Mine detail: Isle Royal Mine

Previously called 'Isle Royale'

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Location

Lat / long:

31.85791, -110.7679

Resource(M)

Primary:	Copper
Secondary:	Silver
Tertiary:	Gold, Molybdenum, Tungsten
Ore:	Chalcocite, Chalcopyrite, Malachite, Molybdenite, Powellite
Orebody form:	PIPE
Discovery year:	1882

Production

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

Geology

Host rock:	Escabrosa Limestone;Horquilla Limestone;Abrigo Formation;Bolsa Quartzite
Host type:	Limestone
Associated rock:	Continental Granodiorite
Associated type:	Diorite
Structure:	Homoclinal, Tilting And Broad Open Folds In S, Extensive Faulting I N N, Nw Striking Thrust Fault With Limestone In Footwall And Granite In Hanging Wall, Normal Faulting
Tectonic:	Basin And Range
Alteration processes:	Pyrite-Chalcopyrite-Gossan; Skarn

References

MRDS	M050044
DEP	10039411
Reference	{Deposit:: SCHRADER, 1915, USGS BULL 582}{Deposit:: ABM, 1971, FIELDNOTES V. 1, NO. 2}{Deposit:: DREWES, 1971, USGS MAP I-613}{Deposit:: CREASEY, 1955, USGS BULL 1027-F}{Deposit:: KEITH, 1974, ABM BULL 189}
Reporter	Peterson, Jocelyn A.