The Brownstone is a tungsten and molybdenum mine located in Inyo county, California at an elevation of 9,249 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: 9,249 Feet (2,819 Meters)
Commodity: Tungsten, Molybdenum
Lat, Long: 37.38333, -118.71667
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.
Brownstone MRDS details
Site Name
Primary: Brownstone
Secondary: Brownstone Nos. 1 and 2
Commodity
Primary: Tungsten
Primary: Molybdenum
Location
State: California
County: Inyo
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
Type: Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
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
Analytical Data: .3-2.0% WO3, .1-.9% MO
Materials
Ore: Scheelite
Comments
Comment (Workings): 6 DRILL HOLES TOTALING 662 FT.
Comment (Commodity): CONTENT OF TUNGSTEN APPEARS HIGHER ON THE LIMESTONE SIDE OF THE TACTITE ZONE.
Comment (Geology): GEOL.DESC: TACTITE IS BORDERED BY GRANITE ON THE WEST MARBLE 65 FT. THICK ON THE EAST, APLITE DIKES 30 FT. OR MORE IN THICKNESS CUT ACROSS CONTACTS AND DIVIDE TACTITE AND LIMESTONE INTO RECTANGULAR BLOCKS.
Comment (Deposit): 0.3%-2% WO3, 0.1%-0.9% MO , LOCATED NEAR MARBLE-GRANITE CONTACT , LOCATED NEAR MARBLE-GRANITE CONTACT
References
Reference (Deposit): LEMMON, D.M.; TUNGSTEN DEPOSITS IN THE US; VOL. I; UNPUBLISHED DATA, P. 228-229.
Reference (Deposit): LEMMON, D.M. AND TWETO, O.L., 1962; TUNGSTEN IN THE US; USGS MAP, MR-25.
Reference (Reserve-Resource): LEMMON, D.M., UNPUBLISHED DATA
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.
