Mine detail: New Pass Deposit

Previously called ''

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Location

Lat / long:

39.66691, -117.45894

Resource(M)

Primary:	Silver, Gold
Secondary:	Manganese
Tertiary:	Copper, Lead
Ore:	Gold, Galena, Psilomelane, Pyrolusite, Wad
Gangue:	Quartz, Pyrite
Orebody form:	TABULAR
Discovery year:	1994

Production

Operation type:	Surface-Underground
Deposit type:	SEDIMENT-HOSTED, volcanic-hosted, DISSEMINATED
Production size:	Small
Development status:	Prospect

Geology

Host rock:	Augusta Mountain Formation
Host type:	Limestone,Siltstone,Volcanic Rock (Aphanitic)
Structure:	Thin, discontinuous veneers and lenses of gold-bearing jasperoid are exposed along a north-south volcanic/limestone contact for a strike length of 12,000 feet.
Alteration processes:	Volcanic rocks are locally silicified along the volcanic/limestone contact and jasperoid has formed along the volcanic/limestone contact for a strike length of more than two miles.

References

DEP	10310507
Reference	{Deposit:: Stewart and others, 1977}{Deposit:: The Denver Mining Record, 11/30/94}{Deposit:: NBMG MI-95}{Deposit:: Quest International, 1997}{Deposit:: The Northern Miner, 9/15/97.}{Deposit:: Long, K.R., DeYoung, J.H., Jr., and Ludington, S.D., 1998, Significant deposits of gold, silver, copper, lead, and zinc in the United States: U.S. Geological Survey Open-File Report 90-206A, 33 p.; 98-206B. one 3.5 inch diskette.}
Reporter	LaPointe, D.D., Schruben, Paul G.