High Plateau Mine

The High Plateau Mine is a chromium mine located in Del Norte county, California at an elevation of 2,598 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: High Plateau Mine  

State:  California

County:  Del Norte

Elevation: 2,598 Feet (792 Meters)

Commodity: Chromium

Lat, Long: 41.92806, -123.94917

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 High Plateau Mine

High Plateau Mine MRDS details

Site Name

Primary: High Plateau Mine
Secondary: Brown's Mine


Commodity

Primary: Chromium


Location

State: California
County: Del Norte


Land Status

Land ownership: National Forest
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

Not available


Ownership

Owner Name: Brown, Eugene R.
Home Office: Star Route, Highway 199, O'Brien, Ore., 97534; 503-596-2918


Production

Year: 1945
Time Period: 1937-1945
Material type: ORE
Description: Cp_Grade: ^50-55% Cr2o3


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1918
Year Last Production: 1958
Discovery Year: 1917
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: Klamath Mountains


Mineral Deposit Model

Not available


Orebody

Form: LENSE


Structure

Not available


Alterations

Alteration Type: L
Alteration Text: Partial Serpentinization Of Dunite


Rocks

Not available


Analytical Data

Analytical Data: CR TO FE RATIO OF 2.94-3.74 TO 1.
Analytical Data: 50-55% CR2O3


Materials

Ore: Chromite
Gangue: Uvarovite
Gangue: Magnetite


Comments

Comment (Deposit): THE DEPOSIT ORIGINALLY CONSISTED OF A SINGLE CONTINOUS TABULAR ORE BODY THAT HAS NOW BEEN BROKEN BY TWO LARGE FAULTS.

Comment (Workings): MINE DEVELOPED BY TWO ADITS WITH CROSSCUTS, DRIFTS AND RAISES.

Comment (Location): MINE LOCATED ON NORTH SIDE OF PERIDOTITE CANYON, ABOUT 250 FT. BELOW TOP OF RIDGE.

Comment (Reserve-Resource): STINSON, 1975, CDMG MINERAL PROPERTY REPORT, UNPUBLISHED


References

Reference (Deposit): STINSON, M.C., 1975, CDMG MINERAL PROPERTY REPORT, UNPUBLISHED

Reference (Production): STINSON, 1975, CDMG MINERAL PROPERTY REPORT, UNPUBLISHED

Reference (Deposit): WELLS, F.G., CATER, F.W., JR., AND RYNEARSON, G.A., 1946, CHROMITE DEPOSITS OF DEL NORTE COUNTY, CA.: CDMG BULL 134, PART 1, CHAPT. 1, P. 32-35, 37.


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