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

Names and other identifiers

Alternate names Ofi Creek, Mount Bini
Tract name Eastern Medial New Guinea Magmatic Belt, sub-tract b (009pCu7203b)
Site status deposit

Geographic location

Country Papua New Guinea
State or province Central
Geographic location 147.583333, -9.3
Geologic map unit 147.583333, -9.3
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 4.4Ma
Age determination method unknown
Age range 4.42 ±0.04 Ma
Age reference Singer and others (2008)
Minerals actinolite, anhydrite, biotite, carbonate, chalcopyrite, chlorite, epidote, galena, goethite/limonite, gold, hematite, kaolinite/illite, magnetite, molybdenite, pyrite, rutile, sericite, sphalerite, tetrahedrite/tennantite, tourmaline
Associated rocks breccia, quartz diorite porphyry, agglomerate, gabbro, limestone, clastic sediments, andesite, basalt, diorite, monzonite, phyllite, pyroclastics, slate
Tectonic setting postconvergence
Stratigraphic age Pliocene

Commodity and development information

Development status Prospect
Major commodities Cu
Tonnage (Mt) 276Mt
Cu grade (%) 0.28%
Mo grade (%) 0.0077%
Au grade (g/t) 0.3g/t
Ag grade (g/t) 1.75g/t
Contained copper 770,000t
Gold-Moly ratio 40

Reference information

Comments Surface Au anomaly >0.2 g/t; float, 2 km downstream Ofi Creek, with 20.7 g/t Au, 463 g/t Ag, 0.14% Cu, 0.6% Pb. Drill indicated 0.31% Cu and 0.47 g/t Au at depth from 104 to 339.2 m. Exploration.
Study area name Southeast Asia and Melanesia
References Anonymous (1996b); Dugmore and others (1998); Dugmore and others (1996); Leaman (1996); Frontier Resources Ltd. (2007a); Keele and Lindley (2004); Singer and others (2008)
Site reference Hammarstrom and others (2013)
Anonymous, 1996b, Pursuit, W. America explore in PNG: The Northern Miner, v. 82, April 22, p. 20.
Dugmore, M.A., Leamon, P.W., and Philip, R., 1996, Discovery of the Mt. Bini porphyry copper–gold–molybdenum deposit in the Owen Stanley Ranges, Papua New Guinea—A geochemical case history: Journal of Geochemical Exploration, v. 57, p. 89–100. (Also available at http://dx.doi.org/10.1016/S0375-6742(96)00018-0.)
Dugmore, M.A., Leamon, P.W., and Philip, R., 1998, Mount Bini copper gold deposit, in Berkman, D.A., and Mackenzie, D.H., eds., Geology of Australian and Papua New Guinean mineral deposits: Melbourne, Australasian Institute of Mining and Metallurgy, p. 843–848.
Frontier Resources Ltd., 2007a, Conceptual mining study shows the Kodu copper-gold-molybdenum to be a robust project and Frontier commits to a bankable feasibility study: Frontier Resources Ltd., Company Announcement, November 19, 2008, accessed February 10, 2010, at http://www.frontierresources.com.au/main_site/file_uploads/ downloads/ASX_Release_Positive_Conceptual_Mining_ Study_19Nov07.pdf.
Keele, R.A. and Lindley, I.D., 2004, Technical Report on Mt Bini, Central Province, Papua New Guinea: National Instrument 43-101 Technical Report submitted to the TSX-V, 39 p.
Leaman, P., 1996, The Mt. Bini porphyry copper-gold deposit and its tectonic setting, Papua New Guinea, in Porphyry Related Copper and Gold Deposits of the Asia Pacific Region Conference, Cairns, Australia, August 12–13, 1996, Proceedings: Glenside, South Australia, Australian Mineral Foundation, p. 13.1–13.10.
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/.