The O'Connor Ranch Deposits is a manganese mine located in San Luis Obispo 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.
O'Connor Ranch Deposits MRDS details
Site Name
Primary: O'Connor Ranch Deposits
Secondary: Mt. Bishop Mine
Commodity
Primary: Manganese
Location
State: California
County: San Luis Obispo
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
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 ABOVE 36 FT. LEVEL IS 45 TO 50 PERCENT MANGANESE, WHEN HAND SORTED.
Materials
Ore: Rhodochrosite
Comments
Comment (Geology): ORE HOSTED IN FRANCISCAN COMPLEX--L. TO L. ; GEOL.DESC: ORE BED IS LOCATED NEAR THE TOP OF A LENS OF FRANCISCAN CHERT. ORE IS OVERLAIN BY 10 FT. OF CHERT, AND CONSISTS OF LAYERS OF HARD OXIDE 0.5 INCH TO 2 INCHES THICK, SEPARATED BY PARTINGS 0.1 TO 0.2 INCH THICK PARTLY FILLED BY POWDERY SHALY MATERIAL OR OCHRE. BELOW 36 FT. LEVEL THE OXIDES GRADE INTO PRIMARY ORE OF BANDED RHODOCHROSITE AND MANGANIFEROUS CHERT, WHICH ARE BOTH VEINED BY RESINOUS BROWN NEOTOCITE.
Comment (Location): LOCATED IN SE 1/4 SECTION 19 , AND SW 1/4 SECTION 20 , UTM APPROX.
References
Reference (Deposit): D.O.M. BULL. 152 1950 PP. 235 - 236
Reference (Deposit): D.O.M. BULL. 125 1943 P. 170
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.
