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Grasberg Mine, Gunung Bijih District (Grasberg District), Carstensz Mts, New Guinea, Papua Province, Western New Guinea (Irian Jaya), Indonesia

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Latitude & Longitude (WGS84): 4° 3' 21'' South , 137° 6' 47'' East
Latitude & Longitude (decimal): -4.05602,137.11320
GeoHash:G#: rp38bjdgc
Owned/operated by:Freeport-McMoRan, Rio Tinto Group
Locality type:Mine
Age:3.41 ± 0.03 to 2.59 ± 0.15 Ma
Geologic Time:Pliocene
Dating method:Ar-Ar
Reference for age:Pollard, P. J., Taylor, R. G., & Peters, L. (2005). Ages of intrusion, alteration, and mineralization at the Grasberg Cu-Au deposit, Papua, Indonesia. Economic Geology, 100(5), 1005-1020.
Köppen climate type:Af : Tropical rainforest climate

Gigantic porphyry copper-gold deposit.
Reserves of 1.7 billion tonnes of ores grading at 1.1% Cu and 1.2 g/t Au.

The largest gold mine and the third largest copper mine in the world.

It is owned and operated by Freeport Indonesia (PTFI), a subsidiary of US-based Freeport-McMoRan Copper & Gold Inc. (FCX). Rio Tinto has a joint venture with FCX for a 40 per cent share of production above specific levels until 2021, and 40 per cent of all production after 2021.

Mineral List

28 valid minerals.

Rock Types Recorded

Note: this is a very new system on and data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

Paleogene - Cretaceous
23.03 - 145 Ma

ID: 3186135
Mesozoic-Cenozoic sedimentary rocks

Age: Phanerozoic (23.03 - 145 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Van Nort, S.D., Atwood, G.W., Collinson, T.B., Flint, D.C., and Potter, D.R. (1991) Geology and mineralization of the Grasberg porphyry copper-gold deposit, Irian Jaya, Indonesia. Mining engineering, 43(3), 300-303.
Mealey, G.A. (1996) Grasberg. 384 pp. Freeport- McMoRan Copper & Gold Co. ISBN 0 9652890 0 1.
Mathur, R., Ruiz, J., Titley, S., Gibbins, S., and Margotomo, W. (2000) Different crustal sources for Au-rich and Au-poor ores of the Grasberg Cu–Au porphyry deposit. Earth and Planetary Science Letters, 183(1), 7-14.
Pollard, P.J. and Taylor, R.G. (2002) Paragenesis of the Grasberg Cu–Au deposit, Irian Jaya, Indonesia: results from logging section 13. Mineralium Deposita, 37(1), 117-136.
Pollard, P.J., Taylor, R.G., and Peters, L. (2005) Ages of intrusion, alteration, and mineralization at the Grasberg Cu-Au deposit, Papua, Indonesia. Economic Geology, 100(5), 1005-1020.
Miller, S.D., Rusdinar, Y., Smart, R., Andrina, J., and Richards, D. (2006) Design and construction of limestone blended waste rock dumps: lessons learned from a 10-year study at Grasberg (Doctoral dissertation, ASMR).

External Links [Akuila Tawake (2012) Mineral Resources Potential and Mining in the Pacific Islands Region - Lessons Learned. Pacific-ACP States Regional Training Workshop on Geological, Technological, Biological and Environmental Aspects of Deep Sea Minerals. Tanoa International Hotel, Nadi Fiji. 13th–17th August 2012]

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