Iron Duke

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

Name: Iron Duke  

State:  California

County:  Mariposa

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.


Satelite image of the Iron Duke

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

"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.