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Indonesia
Grasberg Complex (Big Gossan Mine, Deep Mill Level Zone (DMLZ) Mine, Deep Ore Zone (DOZ) Mine, Grasberg Mine, Grasberg Block Cave Mine)

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 Location:
60 km NE from Timika, Indonesia

  Regional Office:
Plaza 89, Lt. 5 Jl. HR. Rasuna Said Kav. X-7 No. 6
Jakarta
Indonesia
12940
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Fax+62-21-2591945
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Copper
  • Gold
  • Silver
Mining Method
  • Block caving
  • Blast Hole Stoping
  • Paste backfill
Mine Life2041
PT-FI’s assets include one of the world’s largest copper and gold deposits at the Grasberg minerals district in Papua, Indonesia. The Grasberg minerals district includes the following underground mines that are being operated: the Grasberg Block Cave, the Deep Mill Level Zone (DMLZ) and Big Gossan. During 2021, PT-FI began development of the Kucing Liar underground ore body and the Deep Ore Zone (DOZ) underground mine ceased production. The ramp-up of underground production at the Grasberg minerals district in Indonesia continues to advance on schedule. During 2021, a total of 139 new drawbells were added at the Grasberg Block Cave and DMLZ underground mines, bringing cumulative open drawbells to 510.
Latest NewsFreeport-McMoRan Provides Update On PT Freeport Indonesia Operations     February 12, 2023


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

  • Breccia pipe / Stockwork
  • Skarn
  • Vein / narrow vein
  • Porphyry


Summary:

The Grasberg minerals district is a copper, gold, and silver porphyry skarn deposit located in the remote highlands of the Sudirman Mountain Range in the eastern province of Papua, Indonesia, on the western half of the island of New Guinea. The district includes the following operating underground mines: Grasberg Block Cave (GBC), Deep Mill Level Zone (DMLZ), and Big Gossan (BG). The Grasberg minerals district also includes Kucing Liar (KL), which began development in 2021. The Deep Ore Zone (DOZ) ceased production at the end of 2021 and Grasberg open-pit (GRS_OP) in 2019.

The ore bodies are located within and around two main igneous intrusions: the Grasberg monzodiorite and the Ertsberg diorite. The host rocks of these ore bodies include both carbonate and clastic rocks that form the ridge crests and upper flanks of the Sudirman Range and the igneous rocks of monzonitic to dioritic composition that intrude them. The igneous-hosted ore bodies (GBC, and portions of the DMLZ) occur as vein stockworks and disseminations of copper sulfides, dominated by chalcopyrite and to a lesser extent bornite. The sedimentary-rock hosted ore bodies (portions of the DMLZ, KL and all of the BG) occur as magnetite-rich, calcium/magnesian skarn replacements, whose location and orientation are strongly influenced by major faults and by the chemistry of the carbonate rocks along the margins of the intrusions.

The Grasberg minerals district is situated on the crest of the Jaya ........


Mining Methods

  • Block caving
  • Blast Hole Stoping
  • Paste backfill


Summary:

All of the currently active operations are underground mines. The mining method for each reserve is as follows:
- GBC: block/panel cave mine.
- DMLZ: block/panel cave mine.
- BG: open stope mine.
- KL: block/panel cave mine.

Mine unit operations include drilling, blasting to develop access, undercuts, drawbell development, ore raise development, drawpoint development, cave initiation, as well as loading and hauling. Support equipment is used for maintaining underground access roads, underground crushers, conveyors, and other mine services.

Required underground mining equipment varies by individual operation and includes that equipment required to develop and construct the mines as well as production support. The primary mining fleet consists of load-haul-dump loaders with 11 metric ton capacity and haul trucks with 55 to 60 metric ton capacity.

The site infrastructure at PT-FI has been established over the history of the project and supports the current operations. The current major mine infrastructure includes: waste rock storage facilities, temporary stockpiles, riverine tailings management system, power and electrical systems, water usage systems, various on-site warehouses and maintenance shops, and offices required for administration, engineering, maintenance and other related mine and processing operations.

