The Black Mountain Claims is a manganese mine located in San Bernardino county, California.
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
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.
Black Mountain Claims MRDS details
Site Name
Primary: Black Mountain Claims
Secondary: Gallagher
Commodity
Primary: Manganese
Tertiary: Iron
Tertiary: Copper
Location
State: California
County: San Bernardino
District: Ibex
Land Status
Not available
Holdings
Not available
Workings
Not available
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: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Sonoran Desert
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Gneiss
Role: Host
Age Type: Host Rock
Age Young: Late Cambrian
Analytical Data
Analytical Data: AVERAGE GRADE 35 PERCENT MANGANESE, 5 TO 15 PERCENT IRON OXIDES, 15 TO 25 PERCENT CALCIUM CARBONATE, 5 TO 15 PERCENT SILICA.
Materials
Ore: Pyrolusite
Ore: Psilomelane
Gangue: Calcite
Comments
Comment (Geology): GEOL.DESC: ORE OCCURS AS SMALL SCATTERED LENS-SHAPED BODIES IN GRANODIORITE GNEISS. ORE BODIES ARE IRREGULAR AND DISCONTINUOUS, USUALLY LESS THAN 10 FT. LONG, AND 6 INCHES TO 3 FT. WIDE. THE CONTACT WITH GNEISS IS SHARP, WITH ORE ENCASED IN A THIN SELVEDGE OF CREAM COLORED LIME CARBONATE. THE ORE IS MAINLY PSILOMELANE WITH CALCITE, AND POSSIBLY SOME PYROLUSITE.
References
Reference (Deposit): D.O.M. BULL. 152 1950 PP. 191 - 192
Reference (Deposit): D.O.M. BULL. 125 1943 P. 160
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.
