Man Ridge

The Man Ridge is a manganese mine located in Alameda 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.

Site Name

Primary: Man Ridge
Secondary: Elliott
Secondary: Noble and Searles Lease
Secondary: Scott and Winegar Properties

Commodity

Primary: Manganese

Location

State: California
County: Alameda

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: Phil Winegar And Arthur Most
Years: 1942 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: M

Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Coast Ranges

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Name: Chert
Role: Host
Age Type: Host Rock Unit
Age Young: Late Cretaceous

Name: Chert
Role: Host
Age Type: Host Rock
Age Young: Late Cretaceous

Analytical Data

Analytical Data: ORE 10 TO 45 PERCENT MANGANESE

Materials

Not available

Comments

Comment (Production): NOBLE ELEC. STEEL CO.PRODUCED 600 TONS OF ORE FROM SE WORKINGS IN 1917; ELLIOTT AND SEARLES PRODUCED 350 TONS IN 1917 FROM THE NW WORKINGS. MR. WINEGAR WAS WORKING THE PROPERTY IN 1942

Comment (Geology): ORE HOSTED IN FRANCISCAN COMPLEX--L. TO L. ; GEOL.DESC: BEDS OF SILICEOUS MANGANESE ORE ENCLOSED IN SHALELY CHERT.

Comment (Workings): OPEN CUTS, SHORT ADITS - PLANS FOR STRIPPING UNDER WAY IN 1942

Comment (Deposit): ADD. REF. NO.4. BULL. 140, P.66, PL. 1; NO.5. 25 TH REPORT OF STATE MINERALOGIST, P.437; NO.6. BULL. 76, P.28; NO.7. USBM RI 5579, P.21

References

Reference (Deposit): CALIF. JOUR. MINES & GEOL. V. 46, NO. 2, P.340, PL. 58

Reference (Deposit): DOM BULL. 152, P.23

Reference (Deposit): BULL. 125, P.100

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.