The Freitas Prospect is a 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.
Freitas Prospect MRDS details
Site Name
Primary: Freitas Prospect
Commodity
Tertiary: Manganese
Location
State: California
County: Alameda
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Freitas, William
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
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
Not available
Analytical Data
Not available
Materials
Not available
Comments
Comment (Production): TEN TONS OF MATERIAL HAS BEEN MINED AND STACKED (1918). NO PRODUCTION RECORDED. NO SHIPPING ORE COULD BE RECOVERED BY HAND SORTING. THE RELATIONS OF THIS BODY TO THE ADJACENT ROCKS ARE UNCERTAIN, BUT IT APPEARS TO BE OVERLAIN TO THE SOUTH BY GREENSTONE
Comment (Workings): SMALL OPEN CUT
Comment (Geology): GEOL.DESC: CUT EXPOSES A MASSIVE BED OF MANGANESE-BEARING MATERIAL, COMPOSED OF MAROON CHERT, FINELY POROUS PINK SILICA, AND STAINS AND FRACTURE FILLINGS OF MANGANESE OXIDES. THE RELATION OF THIS BODY TO THE ADJACENT ROCK IS UNCERTAIN, BUT IT APPEARS TO BE OVERLAIN TO THE SOUTH BY GREENSTONE.
Comment (Location): LOCATED IN NE 1/4 OF SE 1/4 OF SECTION 8
References
Reference (Deposit): BULL. 152, P.21
Reference (Deposit): CALIF. JOUR. MINES & GEOL. V. 46, NO.2, APRIL 1950, P.344, PL. 58
Reference (Deposit): DOM BULL. 125, P.99
Reference (Deposit): BULL. 140 , PL. 1 (GEOLOGY)
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.
