The True Blue is a mine located in Calaveras county, California at an elevation of 2,041 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: 2,041 Feet (622 Meters)
Commodity:
Lat, Long: 38.1431, -120.51190
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.
True Blue MRDS details
Site Name
Primary: True Blue
Secondary: Genochio Mine
Secondary: Madrid Mine
Commodity
Tertiary: Chromium
Tertiary: Iron
Location
State: California
County: Calaveras
District: Murphys 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: Other
Workings
Type: Underground
Ownership
Owner Name: Margaret S. Shepard
Percent: 100.0
Home Office: California
Info Year: 1976
Owner Name: Genochio, Adolph
Home Office: California
Info Year: 1976
Years: 1942 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Surface-Underground
Mining Method: Unknown
Year First Production: 1917
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: Asbestos
Unknown: Chlorite
Unknown: Chromite
Unknown: Serpentine
Unknown: Talc
Comments
Comment (Deposit): TALIAFERRO(1918) STATES THAT ORE VARIED BETWEEN 30-35 PERCENT. NO ESTIMATES OF RESERVES MADE BUTCATER(1948) STATES THAT CON LE ORE REMAINS AT THE BOTTOM OF CAVED WORKINGS. TOTAL PROD 1039 LONG TONS. MINE VISTED 17 SEPT.1925. THE AVERAGE MINABLE GRADE OF CHROMITE IS 32% & IRON IS 7.2% INSUFFICIENT DATA FOR MATRIX CALCULATIONS. ANALYSIS BY CDMG IN 1976 GAVE FOLLOWING PERCENTAGES-MASSIVE 2 06.04,CR2O3 26.31,FEO 08.89,TOTAL FE 12.07,AL203 29.52,MGO CR/FE 1.92.
References
Reference (Deposit): CAL STATE,MINING BUR BULL 76 P.123, 1918
Reference (Deposit): CAL. DIV. MINES GEOL. BULL 134 PT3, CHAP 2, P.56-57
Reference (Deposit): COOP WAR MINERALS INVEST PROJ,CALAVERAS CO NO.17 TALIAFERRO
Reference (Deposit): MINES & MINERAL RESOURCES CALAVERAS.COUNTY REPT NO.2 P.22,12
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.
