The Stirnaman is a manganese mine located in Amador 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.
Stirnaman MRDS details
Site Name
Primary: Stirnaman
Commodity
Primary: Manganese
Location
State: California
County: Amador
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Owner Name: J. L. And L. C. Wells
Years: 1953 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: M
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
Type: L
Description: Faulting And Folding Anticlinal Structure Plunges Northeast.
Alterations
Not available
Rocks
Name: Metasedimentary Rock
Role: Host
Age Type: Host Rock
Age Young: Late Permian
Name: Metasedimentary Rock
Role: Host
Age Type: Host Rock Unit
Age Young: Late Permian
Analytical Data
Not available
Materials
Ore: Psilomelane
Ore: Rhodonite
Comments
Comment (Geology): HOSTED IN CALAVERAS SERIES - L. ; GEOL.DESC: LENSES OF BOTRYOIDAL AND NODULAR PSILOMALENE 1 TO 8 FT. WIDTH IN MASSIVE META-CHERT. MASSIVE METACHERT (RECRYSTALLIZED TO FINE GRAINED QUARTZITE) ENCLOSED IN RHYTHMICALLY BEDDED WHITE METACHERT; FORMING BELT 30 TO 50 FT. WIDE OF META-CHERT SURROUNDED BY QUARTZ SERICITE SCHIST. STRUCTURE LOCALLY COMPLEX. EXPOSURES OF RHODONITE AT DEPTH.
Comment (Production): DURING WWI 250 TONS OF MANGANESE ORE SHIPPED. LEASED BY DR. J. T. STACY 1942-43 AND SOME ORE SHIPPED. IDLE SINCE 1943. ONE SHIPMENT IN 1942 RAN 52 PERCENT MANGANESE, 3 PERCENT IRON, AND 4.5 PERCENT SILICA
Comment (Workings): SMALL AND LARGE OPEN CUTS, TWO MAIN LEVELS OF STOPES, SURFACE BULLDOZING
Comment (Location): LOCATED IN SE 1/4 SECTION 24
References
Reference (Deposit): CALIF. JOUR. MINES & GEOL. V. 39, NO. 1, JAN. 1943, P. 71; V. 50, NO. 1, JAN. 1954, P. 202-3, 269
Reference (Deposit): USBM RI 5579, P. 21-22
Reference (Deposit): D.O.M. BULL. 152 1950 PP. 34 - 35
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.
