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

Names and other identifiers

Alternate names Golpu, Namboanga
Tract name Eastern Medial New Guinea Magmatic Belt, sub-tract b (009pCu7203b)
Group name Wafi-Golpu Group
Included sites Golpu, Namboanga; Group includes Wafi-Golpu deposit.
Site status deposit

Geographic location

Country Papua New Guinea
State or province Morobe
Geographic location 146.45, -6.883333
Geologic map unit 146.45, -6.883333
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 9Ma
Age determination method unknown
Age range 9 Ma
Age reference Singer and others (2008)
Minerals actinolite, alunite, apatite, biotite, bornite, carbonate, chalcocite/digenite, chalcopyrite, chlorite, covellite, diaspore, dickite, enargite/luzonite, epidote, goethite/limonite, gold, hematite/specularite, jarosite, kaolinite/illite/dickite, magnetite, molybdenite, pyrite, pyrophyllite, sericite, smectite, tetrahedrite/tennantite, tourmaline
Associated rocks andesite porphyry, breccia, dacite porphyry, diorite porphyry, quartz diorite porphyry, conglomerate, sandstone, shale
Tectonic setting postconvergence
Stratigraphic age Miocene

Commodity and development information

Development status Prospect
Major commodities Cu, Mo, Au
Tonnage (Mt) 540Mt
Cu grade (%) 0.9%
Mo grade (%) 0.01%
Au grade (g/t) 0.56g/t
Contained copper 4,900,000t
Gold-Moly ratio 60

Reference information

Comments Morobe Mining JV between Harmony Gold Mining Co. and Newcrest Mining Ltd. Reported total resources for 2010 for Golpu and Nambonga (2 km from Golpu) porphyry deposits. Wafi is a high-sulfidation epithermal gold deposit associated with the same intrusive system. Minor supergene ore. Pre-feasability (2011).
Study area name Southeast Asia and Melanesia
References Andrew (1995); Corbett and Leach (1998); Freebrey (1998); Funnel (1990); Gillman (2004); Harmony Gold Mining Co. ( 2010); Newcrest Mining Ltd. (2010); Leach (1999); Lole (2005); Ryan and Vigar (1999); Tau-Loi and Andrew (1998); Singer and others (2008)
Site reference Hammarstrom and others (2013)