Porgera Mine, Mt Kare Valley, Mt Hagen, Enga Province, Papua New Guinea
|Latitude & Longitude (WGS84):||5° 30' South , 143° 0' East|
|Latitude & Longitude (decimal):||-5.50000,143.00000|
|Köppen climate type:||Af : Tropical rainforest climate|
A gold mine. Porgera was initially an underground operation, with open-pit mining becoming increasingly important from 1993 onwards. Underground production ceased in 1997 but was resumed in 2002. In 2005, 11% of the mine’s output came from underground, with the remainder sourced from open pits and low-grade ore stockpiles.
It is the second largest mine in Papua New Guinea and is regarded as one of the world's top ten producing gold mines.
Located at the head of the Porgera Valley, in rain forest covered highlands at an altitude of 2,200 to 2,700 m.
Mesothermal(-epithermal) style orebody hosted within thermally metamorphosed sediments of the Cretaceous.
19 valid minerals.
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 Macrostrat.org
66 - 252.17 Ma
|Mesozoic sedimentary rocks|
Richards, J.P., McCulloch, M.T., Chappell, B.W., and Kerrich, R. (1991) Sources of metals in the Porgera gold deposit, Papua New Guinea: evidence from alteration, isotope, and noble metal geochemistry. Geochimica et Cosmochimica Acta, 55 (2): 565-580.
Richards, J.P. and Ledlie, I. (1993) Alkalic intrusive rocks associated with the Mount Kare gold deposit, Papua New Guinea; comparison with the Porgera intrusive complex. Economic Geology (1993) 88 (4): 755-781.
Richards, J.P. and Kerrich, R. (1993) The Porgera gold mine, Papua New Guinea; Magmatic hydrothermal to epithermal evolution of an alkali-type precious metal deposit. Economic Geology: 88 (5): 1017-1052.
Richards, J.P., Bray, C.J., Channer, D.M.DeR., and Spooner, E.T.C. (1997) Fluid chemistry and processes at the Porgera gold deposit, Papua New Guinea. Mineralium Deposita 32: 119-132.
Ronacher, E., Richards, J.P., and Johnston, M.D. (2000) Evidence for fluid phase separation in high-grade ore zones at the Porgera gold deposit, Papua New Guinea. Mineralium Deposita 35: 683-688.