The U.S. Gypsum Co. is a gypsum-anhydrite mine located in Imperial 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
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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.
U.S. Gypsum Co. MRDS details
Site Name
Primary: U.S. Gypsum Co.
Secondary: California Gypsum Group
Secondary: Imperial Gypsum and Oil Corporation
Secondary: Fish Creek Mountains
Secondary: Gillette
Secondary: Pacific Portland Cement
Secondary: Tracts 68, 69, 70, 78, Ward
Commodity
Primary: Gypsum-Anhydrite
Tertiary: Sodium
Tertiary: Manganese
Tertiary: Iron
Tertiary: Mica
Location
State: California
County: Imperial
District: Fish Creek Mountains
Land Status
Land ownership: BLM Administrative Area
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Administrative Organization: Cdca 372
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1922
Years of Production:
Organization:
Significant: N
Deposit Size: L
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Salton Trough
Physiographic Detail: Pennisula Mountains
Mineral Deposit Model
Not available
Orebody
Form: BLANKET
Structure
Not available
Alterations
Not available
Rocks
Name: Clastic Sedimentary Rock
Role: Host
Age Type: Host Rock
Age Young: Miocene
Analytical Data
Not available
Materials
Ore: Gypsum
Gangue: Biotite
Gangue: Anhydrite
Comments
Comment (Deposit): FORM NORTHWEST LIMB OF A NORTHWEST-TRENDING SYNCLINE, AXIS OF WHICH LIES IN A BROAD VALLEY TO THE WEST. MINOR FOLDING.
Comment (Workings): THREE OPEN PITS. 1) 1800 FT LONG; 500 FT WIDE; A50 FT DEEP. 2) 1900 FT LONG, 400 FT WIDE, 100 FT DEEP. 3) 2500 FT LONG, 800 FT WIDE, 200 FT DEEP.
Comment (Geology): PARTS OF CONFORMABLE SEQUENCE OF MIOCENE SPLIT MOUNTAIN FORMATION, FISH CREEK GYPSUM, PLIOCENE MARINE IMPERIAL FORMATION.
Comment (Other Database): TC36247 AND TC36253 ARE NOT DUPLICATES (TINA WELLS 1/94)
Comment (Production): 1951 PLANT CAPACITY APPROXIMATELY 2500-3000 POUNDS (?)
Comment (Development): DRILLED WITH ARMSTRONG CHURN DRILL, BLASTED VERY UNIFORM IN GRADE, QUARRIED. ; ECON.COM: ANALYSIS OF ORE: SULPHURIC ANHYDRITE (SO3) - 47.17%; LIME 32.75%; CRYSTALLIZED WATER 18.75%; SILICA 0.92%; IRON OXIDE (FE2O3) 0.14%; ALUMINA 21%, MAGNESIUM 0.08%.
Comment (Location): 2.5 MILES NORTHEAST OF SPLIT MOUNTAIN.
References
Reference (Other Database): CIMRI
Reference (Deposit): MORTON, PAUL K., 1977, GEOLOGY AND MINERAL RESOURCES OF IMPERIAL COUNTY, CALIFORNIA, CALIFORNIA DIVISION OF MINES AND GEOLOGY, COUNTY REPORT NO. 7.
Reference (Deposit): SAMPSON, R.J., AND TUCKER, W.B., 1942, MINERAL RESOURCES OF IMPERIAL COUNTY, CALIFORNIA DIVISION OF MINES BULLETIN , VOL. 38, H2.
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.
