Mine detail: Grand Island Mine

Previously called ''

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Location

Lat / long:

34.69726, -112.09491

Resource(M)

Primary:	Copper
Tertiary:	Gold
Ore:	Chalcopyrite, Tetrahedrite
Gangue:	Calcite, Quartz
Orebody form:	TABULAR
Other material:	Pyrite

Production

Operation type:	Unknown
Production size:	Small
Development status:	Producer

Geology

Host rock:	Shea Basalt;Deception Rhyolite Member Or Similar Metarhyolite
Host type:	Meta-Basalt,Rhyolite
Associated type:	Rhyolite,Basalt,Granite
Structure:	Foliation In Metavolcanic Rocks Trends N65e To N80e, Vein Trends Ne And Crosscuts Foliation In Precambrian Rocks
Alteration processes:	Minor Chlorite, Sericite In Country Rocks

References

MRDS	M002653
DEP	10027258
Reference	{Deposit:: ANDERSON, C.A. AND CREASEY, S.C., 1958 , GEOLOGY AND ORE DEPOSITS OF THE JEROME AREA, YAVAPAI COUNTY, ARIZONA: U.S.G.S. PROF. PAPER 308 , P. 153}{Deposit:: USGS BULL 782, P. 93}
Reporter	Gere, W., Johnson, Kris H. (Creasey, S.C.), Roth, Frances A. (Dewitt, Ed)