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.
Primary Mineral: Silica
Lat, Long: 37.95194, -121.85472
Active Mining Claims
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Antioch MRDS details
Site NamePrimary: Antioch
County: Contra Costa
Operation Category: Producer
Operation Type: Unknown
Years of Production:
PhysiographyGeneral Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Coast Ranges
Mineral Deposit Model
|Comment: 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: 326,000 TONS OF SAND MINED BY ROOM-AND-PILLAR METHOD.|
|Comment: PRELIMINARY TESTS INDICATE QUALITY IMPROVEMENT WITH TREATMENT.|
Reference Category: Deposit
Reference: SOUTHERN PACIFIC CO., MINERALS FOR INDUSTRY, NORTHERN CALIFORNIA, V. 2, P. 71