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Argentina
Cerro Moro Mine

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 Location:
73 km E from Tres Cerros, Argentina

  Address:
Estrada 1154/1160 - Puerto Deseado
Santa Cruz
Argentina
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
  • Bench & Fill
  • Longhole stoping
  • Cemented backfill
Production Start...
Mine Life5 years (as of Jan 1, 2021)
The Company will advance the phase 1 and phase 2 expansion options to a pre-feasibility study level, expected for completion in early 2023.


Owners

Source: p. 80
CompanyInterestOwnership
Yamana Gold Inc. 100 % Indirect
Ownership Tree
Cerro Moro is comprised of ten grouped mining concessions consisting of a combination of 70 mining minas and 12 exploration cateos, totalling 304,167 hectares. Estelar Resources S.A. (“Estelar”), an indirect subsidiary of Yamana, holds valid and marketable title to the Cerro Moro group of concessions.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Epithermal


Summary:

Cerro Moro is located within the Deseado Massif, a tectonic block in the central portion of the Santa Cruz Province that covers an area of approximately 60,000 square kilometres. The Deseado Massif is host to several producing and past-producing gold and silver mines, all of the low-sulphidation gold-silver quartz vein deposit type. This deposit type is characterized by quartz veins, stockworks, and breccias that contain gold, silver, electrum, argentite, and pyrite with lesser and variable amounts of sphalerite, chalcopyrite, galena, rare tetrahedrite and sulphosalt minerals that form in high-level (epizonal) to near-surface environments.

The Cerro Moro property is underlain by Tertiary marine sediments, Quaternary gravels and volcanic rocks of Jurassic age assigned to the Bahía Laura Group by Panza et al. (1994).

The current distribution of rock units is strongly controlled by faulting. Stratified rocks generally dip gently to the south but are displaced along numerous faults. Actual displacement vectors on faults are poorly defined and structural observations of veins and fault surfaces show a complex history, with reactivation of fault surfaces showing different displacement vectors during different periods of deformation and resultant mineralization.

Gold-silver mineralization at Cerro Moro is associated with epithermal veins. Geological mapping and ArAr age dating on vein adularia have defined at least three episodes of veining, spread o ........


Mining Methods

  • Truck & Shovel / Loader
  • Bench & Fill
  • Longhole stoping
  • Cemented backfill


Summary:

Cerro Moro consists of several open pit and underground mines which feed a single processing plant with a throughput capacity of approximately 1,000 tpd.

Production from mines located close to the Run of mine (ROM) pad is hauled directly from the mine. For mines located at greater distances, ore is hauled to a stockpile located close to the portal or pit and then hauled to the ROM pad in hauling campaigns.

Open pit operations are currently carried out by a contractor. The average production rate is of approximately 600 tpd of ore and 16,000 tpd waste. However, production from the open pits will gradually reduce as Cerro Moro transitions to increased production from the underground mines. There are typically two to four pits in operation at any one time. The open pit mining sequence consists of first pre-splitting both sides of the vein with holes spaced every 1 meter apart. Then, from the ramp access, waste polygons on the hangingwall side of the vein are mined to create a free face for the vein. Once the vein is fully exposed, the vein is blasted and mined separately to minimize dilution. Once the vein is completely extracted, the remaining waste polygons on the footwall are extracted.

Underground mining at Cerro Moro is carried out using longitidinal long-hole stoping methods. Two variations of long-hole stoping will be employed; bench-and-fill (at Escondida, Martina, and Zoe), and uphole retreat (at Gabriela). Both methods involve ore devel ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityUnits20222021202020192018
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required93
Silver koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Equivalent koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics2021202020192018
Ore tonnes mined  ......  Subscription required  ......  Subscription required352,332 t210,644 t
Waste  ......  Subscription required  ......  Subscription required6,640,990 t6,416,534 t
Tonnes processed  ......  Subscription required  ......  Subscription required367,334 t199,602 t
Daily processing capacity  ......  Subscription required  ......  Subscription required1,000 t1,000 t
Daily processing rate  ......  Subscription required  ......  Subscription required
Annual processing capacity  ......  Subscription required  ......  Subscription required365,000 t
Subscription required - Subscription is required.

Reserves at December 31, 2021:
Mineral Reserves: Underground NSR cut-off at $210.71/t and open pit NSR cut-off at $124.72/t.
Mineral Resources: Underground NSR cut-off at $158.04/t and open pit NSR cut-off at $93.54/t. Heap leach resource reported at NSR cut-off value of $90.5/t (underground) and $26.0/t (open pit).

CategoryTonnage CommodityGradeContained Metal
Proven 365 kt Gold 9.27 g/t 109 koz
Proven 365 kt Silver 593.5 g/t 6,964 koz
Probable 1,384 kt Gold 7.82 g/t 348 koz
Probable 1,384 kt Silver 342 g/t 15,215 koz
Proven & Probable 1,749 kt Gold 8.12 g/t 457 koz
Proven & Probable 1,749 kt Silver 394.5 g/t 22,180 koz
Measured 177 kt Gold 5.26 g/t 30 koz
Measured 177 kt Silver 234 g/t 1,328 koz
Indicated 760 kt Gold 3.58 g/t 87 koz
Indicated 760 kt Silver 266.1 g/t 6,506 koz
Measured & Indicated 937 kt Gold 3.89 g/t 117 koz
Measured & Indicated 937 kt Silver 260 g/t 7,834 koz
Inferred 1,488 kt Gold 4.73 g/t 226 koz
Inferred 1,488 kt Silver 170.6 g/t 8,159 koz

Commodity Production Costs:

CommodityUnits20222021202020192018
Cash costs (sold) Gold Equivalent USD  ......  Subscription required&nbs  ......  Subscription required  ......  Subscription required  ......  Subscription required 629 / oz  
Cash costs Silver USD 5.98 / oz  
Cash costs Gold USD 479 / oz  
All-in sustaining costs (sold) Gold Equivalent USD  ......  Subscription required&nbs  ......  Subscription required  ......  Subscription required  ......  Subscription required 848 / oz  
All-in sustaining costs (AISC) Silver USD 7.49 / oz  
All-in sustaining costs (AISC) Gold USD 600 / oz  
^ Guidance / Forecast.
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Financials:

Units20222021202020192018
Capital expenditures (planned) M USD  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 15  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 87.6  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 126.8  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 11.6  
Subscription required - Subscription is required



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 30, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 30, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 30, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 30, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... 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 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Annual Report 2018
Corporate Presentation 2018
Press Release 2018
Management Discussion & Analysis 2017
Annual Report 2015
Preliminary Economic Assessment 2012
Technical Report 2007
Subscription required - Subscription is required.

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