Horseman's Prospect

The Horseman's Prospect is a copper mine located in Nez Perce county, Idaho at an elevation of 3,399 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

Name: Horseman's Prospect  

State:  Idaho

County:  Nez Perce

Elevation: 3,399 Feet (1,036 Meters)

Primary Mineral: Copper

Lat, Long: 46.0678, -116.70940

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 Horseman's Prospect

Horseman's Prospect MRDS details

Site Name

Primary: Horseman's Prospect
Secondary: George Horseman's Property
Secondary: Winchester Copper


Primary: Copper
Secondary: Silver
Tertiary: Gold
Tertiary: Molybdenum


State: Idaho
County: Nez Perce
District: Deer Creek District

Land Status

Land ownership: BLM Administrative Area
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.


Type: Located Claim


Type: Surface/Underground


Owner Name: Svan P. Olander, Emily A. Olander

Owner Name: Svan P. Olander


Not available


Record Type: Site
Operation Category: Prospect
Operation Type: Surface-Underground
Discovery Method: Unknown
Years of Production:
Significant: N
Deposit Size: S


General Physiographic Area: Intermontane Plateaus
Physiographic Province: Columbia Plateau
Physiographic Section: Walla Walla Plateau

Mineral Deposit Model

Not available


Not available


Not available


Alteration Type: L
Alteration Text: Silicification


Name: Andesite
Role: Host
Age Type: Host Rock Unit
Age Young: Late Triassic

Analytical Data

Analytical Data: REPORTED 3% CU, 2 OZ AG, AND ABOUT 50 CENTS AU/TON.


Ore: Chalcopyrite
Ore: Molybdenite
Ore: Chrysocolla
Ore: Copper
Gangue: Pyrite
Gangue: Siderite
Gangue: Talc
Gangue: Calcite


Comment (Workings): Open Cuts, Tunnels, Small Shafts

Comment (Deposit): Bonanza Copper Vein Strikes S 57 Deg E, Dips 40 Deg S; Second Vein Series Strikes Slightly E. Of N.; Third Vein Series Strikes E-W.

Comment (Location): On Nez Perce-Lewis Counties Boundary; 11 Mi Sw Of Mason Butte; Property Is Situated Where Flat Timbered Summit Of Craig Mountain Changes To The Steep Grassy Slopes Of Salmon River Canyon.

Comment (Development): 9 Unpatented Claims And Some Patented Ground In Sec. 33.


Reference (Deposit): Livingston, D. C., And Laney, F. B., 1920, The Copper Deposits Of The Seven Devils And Adjacent Districts: Idaho Bureau Of Mines And Geology Bulletin 1, 105 P.

Reference (Deposit): Hubbard, C. R., 1956, Geology And Mineral Resources Of Nez Perce County: Idaho Bureau Of Mines And Geology County Rept. 1, 17 P.

Reference (Deposit): Hubbard, C. R., 1955, Idaho Bureau Of Mines And Geology Open-File Report, 6 P.

Idaho Gold

Where to Find Gold in Idaho

"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 at Where to Find Gold in Idaho.