Michigan-Utah Mine

The Michigan-Utah Mine is a silver and lead mine located in Salt Lake county, Utah at an elevation of 9,439 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

Name: Michigan-Utah Mine  

State:  Utah

County:  Salt Lake

Elevation: 9,439 Feet (2,877 Meters)

Primary Mineral: Silver, Lead

Lat, Long: 40.59583, -111.61694

Map: View on Google Maps

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.


Satelite image of the Michigan-Utah Mine

Michigan-Utah Mine MRDS details

Site Name

Primary: Michigan-Utah Mine
Secondary: Grizzly Tunnel
Secondary: Cleave Tunnel
Secondary: Topeka Tunnel
Secondary: City Rocks Tunnel
Secondary: Butte Mine
Secondary: Black Bess Mine
Secondary: Solitude Tunnel
Secondary: Utah Mines Coalition
Secondary: Lavina
Secondary: Darlington
Secondary: Regulator
Secondary: Continental-Alta.


Commodity

Primary: Silver
Primary: Lead
Secondary: Copper
Secondary: Gold
Secondary: Manganese
Tertiary: Zinc
Tertiary: Molybdenum


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

Type: Underground


Ownership

Not available


Production

Year: 1919
Time Period: 1901-1919
Material type: ORE
Description: Cp_Grade: ^52 Cents/Ton Au, 16 Oz/Ton Ag, 9.12% Pb, 1.2% Cu


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1870
Year Last Production: 1928
Discovery Year: 1869
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: M


Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Middle Rocky Mountains
Physiographic Detail: Wasatch Mountains


Mineral Deposit Model

Not available


Orebody

Form: TABULAR

Form: TABULAR

Form: TABULAR


Structure

Type: R
Description: Sevier Overthrust Belt, Cordilleran Hinge Line, Uinta-Cottonwood Arch

Type: L
Description: Grizzly Overthrust Zone, Northeast Striking Fissures


Alterations

Alteration Type: L
Alteration Text: Bleaching, Minor Silicification, Calc-Silicates, Oxidation


Rocks

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Oligocene


Analytical Data

Analytical Data: ORE FROM ALL MINING DONE BETWEEN 1901 AND 1919 AVERAGED 52 CENTS/TON AU, 16.5 OZ/TON AG, 9.12% PB, AND 1.2% CU


Materials

Ore: Chalcopyrite
Ore: Galena
Ore: Smithsonite
Ore: Argentite
Ore: Sphalerite
Ore: Wad
Ore: Malachite
Ore: Gold
Gangue: Calcite
Gangue: Quartz


Comments

Comment (Workings): TOTAL LENGTH REPORTED INCLUDES SOLITUDE, BUTTE, AND BLACK BESS WORKINGS. MAIN PORTALS ARE TOPEKA, CLEVE, CITY ROCKS, SOLITUDE, AND BUTTE FOR THE CITY ROCKS FISSURES AND THE GRIZZLY FOR THE GRIZZLY-LAVINIA FISSURES. MINOR WORKINGS INCLUDE 17 SHORT ADITS AND 7 SHORT SHAFTS. LARGER WORKINGS NOT MENTIONED BEFORE INCLUDE SEVEN ADITS, AVERAGING 1250 FT. IN DEPTH.

Comment (Geology): PALEOZOIC UNITS RANGE FROM CAMBRIAN TINTIC QUARTZITE TO DESERET LIMESTONE. ALTA STOCK LIES TO SOUTH. DIKES HAVE NORTHEASTERLY STRIKE. BEDDING ABOUT 20 TO 30 DEGREES TO EAST. GRIZZLY THRUST IS TROUGH-LIKE

Comment (Location): UTM COORDINATES GIVE ABOVE ARE FOR PORTAL OF THE CLEAVE TUNNEL. COORDINATES FOR OTHER MAIN TUNNEL AS FOLLOWS, CITY ROCKS TUNNEL-4494020N, 448200E, ROLLINS TUNNEL-4494060N, 448250E, GRIZZLY TUNNEL-4494020N, 447810E ; INFO FROM LAND.ST :1983

Comment (Production): SEVERAL CARS OF HIGH GRADE MN ORE MARKETED DURING WWI. ORE TRANSPORTED BY AERIAL TRAMWAYS TO TANNERS FLAT AND THEN BY RAIL TO SALT LAKE VALLEY SMELTERS.

Comment (Development): EARLY WORK ON BUTTE AND BLACK BESS MINES. LATER MINES WERE CONSOLIDATED AND THE CITY ROCK AND GRIZZLY-LAVINIA FISSURES WERE EXPLOITED

Comment (Deposit): MOST PRODUCTION CAME FROM FISSURE DEPOSITS AND ASSOCIATED REPLACEMENT PODS. REPLACEMENTS FORMED AT INTERSECTIONS BETWEEN FAVORABLE LIMESTONE BEDS AND FISSURES. NUMEROUS FISSURES WERE MINED BUT MOST OF THE PRODUCTION CAME FROM THE CITY ROCKS AND GRIZZLY-LAVINIA FISSURE SYSTEMS. MINOR PRODUCTION CAME FROM CONTACT MAGNETITE-RICH, COPPER-BEARING REPLACEMENT BODIES NEAR DIKES. MOST FISSURES STRIKE N60E AND DIP STEEPLY TO THE NORTH. SOME REVERSAL OF DIPS SEEN ACROSS THE GRIZZLY THRUST FAULT.


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

Reference (Deposit): JAMES, L.P., 1979, GEOLOGY, ORE DEPOSITS, AND HISTORY OF THE BIG COTTONWOOD MINING DISTRICT, SALT LAKE COUNTY, UTAH: U.G.M.S. BULL. NO. 114

Reference (Production): CALKINS AND BUTLER, 1943


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