The Mar John Mines Co. is a gold mine located in Calaveras county, California at an elevation of 2,201 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: 2,201 Feet (671 Meters)
Commodity: Gold
Lat, Long: 38.18694, -120.54750
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.
Mar John Mines Co. MRDS details
Site Name
Primary: Mar John Mines Co.
Secondary: Old Calaveras Group
Secondary: Calaveras
Secondary: Enchantress
Secondary: Oro Minto
Commodity
Primary: Gold
Secondary: Cobalt
Tertiary: Lead
Tertiary: Zinc
Location
State: California
County: Calaveras
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
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
Ore: Gold
Ore: Sphalerite
Ore: Pyrite
Ore: Galena
Gangue: Quartz
Comments
Comment (Commodity): COBALT MINED AT N. END OF PROPERTY
Comment (Location): UTM ACC SW 1/4 OF NW 1/4
Comment (Production): ACTIVE 1870'S - 1884 , FROM 1885 - 1938 INTERMITTENT WORK DONEOLD CALAVERAS GROUP WORKED AS EARLY AS 1872.
Comment (Deposit): VEINS, FIVE VEINS FROM 2 - 4 FT IN THICKNESS AND TREND NE, PRINCIPAL VEIN IS CALAVERAS (N 70 E AND DIPS SE). SMALL AMOUNTS OF DIORITE AND GABBRO ALSO IN DUMPS. IN COBALT PROSPECT SMALL AMOUNTS OF SMALTITE AND ERYTHRITE WITH ARSENOPYRITE FOUND IN QUARTZ STRINGER A FEW INCHES WIDE IN MICA SCHIST AND QUARTZITE. FIVE VEINS ARE; CALAVERAS 3 - 4 FT, WASHINGTON PESCIA 6 FT, INTERMEDIATE 1.5 FT, ENCHANTRESS 2 FT AND SOUTH BANK 2.5 FT IN THICKNESS
Comment (Geology): COUNTRY ROCK IS CALAVERAS FMN.
Comment (Workings): DEVELOPED BY 450 FT (MAR JOHN OR CALAVERAS) SHAFT WITH LEVELS AT 120 , 240 , 350 AND 450 FT AND A 350 FT SHAFT 400 FT TO SE. MOST OF STOPING BTWN TWO SHAFTS-CROSSCUTS DRIVEN TO NW AND SE FROM 350 FT LEVEL
References
Reference (Deposit): CLARK, W.B., LYDON, P.A., 1962 , MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY, CALIF. COUNTY REPORT 2 ; CALIF. DIV. OF MINES AND GEOLOGY, P 36 , 62 - 63 , 131 , 165 AND PLB
Reference (Deposit): LOGAN, C.A., FRANKE, H., 1936 , MINES AND MINERAL RESOURCES OF CALAVERAS CO.: CDM CALIF. JOUR. MINES & GEOL., VOL. 32 , NO. 3 , P. 271 - 4 , 304 AND 312
Reference (Production): CLARK ( 1962 )
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.
