Mine detail: Alta-Helena Tunnel

Previously called 'Alta Helena Group'

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Location

Lat / long:

40.58772, -111.60939

Resource(M)

Primary:	Copper
Tertiary:	Iron
Ore:	Chalcopyrite, Malachite
Gangue:	Actinolite, Calcite, Chlorite, Diopside, Epidote, Garnet, Pyrite, Quartz
Orebody form:	IRREGULAR
Other material:	Magnetite

Production

Operation type:	Unknown
Production size:	None
Development status:	Occurrence

Geology

Host rock:	Ophir Shale;Fitchville Formation
Host type:	Quartzite,Phyllite,Schist,Shale,Limestone,Dolomite
Associated rock:	Alta Stock;Intermediate Dike
Associated type:	Diorite
Structure:	Uinta-Cottonwood Arch, Cordilleran Hingeline. Sevier Overthrust Belt, East-Northeast Striking Faults
Tectonic:	Basin And Range-Colorado Plateau Transition Zone
Alteration processes:	Oxidation, Contact Metasomatism

References

MRDS	D011948
DEP	10014876
Reference	{Deposit:: CALKINS, F.C., AND BUTLER, B.S., 1943, GEOLOGY AND ORE DEPOSITS OF THE COTTONWOOD-AMERICAN FORK AREA. UTAH: U.S. GEOLOGICAL SURVEY PROF. PAPER, NO. 201.}{Deposit:: BUTLER, B.S., LOUGHLIN, G.F., HEIKES, V.C., AND OTHERS, 1920, THE ORE DEPOSITS OF UTAH: U.S. GEOLOGICAL SURVEY PROF. PAPER, NO. 111.}{Deposit:: BAKER, A.A. CALKINS, F.C., CRITTENDEN, M.D., JR., AND BROMFIELD, C.S., 1966, GEOLOGIC MAP OF THE BRIGHTON QUADRANGLE, UTAH: U.S. GEOLOGICAL SURVEY GEOL. QUAD. MAP GQ-534}
Reporter	Shubat, Michael A.