Horseshoe Mine

The Horseshoe Mine is a silver and copper mine located in Custer county, Idaho at an elevation of 8,399 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: Horseshoe Mine

Commodity

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

Location

State: Idaho
County: Custer
District: Alder Creek 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.
Administrative Organization: Challis National Forest

Holdings

Not available

Workings

Type: Surface/Underground

Ownership

Owner Name: Taylor, Ivan

Owner Name: U.S. Mining And Smelting Co.

Production

Year: 1928
Time Period: 1916-1928
Material type: ORE
Description: Cp_Grade: ^100 Oz Ag/Ton, 20 % Pb, Au, Zn ( 1917 )

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: White Knob Mountains

Mineral Deposit Model

Not available

Orebody

Form: LENS, IRREGULAR

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Oxidation

Rocks

Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Paleocene

Name: Granite
Role: Associated
Age Type: Host Rock
Age Young: Pliocene

Analytical Data

Analytical Data: ANOTHER ORE BODY 14 OZ AG/TON, $2 AU/TON, 6% CU
Analytical Data: SOME SAMPLES HAD 0.75 OZ AG/UNIT PB

Materials

Ore: Chalcopyrite
Ore: Sphalerite
Ore: Galena
Ore: Marmatite
Ore: Malachite
Gangue: Pyrrhotite
Gangue: Pyrite

Comments

Comment (Production): Item 15 Production Intermittent

Comment (Workings): Workings Caved, 6 Levels

Comment (Geology): Umpleby (1917) Labels Nelson and Ross' (1968) Leucogranite Porphyry As Granite Porphyry

References

Reference (Deposit): Leland, G. R., 1957, General Geology And Mineralization Of The Mackay Stock Area: Moscow, Idaho, Univ. Of Idaho, M. S. Thesis, 71 P.

Reference (Deposit): U.S. Bureau Of Mines Open-File Report MLA 6-91, 1991, Table A-4, No. 572, P. 239.

Reference (Deposit): Ross, C. P., 1930, Geology And Ore Deposits Of The Seafoam, Alder Creek, Little Smoky And Willow Creek Mining Districts, Custer And Camas Counties, Idaho: Idaho Bureau Of Mines And Geology Pamphlet 33, 26 P.

Reference (Deposit): Nelson, W. H., And Ross, C. P., 1968, Geology Of Part Of The Alder Creek Mining District, Custer County, Idaho: USGS Bulletin 1252-A, 30 P.

Reference (Deposit): USBM, 1975, Activity Of Idaho Mining Properties, 1974: USBM, Boise, Idaho, 61 P.

Reference (Deposit): 5) Salt Lake Mining Review, 1923, Mineral Resources And Opportunities Of Custer County, Idaho: Salt Lake Mining Review, V. 25, No. 6, P. 12-15.

Reference (Deposit): 6) Bell, R. N., 1918, Nineteenth Annual Report Of The Mining Industry Of Idaho For The Year 1917

Reference (Deposit): 7) USBM, 1938-1953, Gold, Silver, Copper, Lead, And Zinc In Idaho: USBM Mineral Yearbooks For 1937-1950

Reference (Deposit): 1918 Compile State Mine Inspector'S Annual Report For 1917

Reference (Deposit): 1930 Geolmap Idaho Bureau Of Mines And Geology Pamphlet 33

Reference (Production): Items 8-14, Leland, G. R., 1957, Univ. Of Idaho, M. S. Thesis; Item 8 Grade, Bell, R. N., 1918, Mining Industry Report For 1917; Item 15, USBM, 1938-1953, Mineral Yearbooks For 1937-1950; Item 1, USBM, 1945, Mineral Yearbook For 1943; Item 2, USBM, 1948, Mineral Yearbook For 1946

Reference (Deposit): 1938 Compile USBM Mineral Yearbooks For 1937-1950

Reference (Deposit): 1968 Geolmap Nelson, W. H. And Ross, C. P., Bulletin 1252-A

Reference (Deposit): 1975 Compile USBM Activity Of Idaho Mining Properties, 1974

Idaho Gold

"Where to Find Gold in Idaho" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Idaho. Read more: Where to Find Gold in Idaho.