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Chile
Pascua-Lama Project

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 Location:
129 km E from La Serena, Chile

  Project Contacts:
Av. Ricardo Lyon 222 Piso 8 Providencia
Santiago
Chile
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Personnel
  • Filings & News

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Overview

StatusClosing / Closed
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
  • Copper
Mining Method
  • Truck & Shovel / Loader
Processing
  • Smelting
  • Flotation
  • Counter current decantation (CCD)
  • Agitated tank (VAT) leaching
  • Merrill–Crowe
  • Cyanide (reagent)
Mine Life25 years (as of Jan 1, 2014)
Sept. 18, 2020 (GLOBE NEWSWIRE) -- Barrick Gold Corporation (NYSE:GOLD) (TSX:ABX) said today it accepted the Antofagasta Environmental Court’s decision to uphold the closure order and sanctions Chile’s environmental regulator imposed on Compañía Minera Nevada, the Barrick subsidiary that holds the Chilean portion (Pascua) of the Pascua-Lama project.

Barrick said the ruling drew a line under a legal process that started in 2013 and the company would not appeal it. Construction was suspended that year and Pascua would now be transitioned from care and maintenance to closure in accordance with the Environmental Court’s decision.
Latest NewsBarrick accepts Environmental Court ruling, continues to seek new opportunities in Chile     September 18, 2020


Owners

Source: p. 6
CompanyInterestOwnership
Barrick Gold Corp. 100 % Indirect
Barrick Latam 100 % Indirect
Compañia Minera Nevada SPA. 100 % Direct
Barrick Gold Corp owns 100% of Pascua-Lama.

Deposit Type

  • Epithermal


Summary:

The Pascua-Lama property is located in the high Andean Mountains, in what has been designated as the Eastern Belt of Hydrothermal Alteration. The gold, silver, and copper mineralization and alteration assemblages at Pascua-Lama are associated with a structurally controlled acid sulfate hydrothermal system hosted by intrusive and volcanic rock sequences of Upper Paleozoic and Middle Tertiary age.

Alteration and mineralization is of the high-sulfidation, epithermal type. As is typical with high-sulfidation epithermal deposits, the principal metal commodities at Pascua-Lama are gold and silver – the copper content is usually sub-economic.

Numerous breccias bodies occur in the Esperanza, Quebrada de Pascua and Lama areas. At the surface, these breccias vary in size from outcrops measured in centimeters up to hundreds of meters. Typically the breccias show a strong correlation to zones of intersection of two or more major structural zones. Breccia Central, the large inter mineral breccia pipe, occurs in the Quebrada de Pascua area. On the surface, this breccia body is about 650 meters long and up to 250 meters in width, while underground, between 200 and 400 meters below the surface, the composite body measures about 550 meters in length and up to 130 meters in width. It extends to at least 700 meters below surface. This well mineralized breccia pipe is evidence of an explosive hydrothermal event related to the formation of the Quebrada de Pascua ore deposit. Breccia Oeste and Breccia Sur are the two large post mineralization breccias pipe complexes located in the mine area. Oriented north/south along the Breccia Oeste fault zone in the Esperanza area, the Breccia Oeste pipe measures up to 500 meters long, up to 150 meters wide, and extends up to 300 meters below surface.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Pascua-Lama project is designed as a large-scale open pit operation centered at an elevation of 4,800 meters with processing facilities having an initial designed throughput capacity of 45,000 tonnes per day.


Crushing and Grinding


Processing

  • Smelting
  • Flotation
  • Counter current decantation (CCD)
  • Agitated tank (VAT) leaching
  • Merrill–Crowe
  • Cyanide (reagent)

Source: Subscription required

Summary:

The planned plant would consist of primary crushing, wet grinding in autogenous mills, ball milling, CCD washing, pre-aeration, oxygen assisted cyanide leaching, CCD thickening for pregnant solution recovery, neutralization, cyanide detoxification, precipitation using Merrill-Crowe, retorting, smelting and tailings deposition. For the treatment of the refractory ore, a flotation circuit will be added. The processing plant is designed to operate 24 hours a day, 365 days per year. The average design throughput would be approximately 2,000 tonnes per hour. Based on existing reserves and the designed production capacity, the expected mine life would be approximately 25 years.


Projected Production:

CommodityUnitsAvg. Annual
Gold oz 800,000

Operational Metrics:

Metrics
Daily milling capacity 45,000 t *
* According to 2014 study.

Reserves at December 31, 2019:

CategoryTonnage CommodityGradeContained Metal
Measured 43 Mt Gold 1.86 g/t 2.6 M oz
Measured 43 Mt Silver 57.21 g/t 79 M oz
Indicated 390 Mt Gold 1.49 g/t 19 M oz
Indicated 390 Mt Silver 52.22 g/t 660 M oz
Inferred 15 Mt Gold 1.7 g/t 0.86 M oz
Inferred 15 Mt Silver 17.8 g/t 8.8 M oz

Financials:

Units2018201720162015
Capital expenditures M USD 39   6   20   188  


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Aug 21, 2020
....................... Subscription required ....................... Subscription required Subscription required Aug 21, 2020
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
Quarterly Report 2018
Quarterly Report 2017
Management Discussion & Analysis 2016
Press Release 2016
Press Release 2016
Annual Information Form 2015
Annual Information Form 2015
Fact Sheet 2015
Annual Report 2014
Technical Report 2011
Annual Report 59
Subscription required - Subscription is required.

News:

NewsDate
Barrick accepts Environmental Court ruling, continues to seek new opportunities in Chile September 18, 2020

Aerial view:

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