The Iron Duke is a gold mine located in Mariposa county, California at an elevation of 1,601 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: 1,601 Feet (488 Meters)
Commodity: Gold
Lat, Long: 37.62222, -120.21556
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.
Iron Duke MRDS details
Site Name
Primary: Iron Duke
Commodity
Primary: Gold
Location
State: California
County: Mariposa
District: Hunter Valley
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Slate
Role: Host
Age Type: Host Rock
Age Young: Late Jurassic
Analytical Data
Not available
Materials
Ore: Gold
Ore: Marcasite
Gangue: Quartz
Comments
Comment (Workings): SINGLE COMPARTMENT 200 FT DEEP SHAFT INCLINED 61 DEG. 185 FT LEVEL DRIFT S TO CUTTER VEIN # 2 500 FT LONG, SECONDARY DRIFT 100 FT WEST, 30 FT RAISE. 75 FT DRIFT ON CUTTER VEIN 3 . PARTLY CAVED 35 FT SHAFT & SHALLOW SURFACE WORKINGS NEAR SPECIMEN HILL
Comment (Geology): GEOL.DESC: AMADOR GROUP
Comment (Production): TOTAL PRODUCTION $21,800 . DURING SINKING OF SHAFT, SMALL POCKET YIELDED 190 OZ AU. ONE POCKET IN SECONDARY DRIFT YIELDED $524 . $16,000 AU TAKEN FROM SPECIMEN HILL WORKING $3800 FROM SMALL STOPE AT JUNCTION BLUE LEAD & CUTTER VEIN AT 104 FT, $2000 FROM RAISE ON CUTTER #2. SULFIDE CONCENTRATES ABOUT $50 AU/TON
Comment (Deposit): VEIN BLUE LEAD VEIN IS INTERSECTED BY CUTTER VEINS AT ANGLES OF 45 - 90 DEGREES. CUTTER VEINS IN GREENSTONE.
References
Reference (Deposit): BOWEN, O. E., JR., GRAY, C. H., JR., 1957 , MINES AND MINERAL DEPOSITS OF MARIPOSA COUNTY, CALIFORNIA: CALIF. JOUR. MINES AND GEOLOGY, V. 53 , NOS. 1 AND 2 , PP 113 - 114 .
Reference (Deposit): LAIZURE, C. MCK., 1928 , SAN FRANCISCO FIELD DIVISION IN TWENTY-FOURTH REPORT OF THE STATE MINERALOGIST: CALIFORNIA STATE MINING BUREAU, P. 133 .
Reference (Production): BOWEN & GRAY 1957
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.
