Maxfield Mine

The Maxfield Mine is a lead and silver mine located in Salt Lake county, Utah at an elevation of 6,969 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: Maxfield Mine

Commodity

Primary: Lead
Primary: Silver
Secondary: Gold
Secondary: Copper
Tertiary: Iron

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

Owner Name: L. W. Hoskins

Production

Year: 1940
Time Period: 1902-1940
Material type: ORE
Description: Cp_Grade: ^.17 Oz/Ton Au, 52 Oz/Ton Ag

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Replacement
Operation Type: Unknown
Year First Production: 1880
Discovery Year: 1871
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: L

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: N. Flank, Big Cottonwood Uplift

Type: L
Description: Fissure (N To N20e, Steeply), Faulting

Alterations

Alteration Type: L
Alteration Text: Limestone Next To Dike Has Been Altered To Silicates Containing Epidote, Mica, Wollastonite, Diopside, Garnet. There Is No Ore In The Zone. Bleaching Of The Ls. Is Common

Rocks

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

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

Analytical Data

Analytical Data: 19.7% PB
Analytical Data: 1.4% CU
Analytical Data: 51.8 OZ AG/TON
Analytical Data: AVERAGE GRADE OF ORE BETWEEN 1902-1940 0.165 OZ AU/TON

Materials

Ore: Malachite
Ore: Pyrite
Ore: Galena
Ore: Gold
Ore: Silver
Gangue: Garnet
Gangue: Diopside
Gangue: Sepiolite
Gangue: Quartz
Gangue: Wollastonite
Gangue: Calcite

Comments

Comment (Production): LINE G9: 0.17 OZ AU, 50 OZ AG, 20% PB, 1.5% CU

Comment (Workings): TWO ADITS (CAVED), SHORT ADIT, RAISES, WINZES, DRIFTS, CROSSCUTS AND LARGE STOPES TOTALING MORE THAN 15,000 FT., LOWER WORKING ARE FLOODED, ABOUT 1800 FT. OF VERTICAL INTERVAL PROBED.

Comment (Geology): THE MINE IS AT THE APEX OF A SMALL DIKE AND SILL SWARM, N 80=HYDROTHERMAL

Comment (Location): INFO FROM LAND.ST :1977

Comment (Deposit): MANY ORE BODIES WERE FOUND ALONG THE FAVORABLE HORIZON NEAR THE BASE OF THE GARDISON LIMESTONE

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: U.S. GEOL. SURV. PROF. PAPER, 201

Reference (Deposit): BUTLER AND OTHERS, 1920. THE ORE DEPOSITS OF UTAH: U.S. GEOL SURVEY PROF. PAPER 111

Reference (Production): JAMES, L.P., 1979, P. 51-52; CALKINS AND BUTLER, 1943, P. 102-103

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