The Antioch is a silica mine located in Contra Costa 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.
Antioch MRDS details
Site Name
Primary: Antioch
Commodity
Primary: Silica
Location
State: California
County: Contra Costa
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
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
Not available
Materials
Not available
Comments
Comment (Geology): GEOL.DESC: FRIABLE, WHITE, IMPURE SILICA SANDSTONE BEDS STRIKE N70-80 DEG. W AND DIP 20-35 DEG. N. CHANNEL SAMPLES ANALYSED 85.8-89.6% SIO2, 4.4-6.9% AL2O3, AND 1.26-1.92% FE2O3. ABOUT 8,000,000 TONS AVAILABLE BASED ON 60-70% EXTRACTION; 838,000 TONS AVAILABLE TO OPEN-PITMINING IN BED AVERAGING 36'THICK WITH ABOUT 20' OF OVERBURDEN.
Comment (Production): 326,000 TONS OF SAND MINED BY ROOM-AND-PILLAR METHOD.
Comment (Workings): PRELIMINARY TESTS INDICATE QUALITY IMPROVEMENT WITH TREATMENT.
References
Reference (Deposit): SOUTHERN PACIFIC CO., MINERALS FOR INDUSTRY, NORTHERN CALIFORNIA, V. 2, P. 71
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.