Grasberg Block Cave Underground Mine
The Grasberg Block Cave ore body is the same ore body his ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityProductUnits2022202120202019201820172016
Copper Metal in concentrate M lbs  ......  Subscription required ^
Gold Metal in concentrate koz  ......  Subscription required ^
Copper Metal in copper conc. M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required1,2279961,063
Gold Metal in copper conc. koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
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Operational Metrics:

Metrics202220212020201920182017
Daily milling rate  ......  Subscription required  ......  Subscription required  ......  Subscription required110,100 t178,100 t140,400 t
^ Guidance / Forecast.
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Reserves at December 31, 2021:
Cut-off grades vary depending on ore deposit.

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven Sulphide 512 Mt Copper 1.13 % 10,763 M lbs
Proven Sulphide 512 Mt Gold 0.81 g/t 8,540 koz
Proven Sulphide 512 Mt Silver 4.45 g/t 39,921 koz
Probable Sulphide 1,159 Mt Copper 1 % 21,451 M lbs
Probable Sulphide 1,159 Mt Gold 0.75 g/t 18,051 koz
Probable Sulphide 1,159 Mt Silver 4.43 g/t 89,543 koz
Proven & Probable Sulphide 1,671 Mt Copper 1.04 % 32,214 M lbs
Proven & Probable Sulphide 1,671 Mt Gold 0.77 g/t 26,590 koz
Proven & Probable Sulphide 1,671 Mt Silver 4.44 g/t 129,464 koz
Measured Sulphide 319 Mt Copper 0.78 % 5,501 M lbs
Measured Sulphide 319 Mt Gold 0.6 g/t 6,166 koz
Measured Sulphide 319 Mt Silver 4.39 g/t 45,033 koz
Indicated Sulphide 2,136 Mt Copper 0.76 % 35,678 M lbs
Indicated Sulphide 2,136 Mt Gold 0.64 g/t 43,710 koz
Indicated Sulphide 2,136 Mt Silver 4.15 g/t 285,110 koz
Measured & Indicated Sulphide 2,454 Mt Copper 0.49 % 1,668 M lbs
Measured & Indicated Sulphide 2,454 Mt Gold 0.4 g/t 1,972 koz
Measured & Indicated Sulphide 2,454 Mt Silver 2.77 g/t 13,738 koz
Inferred Sulphide 154 Mt Copper 0.49 % 1,668 M lbs
Inferred Sulphide 154 Mt Gold 0.4 g/t 1,972 koz
Inferred Sulphide 154 Mt Silver 2.77 g/t 13,738 koz
Total Resource Sulphide 2,608 Mt Copper 0.75 % 42,846 M lbs
Total Resource Sulphide 2,608 Mt Gold 0.62 g/t 51,849 koz
Total Resource Sulphide 2,608 Mt Silver 4.1 g/t 343,881 koz

Commodity Production Costs:

CommodityUnits202120202019201820172016
Credits (by-product) Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -2.69 / lb   -2.05 / lb   -1.3 / lb  
Total cash costs Copper USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 1.1 / lb   1.27 / lb   1.36 / lb  
Total cash costs Gold USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 478 / oz   542 / oz   734 / oz  
Total cash costs Copper USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† -0.58 / lb†   0.09 / lb†   0.83 / lb†  
† Net of By-Product.
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Financials:

Units202120202019201820172016
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 1,001   875   1,025  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 6,288   4,946   3,802  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 2,966   2,020   1,027  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 3,089   2,146   1,117  
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Pipelines
Source: Subscription required


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 21, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016
Subscription required 2015
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Form 10-K 2018
Press Release 2018
Form 10-K 2017
Form 10-K 2016
Form 10-K 2015
Form 10-K 2014
Form 10-K 2013
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News:

NewsDate
Freeport-McMoRan Provides Update On PT Freeport Indonesia Operations February 12, 2023

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