Porter Property

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

Name: Porter Property  

State:  California

County:  Nevada

Elevation: 2,356 Feet (718 Meters)

Primary Mineral:

Lat, Long: 39.2547, -121.08080

Map: View on Google Maps


Satelite image of the Porter Property

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 indicate a claim status and does not necessarily indicate an area is open to prospecting.


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