Summit Extension

The Summit Extension is a gold and copper mine located in Summit county, Utah at an elevation of 9,400 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: Summit Extension  

State:  Utah

County:  Summit

Elevation: 9,400 Feet (2,865 Meters)

Primary Mineral: Gold, Copper

Lat, Long: 40.61639, -111.55667

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 Summit Extension

Summit Extension MRDS details

Site Name

Primary: Summit Extension
Secondary: Summit Extension Shaft
Secondary: Summit Extension Incline, Silver King Western
Secondary: Silver King Coalition Mines Co.


Commodity

Primary: Gold
Primary: Copper
Tertiary: Iron


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: Silver King Western Manufacturing Co.
Home Office: Salt Lake City, UT


Production

Not available


Deposit

Record Type: Site
Operation Category: Producer
Deposit Type: Vein
Operation Type: Unknown
Discovery Year: 1875
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


Structure

Type: R
Description: Uinta-Conttonwood Arch, Sevier Overthrust Belt, Cordilleran Hingeline

Type: L
Description: Northeast Striking Fissure


Alterations

Alteration Type: L
Alteration Text: Pyrification, Bleaching, Iron Staining, Gypsum Veining, Oxidation


Rocks

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

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

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


Analytical Data

Analytical Data: ORE SUPPOSEDLY RAN $5 PER TON AU


Materials

Ore: Chalcopyrite
Ore: Malachite
Ore: Bornite
Ore: Gold
Ore: Hematite
Ore: Limonite
Gangue: Pyrite
Gangue: Gypsum


Comments

Comment (Deposit): NO PRODUCTION INFORMATION AVAILABLE ; INFO.SRC : 1 PUB LIT

Comment (Geology): NORTHEAST STRIKING FISSURE HERE APPEARS TO CORRELATE WITH NORTHEAST FISSURE LOCATED AT THE COMSTOCK - CALIFORNIA MINE AREA.

Comment (Deposit): Discovery Year: 1870'S

Comment (Location): COORDINATES GIVEN ARE FOR SHAFT, SUMMIT EXTENSION INCLINE HAS UTM COORDINATES OF 4496100 N 452750 E. PROPERTY LOCATED IN SCOTTS PASS ; INFO FROM LAND.ST :1983

Comment (Commodity): GYPSUM ALSO PRESENT AS GANGUE

Comment (Development): SILVER KING WESTERN COMPANY IS CURRENTLY EXPLORING FOR PB-AG ORE. THEY THINK THAT THERE MAY BE AN OREBODY ON THE PROPERTY

Comment (Deposit): WHERE EXPLORED, DEPOSIT CONSISTS OF A FISSURE LOCALIZED ENTIRELY WITHIN THE GRANODIORITE STOCK, NO REPLACEMENT-TYPE MINERALIZATION IS PRESENT. AREA APPEARS TO BE THE SOUTHWESTERN EXTENSION OF THE PRODUCTIVE COMSTOCK-CALIFORNIA FISSURE.

Comment (Workings): WORKINGS CONSIST OF A SHAFT, AT LEAST 100 FT DEEP AND HAVING TWO DRIFTS, AND AN INCLINE AT LEAST 200 FT LONG.


References

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 (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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