Ace of Spades

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

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.

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.