Porgera Mine, Mt Kare Valley, Mt Hagen, Enga Province, Papua New Guinea

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. Epithermal style orebody hosted within thermally metamorphosed sediments of the cretaceous.

References:
- 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.

- http://www.mining-technology.com/projects/porgera