The Big Gulch is a gold 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.
Big Gulch MRDS details
Site Name
Primary: Big Gulch
Commodity
Primary: Gold
Tertiary: Manganese
Location
State: California
County: Amador
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Owner Name: State Of California
Home Office: California
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Deposit Type: Residual
Operation Type: Unknown
Discovery Year: 1940
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
Name: Andesite
Role: Associated
Age Type: Host Rock
Age Young: Pliocene
Name: Andesite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Analytical Data
Analytical Data: MANGANESE ORE BELOW 10 PERCENT
Materials
Ore: Psilomelane
Comments
Comment (Production): THE MANGANIFEROUS MATERIAL IS MOSTLY BELOW 10 PERCENT MANGANESE ALTHOUGH A FEW INDIVIDUAL SPECIMENTS WERE SEEN WHICH MIGHT RUN 30 PERCENT MANGANESE. NO COMMERCIAL ORE SIGHT.
Comment (Geology): GEOL.DESC: LOW-GRADE MANGANESE OXIDE (PSILOMELANE) IN LATERITIC SOILS BENEATH A LAVA CAP OF ANDESITIC BRECCIA. MANGANESE OXIDES CEMENT A REGOLITHIC BRECCIA WITH QUARTZ FRAGMENTS.
Comment (Deposit): LIMESTONE ALSO IN THIS SEC. (S 1/2)
Comment (Location): LOCATED IN NW 1/4 SECTION 4 IN AN OLD HYDRAULIC GOLD PROPERTY.
Comment (Workings): FEW SMALL SHALLOW PITS AND ONE CUT 14 FT. LONG, 3 FT. WIDE, 10 FT. DEEP
References
Reference (Deposit): CALIF. JOUR. MINES & GEOL. V. 50, NO. 1, JAN. 1954, P. 268
Reference (Deposit): DOM BULL. 152, P. 27
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.
