Joerger Mine

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

Name: Joerger Mine  

State:  California

County:  El Dorado

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.


Satelite image of the Joerger Mine

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

"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.