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Argentina
Pirquitas Mine

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 Location:
207 km NW from San Salvador de Jujuy, Argentina

  Address:
San Martin 116 - Piso #1
San Salvador de Jujuy
Argentina
4600
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  • Overview
  • Owners
  • Geology
  • Mining
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  • Filings & News

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Overview

StatusClosing / Closed
Mine TypeOpen Pit
Commodities
  • Silver
  • Zinc
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life7 years (as of Jan 1, 2011)
The Pirquitas property achieved commercial production in 2009, with mining of the San Miguel open pit ceasing in January 2017. In 2017, Puna Operations processed Pirquitas stockpiles in the Pirquitas processing facilities.


Owners

 
CompanyInterestOwnership
SSR Mining Inc. 100 % Indirect

Contractors

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Deposit Type

  • Epithermal
  • Vein / narrow vein
  • Breccia pipe / Stockwork


Summary:

The Pirquitas deposit is an example of the Ag Sn sub-group of the epithermal class of mineral deposits (Panteleyev, 1996). Also known as Bolivian-type polymetallic deposits, examples of this deposit type are numerous in the Bolivian Silver -Tin Belt that extends between the San Rafael Sn(-Cu) deposit in southern Peru and the Pirquitas deposit in northwestern Argentina.

Bolivian-type Ag-Sn deposits generally consist of sulphide and quartz-sulphide vein systems typically containing cassiterite and a diverse suite of base and trace metals, including Ag in a complex assemblage of sulphide and sulfosalt minerals. The vein systems are generally spatially and likely genetically associated with epizonal (subvolcanic) quartz-bearing peraluminous intrusions one to two kilometres in diameter, although the mineralization may be entirely hosted by the country rocks into which the intrusive stocks were emplaced.

The suite of principal and subordinate ore minerals that characterize this deposit type includes, but is not limited to, pyrite, cassiterite, pyrrhotite, marcasite;,sphalerite, galena, chalcopyrite, stannite, arsenopyrite, tetrahedrite, scheelite, wolframite, andorite, jamesonite, boulangerite, ruby silver (pyrargyrite), stibnite, bismuthinite, native bismuth, molybdenite, argentite, gold and a variety of complex sulfosalt minerals. Metal zoning from depth to surface and from centers outward shows: Sn + W, Cu + Zn, Pb + Zn, Pb + Ag, and Ag ± Au; commonly there ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining of the San Miguel open pit ceased in January 2017. Previously, the Pirquitas mine used a standard open pit mining method and conventional drilling and blasting activities with a pre-split to ensure stable wall rock conditions. RC grade control drilling was used in the pit to define the structurally controlled vein and breccia hosted ore zones. The depth and relatively lower grade of the ore body made the Mineral Reserves and Mineral Resources at the Pirquitas mine amenable for open pit mining.


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityUnits2017201620152014
Silver koz 6,17710,42210,3398,733
Zinc k lbs  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate.

Operational Metrics:

Metrics2017201620152014
Tonnes milled 1,798 kt1,774 kt1,557 kt1,587 kt
Total tonnes mined 9,142 kt11,900 kt16,391 kt
Ore tonnes mined 2,825 kt
Waste 6,317 kt9,090 kt14,389 kt
Daily milling rate 4,846 t
Stripping / waste ratio 2.2 3.2 7.2
Daily milling capacity 5,000 t5,000 t
Daily mining rate 36,000 t

Reserves at December 31, 2021:
Piriquitas UG Mineral Resources are reported using a silver metal price of $20.00/oz, $1.10/lb lead, and $1.30/lb zinc. The cut-off grade includes lead and zinc attributable metal and is calculated at $100/t.

CategoryOreTypeTonnage CommodityGradeContained Metal
Measured In-Situ (UG) 79 kt Silver 444.5 g/t 1,129 koz
Measured In-Situ (UG) 79 kt Zinc 1.17 % 2 M lbs
Measured In-Situ (UG) 79 kt Lead 0.2 % 0.3 M lbs
Indicated In-Situ (UG) 2,555 kt Silver 287.67 g/t 23,627 koz
Indicated In-Situ (UG) 2,555 kt Zinc 4.56 % 256.8 M lbs
Indicated In-Situ (UG) 2,555 kt Lead 0.02 % 1.1 M lbs
Measured & Indicated In-Situ (UG) 2,634 kt Silver 292.33 g/t 24,756 koz
Measured & Indicated In-Situ (UG) 2,634 kt Zinc 4.46 % 258.9 M lbs
Measured & Indicated In-Situ (UG) 2,634 kt Lead 0.03 % 1.4 M lbs
Inferred In-Situ (UG) 1,080 kt Silver 206.86 g/t 7,185 koz
Inferred In-Situ (UG) 1,080 kt Zinc 7.45 % 177.4 M lbs
Inferred In-Situ (UG) 1,080 kt Lead 0.1 M lbs

Commodity Production Costs:

CommodityUnits20172016
Cash costs (sold) Silver USD 13.1 / oz†   9 / oz†  
All-in sustaining costs (sold) Silver USD 14.3 / oz†   10.2 / oz†  
† Net of By-Product.

Operating Costs:

Units20162015
OP mining costs ($/t mined) USD 3.693.47
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Financials:

Units20172016
Sustaining costs M USD 4.6   10.3  
Revenue M USD 89.6   169.3  
Operating Income M USD 65.8  



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 16, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2017
Corporate Presentation 2017
Corporate Presentation 2017
Management Discussion & Analysis 2017
Press Release 2017
Annual Information Form 2016
Corporate Presentation 2016
Financial Review 2016
Annual Information Form 2015
Financial Review 2015
Management Discussion & Analysis 2015
Technical Report 2011
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