Mine detail: Douglas Hill Mine

Previously called 'Nevada Douglas'

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Location

Lat / long:

38.95102, -119.2707

Resource(B)

Primary:	Copper
Secondary:	Silver
Tertiary:	Gypsum-Anhydrite, Gold
Ore:	Bornite, Chalcocite, Chalcopyrite, Chrysocolla, Covellite, Pyrite
Orebody form:	IRREGULAR

Production

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

Geology

Host rock:	Rhyolite To Dacite Volcanics;Qtz. Monzonite Porphyry
Host type:	Limestone
Associated rock:	Andesite To Dacite Tuff Breccia;Rhyolite, Tuff, Siltstone, Limestone
Associated type:	Monzonite,Diorite
Structure:	Yerington Batholith
Tectonic:	Complex Basin And Range Faulting
Alteration processes:	Shallow Oxidation, Albitic, Sericitic, Propylitic, Week Potassic

References

MRDS	M035873
DEP	10037697
Reference	{Deposit:: READ, T. T., 1912 , THE NEVADA DOUGLAS MINES, MINING AND SCIENTIFIC PRESS}{Deposit:: KNOPF, A., 1918 , GEOLOGY AND ORE DEPOSITS OF THE YERINGTON DIST., NEV. USGS PROF. PAPER 114 .}{Deposit:: EINAUDI, M. T., 1977 , PETROGENISIS OF THE COPPER-BEARING SKARN AT THE MASON VALLEY MINE, YERINGTON, NEV., ECON. GEOL., VOL. 70 , NO. 5 .}
Reporter	Fiebelkorn, J. B. (Stewart, J. H.)