Mine detail: Empress Mine

Previously called 'Central MineNBMG Sample Sites 1190, 1191, 1192'

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Location

Lat / long:

37.26578, -117.30758

Resource(M)

Primary:	Silver, Gold
Secondary:	Copper, Lead
Ore:	Cerargyrite, Chalcocite, Galena, Hematite, Limonite, Malachite, Tetrahedrite
Gangue:	Hyalite, Kaolinite, Quartz, Sericite
Orebody form:	TABULAR
Other material:	Pyrite

Production

Operation type:	Unknown
Deposit type:	Vein
Production size:	Small
Development status:	Past Producer

Geology

Host type:	Granite
Associated rock:	Sylvania Pluton
Associated type:	Granite
Structure:	Minor Post-Mineral Faulting Of Small Displacement.
Alteration processes:	Oxidation, Kaolinization, Sericitization, Chloritization, Silica Flooding

References

MRDS	M242389
DEP	10047138
Reference	{Deposit:: BALL, S.H., 1907, USGS BULL 308, P. 182-189}{Deposit:: USBM, 1978, MILS DATA}{Deposit:: SMITH-BENTZ, 1983, FIELD EXAMINATION, NBMG, 7 MAY 83.}
Reporter	La Pointe, D.D. (Tingley, J.V.)