The Joerger Mine is a chromium mine located in El Dorado county, California at an elevation of 919 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: 919 Feet (280 Meters)
Commodity: Chromium
Lat, Long: 38.68417, -121.10167
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.
Joerger Mine MRDS details
Site Name
Primary: Joerger Mine
Commodity
Primary: Chromium
Location
State: California
County: El Dorado
District: Clarksville Area
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: Surface
Ownership
Owner Name: John Hancock Mutual Life Ins. Co. (Surface Rights)
Home Office: Boston, Ma
Owner Name: Burton, Bertha J.
Owner Name: Bankers Title Guaranty Co. (Mineral Rights)
Home Office: Sacramento, Ca
Production
Year: 1949
Time Period: 1914-1949
Material type: ORE
Description: Cp_Grade: ^10% Cr2o3
Year: 1918
Time Period: 1914-1918
Material type: ORE
Description: Cp_Grade: ^Milling Ore, 36% Cr2o3
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Trough
Physiographic Detail: Sierra Nevada Foothills
Mineral Deposit Model
Not available
Orebody
Form: TABULAR
Structure
Type: L
Description: Jointing Or Shearing Of Dunite Is N20e.
Alterations
Alteration Type: L
Alteration Text: Serpentinization
Rocks
Not available
Analytical Data
Analytical Data: CHROMITE VARIES FROM 5-50%
Materials
Ore: Chromite
Comments
Comment (Workings): IN ADDITION TO THE PIT, A NUMBER OF BULLDOZER CUTS MADE FOR PROSPECTING. MOST WORK DONE IN 1942.
Comment (Geology): MINE OCCURS ON EASTERN EDGE OF ULTRAMAFIC LINEAR MASS IN WESTERN METAMORPHIC BELT OF SIERRA NEVADA FOOTHILLS.
Comment (Deposit): CHROMITE OCCURS IN 5 ZONES OF LOW GRADE DISSEMINATED ORE.
References
Reference (Deposit): CDMG BULL 134, P. 126.
Reference (Production): STINSON, 1976, CDMG UNPUBLISHED REPORT.
Reference (Deposit): STINSON, M.C., 1976, MINERAL PROPERTY REPORT, CDMG UNPUBLISHED REPORT.
California Gold
"Where to Find Gold in California" 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 California. Read more: Where to Find Gold in California.
