Mine detail: Stevens Group Mines

Previously called 'Mines=Molinar Alaska, Stella, Brunswick, Stevens-Stonewall JacksonStevens Lease'

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Location

Lat / long:

33.13482, -109.37343

Resource(M)

Primary:	Copper
Secondary:	Silver, Gold
Ore:	Chalcocite, Chalcopyrite, Chrysocolla, Cuprite, Dioptase, Galena, Pyrite
Orebody form:	IRREGULAR MASSES
Discovery year:	1872

Production

Operation type:	Unknown
Production size:	Small
Development status:	Producer
First production started:	1903
Last production ended:	1920

Geology

Host rock:	Modoc Limestone;Morenci Shale
Host type:	Limestone
Associated rock:	Morenci Granite Porphyry
Associated type:	Diorite,Diabase
Structure:	Fissure Veins In Limestone And Basal Granite Sequences; And Irregular Bodies On Or Near Contacts Of Intrusive Masses, Nne Striking Fault, With 45 Se Dip, Separates Sedimentary Rocks From Precambrian Granite Associated Porphyry Dike Is 200 Ft Thick
Tectonic:	Coronado Massif Surrounded By Peripheral Faults; Fault Block To East Of Massif Downthrown About 2000 Ft, Placing Carboniferous Limestones At Level Of Chase Creek
Alteration processes:	Minor

References

MRDS	M800397
DEP	10048274
Reference	{Deposit:: ABGMT-USBM FILE DATA}{Deposit:: ARIZONA DEPARTMENT OF MINERAL RESOURCES FILE DATA: STEVENS MINE}{Deposit:: USGS PP 43, P. 351-352}{Deposit:: BLM DISTRICT SHEET 837}{Deposit:: USBM FILES, STEVENS GROUP}{Deposit:: STEVENS, H.J., 1909, THE COPPER HANDBOOK, VOL IX, PAGE 1273, STEVENS COPPER CO}{Deposit:: WEED, W.H., 1920, THE MINES HANDBOOK, VOL. XIV, PAGE 236, STEVENS COPPER MINING CO}{Deposit:: LANGTON, J.M., 1973, ORE GENESIS IN THE MORENCI-METCALF DISTRICT; AMERICAN INSTITUTE OF MINING, METALLURGICAL, AND PETROLEUM ENGINEERS: TRANSACTION, VOL. 254, PAGE 256}
Reporter	Calder, Susan R.