Mine detail: Porphyry Knob

Previously called ''

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Location

Lat / long:

63.53916, -156.0257

Resource(M)

Primary:	Silver, Gold
Ore:	Arsenopyrite, Chalcopyrite, Gold, Pyrite, Stibnite
Gangue:	Quartz

Production

Operation type:	Unknown
Development status:	Prospect

Geology

Alteration processes:

The igneous rocks display intense levels of phyllic, silicic, and carbonate alteration. The sedimentary rocks exhibit local sericitic, silicic, carbonate, hornfels, and skarn alteration (Avalon Development, 1998; Duncan, 1999).

References

DEP	10308031
Reference	{Deposit:: McGinnis, M.F., McCoy, M.E., Nerup, M.R., and Barnett, D., 1997, Colorado Creek project Alaska, 1997 summary report: unpublished Placer Dome Exploration Inc. report, 37 p.}{Deposit:: Avalon Development Corp., 1998, Colorado Creek project, Ophir and Medfra quadrangles, southwest Alaska: report prepared for NovaGold Resources Inc., 9 p.}{Deposit:: Duncan, R.G., 1999, Colorado Creek project, Alaska, interim report: unpublished report for Poseidon Minerals Ltd., 22 p.}{Deposit:: Dashevsky, S.S., 2000, Colorado Creek project (Au) Innoko district, Alaska: unpublished report for Rosander Mining Company, 7 p.}
Reporter	C.E. Cameron