The Last Chance Occurrence is a gold mine located in Lemhi county, Idaho at an elevation of 5,400 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
Elevation: 5,400 Feet (1,646 Meters)
Commodity: Gold
Lat, Long: 45.0092, -113.55940
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.
Last Chance Occurrence MRDS details
Site Name
Primary: Last Chance Occurrence
Commodity
Primary: Gold
Tertiary: Copper
Tertiary: Thorium
Location
State: Idaho
County: Lemhi
District: Mcdevitt 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: Salmon National Forest
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Tony Schwartz, Pete Samora
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Beaverhead Mountains
Mineral Deposit Model
Not available
Orebody
Form: STRINGERS
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Sericitization
Rocks
Name: Quartzite
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Quartzite
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Thorite
Gangue: Feldspar
Comments
Comment (Location): On Upper Pattee Creek about Mi above mouth of Poison Gulch and across creek from Idaho Thorium No. 3 ; Info From Land.St :(1978)
Comment (Commodity): Weak radioactivity
Comment (Workings): Both old cuts and adits
References
Reference (Deposit): Anderson, A. L., 1958, Uranium, Thorium, Columbium, And Rare Earth Deposits In The Salmon Region, Lemhi County, Idaho: Idaho Bureau Of Mines And Geology Pamphlet 115, 81 P
Reference (Deposit): Mines And Prospect Of The Dillon Quad, IBMG Mine And Prospect Map Series, V E Mitchel, Et Al
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.
