The Booker Lease Occurrence is a chromium 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.
Booker Lease Occurrence MRDS details
Site Name
Primary: Booker Lease Occurrence
Secondary: Beckwith Ranch Mines
Commodity
Primary: Chromium
Location
State: California
County: Tuolumne
District: Chinese Camp Area
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Beckwith, R. B.
Production
Year: 1919
Time Period: World War I
Material type: ORE
Description: Cp_Grade: ^Avg. 36% Cr2o3
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: LENSE
Structure
Not available
Alterations
Not available
Rocks
Name: Serpentinite
Role: Host
Age Type: Host Rock
Age Young: Late Jurassic
Analytical Data
Analytical Data: ORE AVG. 36% CR2O3
Materials
Ore: Chromite
Comments
Comment (Deposit): ORE ZONE IS PARALLEL TO SCHISTOSITY IN THE SERPENTINE AND BROKEN UP BY A SERIES OF FAULTS.
Comment (Geology): THE DEPOSIT OCCURS IN THE NORTHERN PART OF THE WESTERN PART OF TWO SERPENTINE BELTS THAT TREND NW-SE ACROSS THE COUNTY. THE BELT IS EXPOSED OVER AN AREA 30 KM BY 6 KM.
Comment (Workings): WORKINGS CONSIST OF A LONG NARROW TRENCH.
References
Reference (Production): CDMG BULL 134, PT. 3, CHAPT. 1, P. 20
Reference (Deposit): CATER, F. W. JR., 1948, CDMG BULL 134, PART 3, CHAPT. 1, P. 20
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.
