The Camp 9 Merchant, Cummings is a manganese mine located in Alameda county, California at an elevation of 1,499 feet.
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
Elevation: 1,499 Feet (457 Meters)
Commodity: Manganese
Lat, Long: 37.60139, -121.65028
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.
Camp 9 Merchant, Cummings MRDS details
Site Name
Primary: Camp 9 Merchant, Cummings
Commodity
Primary: Manganese
Location
State: California
County: Alameda
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Owner Name: M. K. Devany And John Kelly
Years: 1950 -
Owner Name: Frank Cummings
Years: 1917 - 1918
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Discovery Year: 1888
Years of Production:
Organization:
Significant: N
Deposit Size: L
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
Name: Chert
Role: Host
Age Type: Host Rock Unit
Age Young: Late Cretaceous
Name: Chert
Role: Host
Age Type: Host Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Rhodochrosite
Comments
Comment (Geology): ORE HOSTED IN FRANCISCAN COMPLEX - L. TO L. ; GEOL.DESC: SINGLE MASSIVE BED; LOWER PART OF ZONE. INVARIABLY A MASSIVE CHERT GRADING TO AN UPPER ZONE OF CARBONATE ORE WHICH OCCURS IN LENSES AND KIDNEYS. UPPER CONTACT OF ORE ZONE IS VERY CONTINUOUS AND IS STRONGLY STAINED BY MANGANESE OXIDES. ORE ZONE LIES WITHIN A BODY OF BEDDED RADIOLARIN CHERT AND SHALE AND LIES ESSENTIALLY PARALLEL TO THEM.
Comment (Location): LOCATED IN NE 1/4 SECTION 9
Comment (Production): PRODUCTION MORE THAN 1,000 TONS. MINE SITUATED ON WEST BANK OF A SMALL STEEP GULCH WHICH TRENDS SOUTHWEST TO THE ARROYO MOCHO. WAS UNCOVERED DURING CONSTRUCTION OF THE ARROYO MOCHO ROAD. FURTHER PROSPECTING IS WARRANTED AT SEVERAL POINTS. VEINLETS OF BLUE AMPHIBOLE WERE FOUND IN THE MASSIVE CHERT AT SEVERAL PLACES IN THE LOWER WORKINGS
Comment (Workings): TWO TUNNELS, ONE BELOW THE ARROYO MOCHO ROAD, THE OTHER ABOVE. WORKINGS ARE, IN PLACES, CONNECTED BY STOPES ALONG THE ORE ZONE.
Comment (Deposit): ADD. REF. NO.4. BULL. 140, PL. 1 (GEOLOGY); NO.5. DOM BULL. 176, 1957, P.326, 329; NO.6. USBM RI 5579, P.21
References
Reference (Deposit): CALIF. JOUR. MINES & GEOL. V. 46, NO.2, APRIL 1950, P.343, PL. 58
Reference (Deposit): DOM BULL. 125, P.96
Reference (Deposit): BULL. 152, P.17-18
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.
