The Dewey Mine is a copper mine located in Idaho county, Idaho at an elevation of 2,100 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: 2,100 Feet (640 Meters)
Commodity: Copper
Lat, Long: 45.9322, -116.01060
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.
Dewey Mine MRDS details
Site Name
Primary: Dewey Mine
Secondary: Evergreen and St. Patrick Veins
Secondary: Dewey-Byrd Mine
Secondary: Old Dewey Mines
Commodity
Primary: Copper
Tertiary: Lead
Tertiary: Silver
Tertiary: Gold
Location
State: Idaho
County: Idaho
District: Harpster District
Land Status
Land ownership: Private
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.
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Dewey Consolidated Mining And Smelting Co.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Year First Production: 1899
Discovery Year: 1899
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Columbia Plateau
Physiographic Section: Walla Walla Plateau
Physiographic Detail: Clearwater Mountains
Mineral Deposit Model
Not available
Orebody
Form: PINCH AND SWELL
Form: PINCH AND SWELL
Form: PINCH AND SWELL
Structure
Type: L
Description: Shattering & Brecciation
Alterations
Alteration Type: L
Alteration Text: Silicification, Sericitization, Gouge, Oxidation
Rocks
Name: Andesite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Permian
Name: Andesite
Role: Associated
Age Type: Associated Rock
Age Young: Late Permian
Name: Andesite
Role: Associated
Age Type: Host Rock
Age Young: Late Permian
Analytical Data
Not available
Materials
Ore: Malachite
Ore: Chalcopyrite
Gangue: Pyrite
Gangue: Quartz
Gangue: Chlorite
Gangue: Epidote
Comments
Comment (Location): Near Harpster
Comment (Development): Econ.Com: Low Grade Deposits
Comment (Deposit): 3 Or 4 Parallel Veins, Principal Veins Are The Evergreen, The Dewey, The St. Patrick
Comment (Geology): Andesite Flows Trend N 40 Deg E, Dip Steeply Se
References
Reference (Production): Anderson, A. L., 1956, Idaho Bureau Of Mines And Geology Pamphlet 34
Reference (Deposit): Anderson, A. L., 1956, The Geology And Mineral Resources Of The Region About Orofino, Idaho: Idaho Bureau Of Mines And Geology Pamphlet 34, 63 P
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.
