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Porgera Mine, Mt Kare Valley, Mt Hagen, Enga Province, Papua New Guinea
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Latitude: 5°30'S
Longitude: 143°0'E
 
 
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.

Mineral List

Andradite
Anhydrite
Arsenopyrite
Baryte
'Biotite'
Calcite
Chalcopyrite
'Chlorite Group'
Epidote
Freibergite
Galena
Gold
var: Electrum
Gypsum
'Hornblende'
'K Feldspar
var: Adularia'

Muscovite
var: Sericite

Prehnite
Pyrargyrite
Pyrite
Quartz
Quartz
var: Chalcedony

Roscoelite
Sphalerite
Tetrahedrite


25 entries listed. 18 valid minerals.

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References

Richards, J. P., McCulloch, M. T., Chappell, B. W., & 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., 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.


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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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