The Black Oak Group is a gold mine located in Tuolumne 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
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.
Black Oak Group MRDS details
Site Name
Primary: Black Oak Group
Commodity
Primary: Gold
Tertiary: Zinc
Tertiary: Lead
Tertiary: Iron
Location
State: California
County: Tuolumne
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
Form: PINCH AND SWELL VEIN
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Sphalerite
Ore: Pyrrhotite
Ore: Gold
Ore: Galena
Ore: Marcasite
Comments
Comment (Geology): GEOL.DESC: THE VEIN SWELLS FROM 1 TO 25 FT. IN THICKNESS. SEVERAL BRANCHES OF THIS VEIN WERE IDENTIFIED COMMING FROM THE HANGING WALL BLOCK. THE DIORITE DIKE WHICH INTERSECTS THE FAULT ZONE IS 1 TO 2 FT. THICK, AND STRIKES N 55 E WITH A VERTICAL DIP. ON 1300 FT. LEVEL VEIN WAS FOUND TO BE FAULTED 110 FT. WEST. COARSE AT FAULT IS N 60 E WITH DIP OF 75 N.
Comment (Deposit): THIS GROUP OF CLAIMS INCLUDES THE BLACK OAK, LIVE OAK, CARRA, AND CARRA FRACTION.
Comment (Deposit): ORE FORMS IN KIDNEYS AND LENSES AT THE INTERSECTION WHERE A DIORITE DIKE CROSSES A FAULT ZONE.
Comment (Workings): SHAFT 1700 FT. ON 70 DEGREE INCLINE. ON 1700 FT LEVEL THE SHAFT IS 16 FT. IN THE FOOTWALL. LEVELS ON VEIN ARE 100 FT. APART. STOPING OPERATIONS AT 1000 , 1300 , 1400 AND 1500 FT. LEVELS.
References
Reference (Deposit): TUCKER, W. B., 1914 , TUOLUMNE COUNTY: CMB REPT. 14 , P. 138 - 140
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.
