Last Chance Group Prospect

The Last Chance Group Prospect is a copper mine located in Cassia county, Idaho at an elevation of 7,799 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: Last Chance Group Prospect  

State:  Idaho

County:  Cassia

Elevation: 7,799 Feet (2,377 Meters)

Primary Mineral: Copper

Lat, Long: 42.1947, -113.63890

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 Last Chance Group Prospect

Last Chance Group Prospect MRDS details

Site Name

Primary: Last Chance Group Prospect


Primary: Copper


State: Idaho
County: Cassia
District: Stokes 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: Sawtooth National Forest


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Record Type: Site
Operation Category: Prospect
Deposit Type: Vein
Operation Type: Underground
Years of Production:
Significant: N
Deposit Size: S


General Physiographic Area: Intermontane Plateaus
Physiographic Province: Columbia Plateau
Physiographic Section: Snake River Plain
Physiographic Detail: Deep Creek Mountains

Mineral Deposit Model

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

Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous

Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Name: Granite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Analytical Data

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Ore: Malachite
Ore: Chrysocolla
Gangue: Quartz


Comment (Location): High Ridge Between Head Of Grape Cr. And Green Cr., 1 Mi N.E. Of Cache Peak.

Comment (Workings): Several Cuts And A Shallow Shaft


Reference (Deposit): Anderson, A. L., 1931, Geology And Mineral Resources Of Eastern Cassia County, Id: Idaho Bureau Of Mines And Geology Bulletin 14., 169 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.