The Section 14 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.
Section 14 MRDS details
Site Name
Primary: Section 14
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: Lee Ogier
Owner Name: Phil Winegar
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: Sandstone
Role: Host
Age Type: Host Rock Unit
Age Young: Late Cretaceous
Name: Sandstone
Role: Host
Age Type: Host Rock
Age Young: Late Cretaceous
Analytical Data
Analytical Data: AVG. GRADE BETTER THAN 45 % MANGANES
Materials
Ore: Rhodochrosite
Comments
Comment (Production): MINE WORKED FOR A SHORT TIME IN 1918 AND 700 TONS OF ORE SAID TO HAVE BEEN SHIPPED, THE GRADE AVERAGING BETTER THAN 45 % MANGANESE. MOST OF THE ORE VISIBLE IN 1942 CONTAINED ABOUT 25% MANGANESE BUT A SMALL AMOUNT WAS ESTIMATED AT 45%.
Comment (Workings): TUNNEL (NOW CAVED), 15 FT. SHAFT NEAR PORTAL
Comment (Geology): ORE HOSTED IN FRANCISCAN COMPLEX - L. TO L. ; GEOL.DESC: BED OF MANGANESE OXIDES, THICKNESS OF 4 FT. WAS MORE OR LESS CONTINUOUS TO A DEPTH OF AT LEAST 40 FT. HANGING WALL APPARENTLY A FAULT WITH SANDSTONE BROUGHT AGAINST ORE; FOOTWALL IS WHITE CHERT. SOME RHODOCHROSITE WAS MINED. CARBONATE ORE IS MORE OR LESS COMPLETELY OXIDIZED.
References
Reference (Deposit): CALIF. JOUR. MINES & GEOL. V. 46, NO.2, P.340, PL. 58
Reference (Deposit): DOM BULL. 125, P.101
Reference (Deposit): BULL. 152, P.26
Reference (Deposit): BULL. 140 , P. 66 , 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.
