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Indonesia
Grasberg Mine (Grasberg Complex)

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 Location:
60 km NE from Timika, Indonesia

  Address:
Plaza 89, Lt. 5 Jl. HR. Rasuna Said Kav. X-7 No. 6
Jakarta
Indonesia
12940
Phone  ...  Subscription required
Fax+62-21-2591945
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Fleet
  • Filings & News

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Overview

StatusClosing / Closed
Mine TypeOpen Pit
Commodities
  • Copper
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2019
PT-FI began open-pit mining of the Grasberg ore body in 1990. The final phase of the Grasberg open pit was mined during 2019, including the removal of the open pit ramps. In aggregate, the Grasberg open pit produced over 27 billion pounds of copper and 46 million ounces of gold in the 30-year period from 1990 through 2019.


Owners

Source: p. 4
CompanyInterestOwnership
Freeport-McMoRan Inc. 48.76 % Indirect
PT Indonesia Asahan Aluminium (Persero) 51.24 % Indirect
PT-FI is a limited liability company organized under the laws of the Republic of Indonesia. Freeport-McMoRan have a 48.76 percent share ownership in PT-FI and the remaining 51.24 percent share ownership is held by PT Indonesia Asahan Aluminium (an Indonesian state-owned enterprise).

Contractors

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Deposit Type

  • Vein / narrow vein
  • Breccia pipe / Stockwork


Summary:

The igneous-hosted ore bodies (the Grasberg open pit and block cave, and portions of the DOZ block cave) occur as vein stockworks and disseminations of copper sulfides, dominated by chalcopyrite and, to a lesser extent, bornite.


Mining Methods

  • Truck & Shovel / Loader


Summary:

PT-FI began open-pit mining of the Grasberg ore body in 1990. The final phase of the Grasberg open pit was mined during 2019, including the removal of the open pit ramps. In aggregate, the Grasberg open pit produced over 27 billion pounds of copper and 46 million ounces of gold in the 30-year period from 1990 through 2019.


Crushing and Grinding


Processing

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Summary:

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Combined production numbers are reported under Grasberg Complex

Operational Metrics:

Metrics202020192018201720162015
Daily milling rate  ......  Subscription required60,100 t133,300 t101,800 t119,700 t115,900 t
Ore tonnes mined  ......  Subscription required49 Mt37 Mt44 Mt42 Mt
Daily mining capacity  ......  Subscription required275,000 t
Daily mining rate  ......  Subscription required180,500 t250,400 t
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Reserves at December 31, 2018:

CategoryOreTypeTonnage CommodityGradeRecoverable Metal
Proven Sulphide 1 Mt Copper 2.65 %
Proven Sulphide 1 Mt Gold 5.7 g/t
Proven Sulphide 1 Mt Silver 7.97 g/t
Probable Sulphide 4 Mt Copper 1.08 %
Probable Sulphide 4 Mt Gold 1.51 g/t
Probable Sulphide 4 Mt Silver 3.12 g/t
Proven & Probable Sulphide 5 Mt Copper 1.26 % 0.1 B lbs
Proven & Probable Sulphide 5 Mt Gold 1.98 g/t 0.3 M oz
Proven & Probable Sulphide 5 Mt Silver 3.66 g/t 0.3 M oz



Heavy Mobile Equipment as of December 31, 2018:
HME TypeSizeQuantity
Shovel 17 cu. m ....................... Subscription required
Truck (haul) 200 t ....................... Subscription required
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2019
Form 10-K 2018
Form 10-K 2017
Form 10-K 2016
Form 10-K 2015
Form 10-K 2014
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