The Usal Manganese Deposits is a mine located in Mendocino 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.
Usal Manganese Deposits MRDS details
Site Name
Primary: Usal Manganese Deposits
Commodity
Tertiary: Manganese
Location
State: California
County: Mendocino
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: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Coast Ranges
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Analytical Data: ORE GRADE 10 TO 25 PERCENT MANGANESE, 25 TO 35 PERCENT IRON, AND 10 TO 15 PERCENT SILICA.
Materials
Not available
Comments
Comment (Geology): GEOL.DESC: MANGANIFEROUS IRON ORE REPLACING LIMESTONE IN A SERIES OF FELDSPATHIC SANDSTONE AND GREENSTONE. GREENSTONE CONSISTS OF FLOWS, TUFFS AND INTRUSIVE ROCKS OF APPROXIMATELY ANDESITIC COMPOSITION. LIMESTONE IS IN LENSES, AND REPLACEMENT BY MANGANIFEROUS IRON DECREASES TOWARD TOP.
References
Reference (Deposit): D.O.M. BULL. 152 1950 PP. 146 - 147
Reference (Deposit): D.O.M. BULL. 125 1943 P. 141
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.
