The Twenty Grand is a gold and silver mine located in Mono county, California at an elevation of 5,600 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: 5,600 Feet (1,707 Meters)
Commodity: Gold, Silver
Lat, Long: 37.51278, -118.31944
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.
Twenty Grand MRDS details
Site Name
Primary: Twenty Grand
Commodity
Primary: Gold
Primary: Silver
Secondary: Lead
Secondary: Copper
Location
State: California
County: Mono
Land Status
Land ownership: National Forest
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
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: M
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Oxidation
Rocks
Not available
Analytical Data
Not available
Materials
Gangue: Quartz
Comments
Comment (Geology): GEOL.DESC: VEIN QUARTZ BRECCIATED AND RECEMENTED
Comment (Deposit): COMPRISES 10 CLAIMS ; INFO.SRC : 1 PUB LIT
Comment (Location): UTM ACC. NW 1/4 SE 1/4
Comment (Production): A SMALL AMOUNT OF ORE WAS PRODUCED IN 1936. SMELTER RECOVERY RAN 9.45%PB, 1.26% CU, 1.89 OZ/TON AG, AND 0.25 OZ/TON AU. THERE IS NO RECORD OF EARLY GOLD PRODUCTION AT THIS MINE.
Comment (Deposit): VEINS, 2 - 20 FT. THICK
Comment (Workings): 600 FT. ADIT, 120 FT. ADIT, 40 FT. ADIT, 60 FT. INCLINE, 40 FT. INCLINE W/200 FT. 15 DEGREE WINZE, 200 FT. ADIT, 2 300 FT. ADITS W/150 FT. OF CROSSCUTS AND DRIFTS. TOTAL UNDERGROUND DEVELOPMENT ABOUT 2000 FT.
References
Reference (Deposit): TUCKER, W. B., AND SAMPSON, R. J., 1940 , MINERAL RESOURCES OF MONO COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 36 , NO. 2 , P. 139 - 140 , PL. 1 .
Reference (Production): GOODWIN ( 1957 )
Reference (Deposit): GOODWIN, J. G., 1957 , LEAD AND ZINC IN CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 53 , NOS. 3 & 4 , P. 569 .
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.
