports to the gravity circuit, while the remainder of the cyclone underflow and gravity circuit tailing reports to the ball mill for further grinding. One ball mill is 3.2m diameter and 4.29m length driven by 798 kW motor. The second ball mill is 3.2m diameter and 3.68m length driven by 597 kW motor.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityProductUnits202220212020201920182016
Gold Metal in conc./ doré oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Metal in conc./ doré oz  ......  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
Zinc 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
Gold Metal in concentrate oz 027,628
Silver Metal in concentrate oz  ......  Subscription required  ......  Subscription required
Gold Equivalent Metal in concentrate oz  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics202220212020201920182017
Tonnes milled  ......  Subscription required  ......  Subscription required506,747 t629,868 t560,191 t400,748 t
Daily milling rate  ......  Subscription required  ......  Subscription required1,301 t
Daily milling capacity  ......  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.

CategoryTonnage CommodityGrade
Proven & Probable 1,357,100 t Gold 1.17 g/t
Proven & Probable 1,357,100 t Silver 94 g/t
Proven & Probable 1,357,100 t Copper 0.26 %
Proven & Probable 1,357,100 t Zinc 2.99 %
Proven & Probable 1,357,100 t Lead 0.97 %
Measured & Indicated 1,499 kt Gold 1.27 g/t
Measured & Indicated 1,499 kt Silver 126.26 g/t
Measured & Indicated 1,499 kt Copper 0.31 %
Measured & Indicated 1,499 kt Zinc 3.79 %
Measured & Indicated 1,499 kt Lead 1.29 %
Inferred 1,916 kt Gold 0.8 g/t
Inferred 1,916 kt Silver 110.98 g/t
Inferred 1,916 kt Copper 0.25 %
Inferred 1,916 kt Zinc 3.19 %
Inferred 1,916 kt Lead 1.18 %
Inferred 1,916 kt Gold Equivalent

Commodity Production Costs:

CommodityUnits2016
Credits (by-product) Gold Equivalent USD -777 / oz  
Total cash costs (sold) Gold Equivalent USD 1,325 / oz  
Total cash costs (sold) Gold Equivalent USD 548 / oz†  
All-in sustaining costs (sold) Gold Equivalent USD 970 / oz†  
All-in costs Gold Equivalent USD 1,137 / oz†  
† Net of By-Product.

Operating Costs:

Units2015
Total operating costs ($/t milled) USD 76  

Financials:

Units2016
Capital expenditures M USD 15.1  
Revenue M USD 83.2  
Gross profit M USD 22.4  
After-tax Income M USD 4.4  


Water Supply
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Heavy Mobile Equipment:

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 Jul 6, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 6, 2023
....................... Subscription required ....................... Subscription required Subscription required Jul 5, 2023
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Form 10-K 2022
Technical Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Annual Report 2018
Form 10-K 2017
Corporate Presentation 2016
Form 10-K 2016
Annual Report 2015
Annual Report 2014
Subscription required - Subscription is required.

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