The Porterfield Prospect is a copper mine located in Lemhi county, Idaho at an elevation of 6,801 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: 6,801 Feet (2,073 Meters)
Commodity: Copper
Lat, Long: 45.0358, -113.82890
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.
Porterfield Prospect MRDS details
Site Name
Primary: Porterfield Prospect
Commodity
Primary: Copper
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
Type: Underground
Ownership
Owner Name: J. Porterfield
Years: 1925 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Deposit Type: Vein
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Lemhi Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: L
Structure: Fault
Alterations
Alteration Type: L
Alteration Text: Brecciation, Epidote
Rocks
Name: Volcanic Rock (Aphanitic)
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Volcanic Rock (Aphanitic)
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Malachite
Ore: Chalcopyrite
Gangue: Limonite
Gangue: Quartz
Unknown: Quartzite
Comments
Comment (Location): Se/4 Of The Ne/4 Of Sect. 27
Comment (Geology): Original Structures entry: Local - Fault In Last 50 Ft Of Adit Strikes N 65 Deg W, Dips 55 Deg Sw; Quartzite Strikes N 75 Deg W, Dips 65 Deg W
Comment (Geology): Original ore control entry: Fault Striking N 65 Deg W, Dipping 55 Deg S.
References
Reference (Deposit): Anderson, A. L., 1956, Geology And Mineral Resources Of The Salmon Quadrangle, Lemhi County, Idaho: Idaho Bureau Of Mines And Geology Pamphlet 106, 102 P.
Reference (Deposit): Ross, C. P., 1925, The Copper Deposits Near Salmon, Idaho: USGS Bulletin 774, P. 37.
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.
