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Argentina
Don Nicolas Mine

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 Location:
103 km S from Pico Truncado, Argentina

  Address:
Ruta 3, km. 2085,5 – Paraje Tres Cerros, Sta. Cruz
Tres Cerros
Argentina
CP9050
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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
Production Start...
Mine Life7 years (as of Jan 1, 2020)
The Dual Stream Production Strategy will focus on processing high-grade material through the existing CIL plant and the development of heap leach facilities for processing of lower grade material that is currently treated as waste or stockpiled for future use.

The Company plans to develop two heap leach operations. The first will focus on the Las Calandrias and Escondido deposits at the northern perimeter of the property. A second heap leach operation is to be developed in the Martinetas mining region to process lower grade material. Cerrado believes this could be in operation by late 2023 adding a further potential of 15,000 - 20,000 ounces of gold per annum.
Latest NewsCerrado Gold Announces Q4 Gold Production Results and Provides 2023 Guidance for Its Minera Don Nicolas Mine in Argentina     January 18, 2023


Owners

Source: p. 3,26
CompanyInterestOwnership
Cerrado Gold Inc. 100 % Indirect
Minera Don Nicolas S.A. (operator) 100 % Direct
Cerrado acquired 100% of Minera Don Nicolás gold mine ("MDN”) on March 16, 2020 from Minera Don Nicolás S.A via Compañia Inversora En Minas S.A. (“CIMINAS”) and Compañia Inversora Argentina Para La Exportacion S.A. (“CIAPEXSA”).

With the completion of the transaction, MDN has become a wholly owned subsidiary of Cerrado, and the Company is now the owner and operator of MDN, an open-pit gold mine in the province of Santa Cruz, Argentina.

Contractors

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Deposit Type

  • Epithermal
  • Vein / narrow vein
  • Sedimentary - Volcanogenic
  • Volcanic hosted


Summary:

The gold-silver deposits of the Deseado Massif are hosted in silicic volcanic and volcano-sedimentary Jurassic rocks related to arc or back-arc settings in Andean or extra-Andean settings. The ore geology, textures, mineralogy, restricted alteration, and geochemistry of these mineralised occurrences indicate that they belong to the epithermal class of precious metal deposits. The deposits are mainly associated with quartz +/- calcite +/- adularia +/- illite alteration assemblages interpreted to represent low and intermediate sulphidation epithermal type deposits.

At La Paloma, the Sulfuro-Rocio vein system comprises narrow, arcuate, steeply dipping quartz- breccia veins. Drilling has defined four areas of interest:

• The Sulfuro vein, the principal deposit of economic interest, is represented by a single, well developed quartz vein typically 2 m to 4 m in thickness and has a primarily northwest-south southeast orientation with a steep southwestwardly dip. Associated sulphide minerals include pyrite and minor galena and sphalerite.
• The Ramal Sulfuro vein occurs at the northern end of the main Sulfuro vein and is strongly curved from a north-south orientation to east-west and is typically 2 m to 4 m in thickness.
• The Rocio vein occurs to the west of the main Sulfuro vein. The Rocio vein is typically 2 m to 5 m in thickness and dips steeply to the east. It is also arcuate in shape and sub-parallels the Sulfuro vein.
• The Esperanza ve ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The MDN operation is currently a producing gold mine. Final construction was completed December 2017 for the 1,000 tpd operation.The mine was “designed” for 1,000 tpd and it has reached 1,200 tpd on occasion.

Commissioning of the operation began in December 2017. MDN began operations of a series of conventional open pit mines with a carbon-in-leach facility. Ramp up continued until late 2019. Currently the operation is mining from three active pits (Coyote, Cerro Oro and Sulfuro) at a rate of +1,000 tpd and the mill is able to handle the throughput. As of the effective date of the technical report, further optimisation is being done to both the mining and milling operation. MDN consists of two fully permitted mining areas, each containing a clustered, shallow pits.

Production began with removal of waste for the construction of the tailings storage facility. Marginal grade was stockpiled at the same time and now a long-term, low-grade stockpile has grown to over 500 kt. It continues to grow as all marginal material is stored here.

Mining is currently split 70% – 30% between the Martinetas pits and the La Paloma pits 60 km away, largely due to the high stripping ratio at La Paloma. The three Pantera drills typically drill out blast patterns on a double bench height of 10 m and a 5 m bench when mining mineralised material. Blast holes are typically 3.5” to 4” in diameter. Waste drilling and pre splitting against the final pit wall is done using 5 ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:
Full year 2020 results only include operations of MDN for the period from acquisition, March 16, 2020 to December 31, 2020.

