The Alta-Helena Tunnel is a copper mine located in Salt Lake county, Utah at an elevation of 9,551 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 9,551 Feet (2,911 Meters)
Commodity: Copper
Lat, Long: 40.58778, -111.60861
Map: View on Google Maps
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Alta-Helena Tunnel MRDS details
Site Name
Primary: Alta-Helena Tunnel
Secondary: Alta Helena Group
Commodity
Primary: Copper
Tertiary: Iron
Location
State: Utah
County: Salt Lake
District: Little Cottonwood District
Land Status
Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Middle Rocky Mountains
Physiographic Detail: Wasatch Mountains
Mineral Deposit Model
Not available
Orebody
Form: IRREGULAR
Structure
Type: R
Description: Uinta-Cottonwood Arch, Cordilleran Hingeline. Sevier Overthrust Belt
Type: L
Description: East-Northeast Striking Faults
Alterations
Alteration Type: L
Alteration Text: Oxidation, Contact Metasomatism
Rocks
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Oligocene
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Malachite
Gangue: Calcite
Gangue: Actinolite
Gangue: Chlorite
Gangue: Garnet
Gangue: Quartz
Gangue: Diopside
Gangue: Pyrite
Gangue: Epidote
Unknown: Magnetite
Comments
Comment (Location): TOWNSHIP IS UNSURVEYED ; INFO FROM LAND.ST :1983
Comment (Deposit): NINE PITS, ADITS, AND SHAFTS COMPRISE THIS GROUP OF WORKINGS ALL PROSPECTS WERE DEVELOPED ON CU + FE SKARN MINERALIZATION. IN THESE DEPOSITS, MALACHITE, AZURITE, AND RARE CHALCOPYRITE OCCUR IN MAGNETITE RICH SKARN BODIES HOSTED BY LIMESTONE AND LYING ADJACENT TO THE ALTA STOCK
Comment (Workings): IN ADDITION TO MAIN TUNNEL, TWO SHAFTS, 5 ADITS, AND TWO PROSPECT PITS ARE LOCATED ON PROPERTY TO NORTHEAST OF MAIN PORTAL.
Comment (Geology): PORTAL OF TUNNEL IS IN THE TINTIC QUARTZITE. STRATIGRAPHIC SEQUENCE UP TO THE DESERET LIMESTONE PRESENT ON PROPERTY. CONTACT OF ALTA STOCKWITH SEDIMENTS LIES ALONG NORTH EDGE OF PROPERTY. TWO EAST-NORTHEAST STRIKING FAULTS PRESENT
References
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.
Reference (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.
Reference (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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