The Thompson Ranch Occurrence is a chromium mine located in Nevada county, California at an elevation of 1,480 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: 1,480 Feet (451 Meters)
Commodity: Chromium
Lat, Long: 39.09472, -121.10750
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.
Thompson Ranch Occurrence MRDS details
Site Name
Primary: Thompson Ranch Occurrence
Commodity
Primary: Chromium
Location
State: California
County: Nevada
District: Wolf Creek 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
Not available
Workings
Not available
Ownership
Owner Name: Henry Yue
Years: 1918 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1918
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
Ore: Chromite
Comments
Comment (Workings): IN 1918 WORKINGS CONSISTED OF SHAFT 20 FT. DEEP, DRIFT 25 FT. LONG FROM BOTTOM OF SHAFT.
Comment (Deposit): COMPRISES 640 ACRES. REPORTS ON DEPOSITS IN SECS. 4, 5 AND 16 HAVE BEEN IN CONFLICT, BUT INFORMATION AS SHOWN ABOVE APPEARS TO BE CORRECT FOR THIS LOCATION.
Comment (Production): IN 1918, IT WAS REPORTED THAT 28 LONG TONS OF ORE HAD BEEN MINED & IT WAS THOUGHT THE ORE BODY MIGHT YIELD AS MUCH AS 300 LONG TONS. HOW MUCH OF ORE WAS ACTUALLY SHIPPED IS NOT KNOWN.
References
Reference (Deposit): D.O.M. BULL. 134, PT. III, CHAP. 5, PP. 247-8, P. 13
Reference (Deposit): CALIF. JOUR. MINES & GEOLOGY, V. 37, NO. 3, JULY 1941, P. 466
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.
