Big Gulch

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

Name: Big Gulch

State:  California

County:  Amador

Elevation:

Commodity: Gold

Lat, Long: 38.49111, -120.66361

Map: View on Google Maps

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.


Satelite image of the Big Gulch

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

"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.