Apex Mine

The Apex Mine is a lead and silver mine located in Summit county, Utah at an elevation of 8,760 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

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.

Site Name

Primary: Apex Mine
Secondary: Silver King Coalition Group
Secondary: United Park City Mines
Secondary: Kearns and Keith Mine

Commodity

Primary: Lead
Primary: Silver
Secondary: Gold
Secondary: Zinc
Secondary: 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: 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: 1883
Year Last Production: 1892
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: Uinta-Cottonwood Arch, Sevier Overthrust Belt, Park City Anticline, Iron Hollow Syncline

Type: L
Description: Crescent Fault Zone

Alterations

Alteration Type: L
Alteration Text: Oxidation

Rocks

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

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

Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Triassic

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Triassic

Analytical Data

Not available

Materials

Ore: Sphalerite
Ore: Chalcopyrite
Ore: Galena
Ore: Tetrahedrite
Ore: Argentite
Ore: Gold
Gangue: Quartz
Gangue: Calcite
Unknown: Pyrite

Comments

Comment (Development): ORE STRIKES IN THE REBELLION AND CLIMAX MINES IN 1880 ATTRACTED PROSPECTORS TO THE AREA. THE APEX MINE WAS OPERATING AND PRODUCING BY 1883. ACTIVITY CEASED IN THE EARLY 1890'S. THE APEX PAID ITS FIRST DIVIDEND IN 1888. IN 1903 THE PROPERTY WAS CONSOLIDATED WITH OTHERS TO FORM THE KEARNS-KEITH MINE. PROPERTIES CONSOLIDATED LATER WITH SILVER KING COALITION MINES CO. IN 1908 AND WITH UNITED PARK CITY MINES CO. IN 1953

Comment (Deposit): BOTH REPLACEMENT AND FISSURE TYPE ORE BODIES PROBABLY PRESENT. REPLACEMENT BODIES LOCATED WITHIN THAYNES FORMATION ALONG THE FOOTWALL OF THE MAIN CRESCENT FAULT ZONE. REPLACEMENT HORIZONS STRONGLY CONTROLLED BY LIMESTONE BEDS IN PROXIMITY TO FEEDERS. MINERALIZATION PROBABLY CONTROLLED BY SUBSIDIARY FOOTWALL FRACTURES OF THE CRESCENT FAULT

Comment (Workings): A MAIN ACCESS TUNNEL IS 400 FT LONG AND LEADS TO A NARROW ZONE OF WORKINGS AT FOUR LEVELS ABOUT 300 FT IN LENGTH EACH. ALSO PRESENT ON PROPERTY IS A PROSPECT ADIT ADJACENT TO THE MAIN TUNNEL

Comment (Geology): WORKINGS ARE IN THE THAYNES FORMATION ALONG THE FOOTWALL OF THE MAIN CRESCENT FAULT. PRODUCTION PROBABLY CAME FROM REPLACEMENT AND VEIN DEPOSITS LOCATED ALONG SUBSIDIARY FRACTURES OF THE CRESCENT FAULT

Comment (Deposit): NO PRODUCTION FIGURES GIVEN ; INFO.SRC : 1 PUB LIT

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

References

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, JS.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

Reference (Deposit): BAKER, AA. CALKINS F.D., CRITTENDEN, M.D., JR., AND BROMFIELD, C.S., 1966, GEOLOGIC MAP OF THE BRIGHTON QUADRANGLE, UTAH: U.S., GEOL SURVEY GEOL. QUAD. MAP GQ-534

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