The Annex Chrome Mine is a mine located in Tuolumne county, California at an elevation of 1,250 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: 1,250 Feet (381 Meters)
Commodity:
Lat, Long: 37.9083, -120.49140
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.
Annex Chrome Mine MRDS details
Site Name
Primary: Annex Chrome Mine
Secondary: Richards Mine
Secondary: Rough and Ready Mine
Commodity
Tertiary: Iron
Tertiary: Chromium
Location
State: California
County: Tuolumne
District: Jamestown Area
Land Status
Land ownership: Private
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.
Holdings
Type: Fee Ownership
Workings
Not available
Ownership
Owner Name: Bradley Mining Co.,Leased 1942
Home Office: California
Info Year: 1976
Owner Name: Otis J Rosaco 1975
Percent: 100.0
Home Office: California
Info Year: 1976
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Surface-Underground
Mining Method: Unknown
Year First Production: 1918
Discovery Year: 1916
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
Not available
Analytical Data
Not available
Materials
Unknown: Olivine
Unknown: Serpentine
Unknown: Opal
Unknown: Magnetite
Unknown: Chromite
Comments
Comment (Deposit): INDICATED ORE RESERVES 7700 TONS CITED FROM RECORD 700. DUMP CONTAINS ORE MIXED WITH WASTE,MAY YIELD 40 TONS OF ORE. ORE EXPOSED IN PIT IN ZONE 6 FEETWIDE AND STRIKING N60W. EXPOSED ORE IS IN HIGHLY WEATHERED SERPENTINITE. INADEQUATE RESOURCES FOR COST ANALYSIS. ANALYSIS BY CDMG IN 1976 GAVE FOLLOWING PERCENTAGES-MASSIVE 2 02.00,CR2O3 38.37,FEO 12.87,TOTAL FE 17.69,AL203 24.04,MGO CR/FE 1.91.DISSEMINATED ORE=S102 01.47,CR2O3 40.92,FEO 11.01 FE 16.08,AL203 21.73,MGO 15.75,CR/FE 2.24
References
Reference (Deposit): ABOVE ARE CORRECT PROPERTY EXTENDS INTO SEC 30 T1N R14E
Reference (Deposit): IAFERRO
Reference (Deposit): CAL STATE MINING BUREAU BULL NO. 76,PP.214,1918,BRADLEY.
Reference (Deposit): COOPERATIVE WAR MINERAL INVEST INCAL.TUOLUMNE CO #16 UNPUB.1
Reference (Deposit): CDM AND G BULL. 134 PT 3 SIERRA NEVADA CHAP 1 PP 27-28 1948
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.
