California Mine Shop Tunnel

The California Mine Shop Tunnel is a lead, silver, and zinc mine located in Summit county, Utah at an elevation of 8,848 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

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Site Name

Primary: California Mine Shop Tunnel
Secondary: Silver King Coalition Group
Secondary: United Park City Mines

Commodity

Primary: Lead
Primary: Silver
Primary: Zinc
Tertiary: Copper

Location

State: Utah
County: Summit
District: Park City 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: Surface/Underground

Ownership

Owner Name: United Park City Mines Co.

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1881
Year Last Production: 1925
Discovery Year: 1885
Discovery Method: Ore-Mineral In Place
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: TABULAR

Form: TABULAR

Structure

Type: R
Description: Vinta-Cottonwood Arch, Sevier Overthrust Belt, Iron Hollow Syncline

Type: L
Description: Northeast Striking Fissures

Alterations

Alteration Type: L
Alteration Text: Oxidation

Rocks

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

Name: Plutonic Rock
Role: Associated
Age Type: Associated Rock Unit
Age Young: Oligocene

Analytical Data

Not available

Materials

Ore: Jamesonite
Ore: Sphalerite
Ore: Galena
Gangue: Calcite
Gangue: Pyrite
Gangue: Quartz

Comments

Comment (Location): INFO FROM LAND.ST :1983

Comment (Workings): THE UPPER TUNNEL EXTENDS NORTHWESTWARD ABOUT 100 FT TO THE MAIN WORKINGS. MAIN WORKINGS COMPRISED OF AN EXTENSIVE STOPE A NORTHEAST DRIFT 600 FT LONG ON THE LEVEL ABOVE THE LOWER TUNNEL, AND TWO PARALLEL NORTHEAST DRIFTS 600 AND 400 FT LONG ON THE LOWER LEVEL. OTHER WORKINGS INCLUDE AN UPPER TUNNEL AND AN INTERMEDIATE LEVEL. INTERMEDIATE LEVEL CONNECTED WITH THE LOWER LEVEL BY A CHUTE AND WITH THE UPPER TUNNEL BY A 20 DEGREE INCLINED STOPE. ALSO ON PROPERTY IS A 18 FT DEEP SHAFT. TOTAL LENGTH OF WORKINGS IS ABOUT 3000 FT. LOWER TUNNEL ALSO CALLED THE MAIN TUNNEL. UPPER TUNNEL CALLED THE SHOP TUNNEL. A PROSPECT PIT IS LOCATED NEAR THE MOUTH OF THE SHOP TUNNEL

Comment (Deposit): Discovery Year: 1880'S

Comment (Development): PROSPECTING BEGAN AROUND 1880 WITH HEAVY PROSPECTING IN 1881, 1883, 1889, 1893 AND 1900. THE CALIFORNIA MINE SUSPENDED ITS OPERATIONS, IN EARLY 1883 BECAUSE OF HIGH WATER FLOW BUT REOPENED THAT YEAR. IN MARCH 1885 THE LOWER TUNNEL OR THE MAIN MINE TUNNEL WAS STARTED AFTER CONSIDERABLE LEAD-ZINC ORE HAD BEEN FOUND. OLD APEX MILL WAS PURCHASED AND REMODELED IN 1900 APEX MILL RUNNING IN 1900 AND GOOD ORE BODY DISCOVERED IN 1901. OWNERSHIP DISPUTES AROSE IN 1902 UNDER THE APEX LAW. PROPERTY WAS IN ACTIVE BY 1908. CONSOLIDATED WITH SILVER KING COALITION MINES CO. AROUND 1908. LATER CONSOLIDATED WITH UNITED PARK CITY MINES IN 1953

Comment (Geology): FAULTING WAS BOTH PRE-AND POST MINERAL IN AGE

Comment (Deposit): PROMINENT FRACTURE ZONE IS PRESENT STRIKING NORTHEAST AND DIPPING STEEPLY TO THE SOUTHEAST. THE MAIN ZONE OF FRACTURING IS THE FOOTWALL OF A PORPHYRY DIKE. MINERALIZATION IS WITHIN OR ADJACENT TO NORTHEAST STRIKING FISSURES. BOTH VEIN AND REPLACEMENT ORE BODIES ARE PRESENT. HOST ROCK FOR REPLACEMENT BODIES IS THIN-BEDDED SHALY LIMESTONES OF THE THAYNES FORMATION PROMINENT ORE BODY IS A LENS OF REPLACEMENT ORE IN THE FOOTWALL OF THE MAIN FRACTURE ZONE, BEING DIVIDED INTO A SERIES OF MINOR LENSES ADJACENT TO NORTHEAST FISSURES. STRONG STRATIGRAPHIC CONTROL. LESS ABUNDANT FISSURE DEPOSITS WHICH ARE SHOOTS IN THE FISSURE PLANES

References

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): BOUTWELL, J.M., 1912, GEOLOGY AND ORE DEPOSITS OF THE PARK CITY DISTRICT, UTAH: U.S. GEOLOGICAL SURVEY PROF. PAPER, NO. 77, 231 PP.

Reference (Deposit): ERIKSON, A.J., (EDITOR), 1968, PARK CITY DISTRICT, UTAH: GUIDEBOOK TO THE GEOLOGY OF UTAH, NO. 22, UTAH GEOLOGICAL SOCIETY.

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, 672 PP.

Reference (Deposit): BARNES, M.P., AND SIMOS, J.S., 1968, ORE DEPOSITS OF THE PARK CITY DISTRICT WITH A CONTRIBUTION ON THE MAYFLOWER LODE, IN ORE DEPOSITS OF THE UNITED STATES: AM. INST. METALL. ENG., V. II, P. 1102

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