Cottonwood Grand Central Prospect

The Cottonwood Grand Central Prospect is a lead and silver mine located in Salt Lake county, Utah at an elevation of 7,441 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: Cottonwood Grand Central Prospect

Commodity

Primary: Lead
Primary: Silver
Secondary: Molybdenum
Tertiary: Zinc

Location

State: Utah
County: Salt Lake
District: Big Cottonwood District

Land Status

Land ownership: National Forest
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: U.S. Forest Service

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
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: N. Flank, Big Cottonwood Uplift

Type: L
Description: Silver Fork Fault

Alterations

Not available

Rocks

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

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

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

Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Mississippian

Analytical Data

Analytical Data: 545 ZN
Analytical Data: 125 PPM PB
Analytical Data: 35 PPM MO
Analytical Data: 50PPM CU
Analytical Data: DUMP SAMPLE 3.4 PPM AG
Analytical Data: 1.6 OZ AG/TON
Analytical Data: SAMPLE ASSAYED 7% PB

Materials

Ore: Galena
Ore: Sphalerite

Comments

Comment (Geology): CARBONATE ROCKS EAST OF THE FAULT SHOW LOCALLY INTENSE BLEACHING, WEAK MAGNETIC HIGHS ACROSS THE FAULT

Comment (Location): LOCATED ON THE EAST SIDE OF REYNOLDS GULCH ; INFO FROM LAND.ST :1977

Comment (Workings): IN 1924 THE MAIN TUNNEL WAS 840 FT. IN LENGTH, THE LOWER TUNNEL WAS 250 FT. IN LENGTH A 50 FT. RAISE ABOVE THE MAIN TUNNEL

References

Reference (Deposit): JAMES, L.P., 1979, GEOLOGY, ORE DEPOSITS, AND HISTORY OF THE BIG COTTONWOOD MINING DISTRICT, SALT LAKE CO., UTAH: UTAH GEOL. & MINERAL SURV. BULL-114.

Reference (Deposit): CRITTENDEN, M.D. JR, 1965, GEOLOGY OF THE MOUNT AIRE QUADRANGLE, SALT LAKE CO., UTAH: U.S. GEOLOGICAL SURVEY MAP GQ-379

Reference (Deposit): CALKINS, F.C. AND B.S. BUTLER, 1943, GEOLOGY AND ORE DEPOSITS OF THE COTTONWOOD-AMERICAN FORK AREA, UTAH: US. GEOL. SURY. PROF. PAPER 201

Reference (Deposit): BUTLER AND OTHERS, 1920, THE ORE DEPOSITS OF UTAH: U.S GEOL SURVEY PROF. PAPER III

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