The Ace of Spades is a chromium mine located in Tuolumne county, California at an elevation of 1,250 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: 1,250 Feet (381 Meters)
Commodity: Chromium
Lat, Long: 37.80139, -120.37778
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.
Ace of Spades MRDS details
Site Name
Primary: Ace of Spades
Secondary: Redfox claim (1941)
Commodity
Primary: Chromium
Tertiary: Iron
Location
State: California
County: Tuolumne
District: Marsh Flats 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
Type: Located Claim
Workings
Not available
Ownership
Owner Name: J. Ruolf, H.E. Egan, H. Heniker
Info Year: 1976
Owner Name: Johnson, Lee B.
Info Year: 1941
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Surface-Underground
Discovery Year: 1917
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
Form: Lense
Structure
Type: L
Structure: Highly sheared host rock
Alterations
Alteration Type: L
Alteration: Carbonitization
Alteration Type: L
Alteration: Complete serpentinization of host rock
Rocks
Not available
Analytical Data
Analytical Data: USBM grab sample of ore assayed 21.8% Cr2O
Materials
Ore: Chromite
Comments
Comment (Deposit): Discovery Year: WWI
Comment (Deposit): DEPOSIT CONSISTS OF A SERIES OF SMALL LENSES STRIKING FROM N 50 E TO N 25 W AND DIPPING STEEPLY TO THE EAST.
Comment (Development): 35-40 TONS OF ORE MINED IN 1918 ON THE DUMPS.
Comment (Geology): THE MINE IS LOCATED IN THE EASTERNMOST AND LARGEST OF TWO SERPENTINE BELTS THAT TREND NW ACROSS THE COUNTY. THE BELT IS EXPOSED OVER AN AREA 30 KM BY 6 KM AND CONTAINS MOST OF THE COUNTY'S CR DEPOSITS.
Comment (Location): A SHORT DISTANCE ABOVE THE BOTTOM OF RESERVOIR GULCH AND NE OF IT.
Comment (Workings): WORKINGS CONSISTED OF THREE SMALL PITS AND A 15 FT SHAFT (1945)
Comment (General): Doug Causey - Incorporated data from 2 duplicate records and deleted them (DEP_ID 10238809, 10043695)
References
Reference (Deposit): Cater, F.W., Jr., 1948, California Division of Mines BULL 134 PT. 3 CHAP. 1 P. 15 and PL. 1
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.
