Ok Tedi

Porphyry copper (Cu-Au) deposit in Western, Papua New Guinea

Names and other identifiers

GMRAP ID 539
Alternate names Mount Fubilan
Tract name Eastern Medial New Guinea Magmatic Belt, sub-tract a (009pCu7203a)
Site status deposit

Geographic location

Country Papua New Guinea
State or province Western
Geographic location 141.133333, -5.2
Geologic map unit 141.133333, -5.2
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 1.2Ma
Age determination method K-Ar
Age range 1.2 Ma
Age reference Bamford (1972, cites Page, unpub. data, 1970)
Minerals actinolite, biotite, bornite, chalcocite, chalcopyrite, chrysocolla, copper wad, covellite, cuprite/tenorite, diopside, epidote, galena, garnet, goethite/limonite, gold, hematite/specularite, kaolinite/illite/dickite, magnetite, marcasite, molybdenite, pyrite, pyrrhotite, sericite, sphalerite, turquoise
Associated rocks basalt dikes, breccia, feldspar porphyry, monzonite porphyry, skarn, conglomerate, diorite, diorite porphyry, limestone, monzodiorite, sandstone, shale, siltstone, syenodiorite
Tectonic setting postconvergence
Stratigraphic age Pleistocene

Commodity and development information

Development status Producer
Major commodities Cu
Tonnage (Mt) 854Mt
Cu grade (%) 0.64%
Mo grade (%) 0.011%
Au grade (g/t) 0.78g/t
Contained copper 5,500,000t
Gold-Moly ratio 71

Reference information

Comments Production 1984 to 2004, 478 Mt at 0.83% Cu, 7.2 g/t Au; reserve of 2004, 249.6 Mt at 0.84% Cu, 1.06 g/t Au. In concentrate: 17.0 g/t Au, 0.02 g/t Pt, 0.62 g/t Pd. Exposed.
Study area name Southeast Asia and Melanesia
References Andrew (1995); Bamford (1972); Davies and others (1978); Page (1975); Rush and Seegers (1990); Sillitoe (1995a); Stapleton (1993); Tarkian and Stribrny (1999); van Dongen and others (2007); Singer and others (2008); Page (unpub. data, 1970)
Site reference Hammarstrom and others (2013)
Andrew, R.L., 1995, Porphyry copper-gold deposits of the southwest Pacific: Mining Engineering, v. 47, no. 1, p. 33–38.
Bamford, R.W.E., 1972, The Mount Fubilan (Ok Tedi) porphyry copper deposit, territory of Papua and New Guinea: Economic Geology, v. 67, p. 1019–1033. (Also available at http://dx.doi.org/10.2113/gsecongeo.67.8.1019.)Davies, H.L., Howell, W.J.S., Fardon, R.S.H., Carter, R.J., and Bumstead, E.D., 1978, History of the Ok Tedi porphyry copper prospect, Papua New Guinea: Economic Geology, v. 73, p. 796–809. (Also available at http://dx.doi.org/10.2113/gsecongeo.73.5.796.)Page, R.W., 1975, Geochronology of late Tertiary and Quaternary mineralized intrusive porphyries in the Star Mountains of Papua New Guinea and Irian Jaya: Economic Geology, v. 70, p. 928–936. (Also available at http://dx.doi.org/10.2113/gsecongeo.70.5.928.)
Page, R.W., 1970, K-Ar dating of the Ok Tedi porphyry copper prospect, T.P.N.G: Australian Bureau of Mineral Resources Report (unpublished).
Rush, P.M., and Seegers, H.J., 1990, Ok Tedi copper-gold deposits, in Hughes, F.E., ed., Geology of the mineral deposits of Australia and Papua New Guinea: Melbourne, Australasian Institute of Mining and Metallurgy Monograph 14, p. 1747–1754.
Sillitoe, R.H., 1995a, Exploration and discovery of base- and precious-metal deposits in the Circum-Pacific region during the last 25 years: Tokyo, Society of Resource Geology, Resource Geology Special Issue no. 19, 119 p.
Singer, D.A., Berger, V.I., and Moring, B.C., 2008, Porphyry copper deposits of the world—Database and grade and tonnage models, 2008: U.S. Geological Survey Open-File Report 2008-1155, [45] p. and digital data, accessed December 31, 2013, at http://pubs.usgs.gov/of/2008/1155/.
Stapleton, K. E., 1993, Copper ore mining at Ok Tedi Mining Limited, Ok Tedi, Papua New Guinea, in Woodcock, J.T., and Hamilton, J.K., eds.: Australasian Institute of Mining and Metallurgy Monograph Series, no. 19, v. 1, p. 631–634.
Tarkian, M., and Stribrny, B., 1999, Platinum-group elements in porphyry copper deposits—A reconnaissance study: Mineralogy and Petrology, v. 65, p. 161–183. (Also available at http://dx.doi.org/10.1007/BF01161959.)van Dongen, Michael, Tomkins, A.G., Weinberg, R.F., 2007, Trace element remobilization in the Ok Tedi porphyry Cu-Au deposit, Papua New Guinea, in Andrew, C.J., and Borg, G., eds., Mineral exploration and research—Digging deeper: Society for Geology Applied to Mineral Deposits (SAG) Biennial Meeting, 9th, Dublin, Ireland, August 20–23, 2007, v. 1, p. 427–430. (Also available at http://users.monash.edu.au/~weinberg/PDF_Papers/Van%20Dongen%20et%20al%20'07%20SGA-Dublin.pdf.)