The Porter Property is a mine located in Nevada county, California at an elevation of 2,356 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: 2,356 Feet (718 Meters)
Commodity:
Lat, Long: 39.2547, -121.08080
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.
Porter Property MRDS details
Site Name
Primary: Porter Property
Commodity
Tertiary: Chromium
Tertiary: Iron
Location
State: California
County: Nevada
District: Nevada City
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
Type: Fee Ownership
Workings
Type: Underground
Ownership
Owner Name: Ng,Fe,And Jl Wright, J And Jl Allen
Percent: 100.0
Home Office: California
Info Year: 1976
Owner Name: Schmidt, A. J. (Last Operator)
Home Office: California
Info Year: 1976
Years: 1918 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Surface-Underground
Mining Method: Unknown
Year First Production: 1918
Discovery Year: 1917
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Unknown: Chromite
Unknown: Olivine
Unknown: Pyroxene
Unknown: Serpentine
Comments
Comment (Deposit): DISSEMINATED ORE WAS HAND SORTED TO MAKE PRODUCT AVERAGING 3 RCENT CR2O3 CR/FE NOT KNOWN MINE OPERATED ONLY IN 1918 -10 TONS OF ORE WERE MINED, BUT RECORDED SHIPMENTS TOTAL 893 LON MINE VISIT BY CDMG ON 5 JAN 1976 THE AVERAGE MINEABLE GRADE OF CHROMITE IS 32 PERCENT AND IRO PERCENT. INSUFFICIENT DATA FOR MATRIX CALCULATIONS. ANALYSIS BY CDMG IN 1976 GAVE FOLLOWING PERCENTAGES-MASSIVE 2 06.28,CR2O3 34.71,FEO 11.22,TOTAL FE 12.87,AL203 19.84,MGO CR/FE 2.38.DISSEMINATED ORE=S102 06.08,CR2O3 34.71,FEO 14.02 FE 17.69,AL203 16.06,MGO 12.44,CR/FE 1.73.
References
Reference (Deposit): RYNEARSON, GA 1953, CR IN SIERRAS CMDG BULL 134, PT3, CHS, P
Reference (Deposit): CAMERON,RC UNDATED,UNPUBL FIELD REPT,NEVADA CO NO. 202
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.
