The Stewart Mine 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.
Stewart Mine MRDS details
Site Name
Primary: Stewart Mine
Commodity
Primary: Manganese
Location
State: California
County: San Bernardino
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
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: Alluvium
Role: Host
Age Type: Host Rock
Age Young: Pliocene
Analytical Data
Analytical Data: AVERAGE GRADE LESS THAN 35 PERCENT MANGANESE.
Materials
Ore: Pyrolusite
Ore: Psilomelane
Comments
Comment (Location): LOCATED IN NW 1/4 SECTION 6 , UTM APPROX
Comment (Geology): GEOL.DESC: VERY SILICEOUS ORE
Comment (Geology): GEOL.DESC: FISSURE ZONES IN FANGLOMERATE IMPREGNATED WITH MANGANESE OXIDE. THE MAIN FISSURE HAS A SMOOTH FOOTWALL, GRADATIONAL HANGING WALL, STRIKES N. 10 TO 15 W., AND DIPS 65 TO 70 W. WALL ROCK IS POORLY SORTED SEDIMENTARY BRECCIA, WITH FRAGMENTS OF GRANITIC AND METAMORPHIC ROCKS, SANDSTONE, AND A FEW VOLCANIC ROCKS. ZONES ADJACENT TO THE FISSURES ARE CEMENTED, IMPREGNATED AND PARTLY REPLACED BY MANGANESE OXIDES. ORE IS MAINLY A SOFT, BLACK, CRYSTALLINE MINERAL, PROBABLY PYROLUSITE, AND SOME HARD PSILOMELANE. BROWN CALCITE MAY BE THE PRIMARY ORE.
References
Reference (Deposit): D.O.M. BULL. 152 1950 PP. 206 - 207
Reference (Deposit): D.O.M. BULL. 125 1943 P. 164
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.