CommodityUnits20222021202020192018
Gold oz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required24,882
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
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Operational Metrics:

Metrics2021202020192018
Total tonnes mined  ......  Subscription required  ......  Subscription required
Ore tonnes mined  ......  Subscription required  ......  Subscription required242,232 t156,651 t
Waste  ......  Subscription required  ......  Subscription required5,387,105 t3,470,372 t
Tonnes milled  ......  Subscription required  ......  Subscription required277,029 t286,457 t
Daily milling rate  ......  Subscription required  ......  Subscription required
Stripping / waste ratio  ......  Subscription required  ......  Subscription required22.2 22.2
Daily mining rate  ......  Subscription required  ......  Subscription required
Daily milling capacity  ......  Subscription required  ......  Subscription required
Daily ore mining rate  ......  Subscription required  ......  Subscription required
Plant annual capacity  ......  Subscription required  ......  Subscription required
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Reserves at August 31, 2020:
Open pit mineral resources are reported at a cut-off grade of 0.3 g/t gold for the open pit portion and 3.0 g/t gold for the underground deposits. Cut-off grades are based on a price of US$1,550 per ounce of gold and gold recoveries of 95 percent at Martinetas and 88 percent at La Paloma, without considering revenues from other metals.

CategoryOreTypeTonnage CommodityGradeContained Metal
Measured In-Situ (OP) 249,400 t Gold 4.32 g/t 34,668 oz
Measured In-Situ (OP) 249,400 t Silver 5.5 g/t 44,100 oz
Indicated In-Situ (OP) 820,600 t Gold 5.77 g/t 152,237 oz
Indicated In-Situ (UG) 56,200 t Gold 6.59 g/t 11,903 oz
Indicated Total 876,800 t Gold 5.82 g/t 164,140 oz
Indicated In-Situ (OP) 820,600 t Silver 9.61 g/t 183,126 oz
Indicated In-Situ (UG) 56,200 t Silver 8.12 g/t 14,677 oz
Indicated Total 876,800 t Silver 9.48 g/t 197,803 oz
Measured & Indicated In-Situ (OP) 1,070,000 t Gold 5.43 g/t 186,905 oz
Measured & Indicated In-Situ (UG) 56,200 t Gold 6.59 g/t 11,903 oz
Measured & Indicated Total 1,126,200 t Gold 5.49 g/t 198,808 oz
Measured & Indicated In-Situ (OP) 1,070,000 t Silver 8.39 g/t 227,226 oz
Measured & Indicated In-Situ (UG) 56,200 t Silver 8.12 g/t 14,677 oz
Measured & Indicated Total 1,126,200 t Silver 8.37 g/t 241,903 oz
Inferred In-Situ (OP) 4,108,400 t Gold 1.59 g/t 210,476 oz
Inferred In-Situ (UG) 555,300 t Gold 7.74 g/t 138,217 oz
Inferred Total 4,663,700 t Gold 2.33 g/t 348,693 oz
Inferred In-Situ (OP) 4,108,400 t Silver 3.75 g/t 195,252 oz
Inferred In-Situ (UG) 555,300 t Silver 8.41 g/t 124,867 oz
Inferred Total 4,663,700 t Silver 4.78 g/t 320,118 oz

Commodity Production Costs:

CommodityUnits20212020
Total cash costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†
All-in sustaining costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†
† Net of By-Product.
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Financials:

Units2021202020192018
Revenue M USD  ......  Subscription required  ......  Subscription required
Operating Income M USD  ......  Subscription required  ......  Subscription required
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -1.6  
Subscription required - Subscription is required



Heavy Mobile Equipment as of August 31, 2020:
HME TypeModelSizeQuantityLeased or
Contractor
Dozer ....................... Subscription required ....................... Subscription required
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required
Drill (blasthole) ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Loader (FEL) ....................... Subscription required ....................... Subscription required
Truck (dump) ....................... Subscription required 60 t ....................... Subscription required
Truck (dump) ....................... Subscription required 40 t ....................... Subscription required
Truck (haul) 28 t ....................... Subscription required Leased
Truck (water) ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 31, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 28, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 28, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Apr 28, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 31, 2020
....................... Subscription required ....................... Subscription required Subscription required Apr 28, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
Feasibility Study Report 2012
Subscription required - Subscription is required.

News:

NewsDate
Cerrado Gold Announces Q4 Gold Production Results and Provides 2023 Guidance for Its Minera Don Nicolas Mine in Argentina January 18, 2023

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