The Old Ironsides Prospect is a mine located in San Diego county, California at an elevation of 3,199 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
Elevation: 3,199 Feet (975 Meters)
Commodity:
Lat, Long: 33.15889, -116.81889
Map: View on Google Maps
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.
Old Ironsides Prospect MRDS details
Site Name
Primary: Old Ironsides Prospect
Commodity
Tertiary: Nickel
Tertiary: Copper
Tertiary: Cobalt
Location
State: California
County: San Diego
Land Status
Land ownership: National Forest
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: Valle, Howard And Paul
Home Office: 2424 - 5th Avenue, San Diego, CA
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: Lower California
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
Analytical Data
Analytical Data: AND 0.27 TO 0.65 PERCENT COPPER. SURFACE GOSSAN SAMPLES AVERAGE 0.5 PERCENT NICKEL.
Analytical Data: SAMPLES OF UNALTERED GABBRO, FROM DEPTH OF 160 FT FROM DIAMOND DRILL HOLE ASSAYED 0.77 PERCENT NICKEL, 1.46 PERCENT COPPER. GOSSAN FROM TRENCHES ASSAYED 0.11 TO 0.45 PERCENT NICKEL, 0.007 TO 0.35 PERCENT COBALT
Materials
Ore: Chalcopyrite
Ore: Pyrrhotite
Gangue: Hornblende
Gangue: Olivine
Gangue: Pyrite
Comments
Comment (Geology): GEOL.DESC: AREA UNDERLAIN BY GABBRO (SAN MARCOS OR CUYAMACA) UPON WHICH HAS DEVELOPED DARK BROWN GOSSAN THAT CROPS OUT OVER AREA 325 FT. LONG, AND ABOUT 50 FT. WIDE. EXPLORATION INDICATES DEPTH OF 60 FT,BELOW WHICH IS UNALTERED GABBRO. NICKEL AND COPPER-BEARING SULFIDES OCCUR SPARINGLY IN UNALTERED GABBRO, AND SEEM MORE PROMINENT IN GOSSAN. UNALTERED GABBRO CONTAINS PYRRHOTITE AND CHALCOPYRITE. GABBRO INTRUDED INTO LARGER QUARTZ DIORITE BODY.
Comment (Deposit): DEPOSIT EXPLORED IN 1954 UNDER DMEA CONTRACT BY TWO DIAMOND-DRILL HOLES, EACH 300 FT. DEEP.
Comment (Location): LOCATED IN NW 1/4 , SW 1/4 , SECTION 6
Comment (Reserve-Resource): SMALL TONNAGE OF MATERIAL INFERRED TO BE PRESENT IN DEPOSIT TO A DEPTH OF 100 FT.
References
Reference (Deposit): CORNWALL, H. R., 1966, USGS BULL. 1223, P. 41.
Reference (Deposit): WEBER, F.H., JR., 1963 , GEOLOGY AND MINERAL RESOURCES OF SAN DIEGO COUNTY, CALIF: CALIF. D.O.M. AND GEOL., COUNTY REPT. 3
Reference (Deposit): CHESTERMAN, C.W., 1976 , WRITTEN COMMUNICATION
Reference (Reserve-Resource): REFER. (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.
