Mine detail: Alta-Helena Tunnel

Previously called 'Alta Helena Group'

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Location: Salt Lake County, Utah, United States, North America
Lat / long: 40.58772, -111.60939
dep_id: 10014876
mrds_id: D011948
Commodity type: metallic
Major mineral: Copper
Trace mineral: Iron
Operation type: Unknown
Production size: No production occurred
Development status: Occurrence
ore: Chalcopyrite, Malachite
gangue: Actinolite, Calcite, Chlorite, Diopside, Epidote, Garnet, Pyrite, Quartz
other_matl: Magnetite
orebody_fm: IRREGULAR
alteration: Oxidation, Contact Metasomatism
conc_proc: Metasomatism
ore_ctrl: Contact Between Limestones And Alta Stock
Reporter: Shubat, Michael A.
hrock_unit: Ophir Shale;Fitchville Formation
hrock_type: Quartzite,Phyllite,Schist,Shale,Limestone,Dolomite
arock_unit: Alta Stock;Intermediate Dike
arock_type: Diorite
Structure: Uinta-Cottonwood Arch, Cordilleran Hingeline. Sevier Overthrust Belt, East-Northeast Striking Faults
tectonic: Basin And Range-Colorado Plateau Transition Zone
References:
  • 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
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