Iron Duke

  

Mine Info

State: California

County: Mariposa

Elevation: 1,601 feet (488 meters)

Primary Mineral: Gold

Lat, Long: 37.62222, -120.21556



Iron Duke MRDS details

Site Name

Commodity

Location

Primary: "Iron Duke"
Primary: Gold
State: California
County: Mariposa
District: Hunter Valley
 

Land Status

Holdings

Workings

Land ownership:
Administrative Organization:
Type: Underground


Ownership

Production

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type:
Plant Type:
Plant Subtype:
Operation Type: Unknown
Mining Method:
Milling Method:
Year First Production:
Year Last Production:
Discovery Year:
Discovery Method:
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

Mineral Deposit Model

Orebody

General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada
Physiographic Detail:
Name:
Form:


Structure

Alterations

Rocks

Name: Slate
Role: Host
Description:
Age Type: Host Rock
Age in Years:
Dating Method:
Material Analyzed:
Age Young: Late Jurassic
Age Old:


Analytical Data

Materials

Ore: Gold
Ore: Marcasite
Gangue: Quartz


Comments

Comment Type:
Workings
Comment 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 Type:
Geology
Comment GEOL.DESC: AMADOR GROUP
Comment Type:
Production
Comment 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 Type:
Deposit
Comment VEIN BLUE LEAD VEIN IS INTERSECTED BY CUTTER VEINS AT ANGLES OF 45 - 90 DEGREES. CUTTER VEINS IN GREENSTONE.


References

Reference Category:
Deposit
Pages:
Reference: 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 .
URL:
Reference Category:
Deposit
Pages:
Reference: LAIZURE, C. MCK., 1928 , SAN FRANCISCO FIELD DIVISION IN TWENTY-FOURTH REPORT OF THE STATE MINERALOGIST: CALIFORNIA STATE MINING BUREAU, P. 133 .
URL:
Reference Category:
Production
Pages:
Reference: BOWEN & GRAY 1957
URL:

Did You Know.......

A mine is a hole in the ground, owned by a liar.
-Mark Twain

About The MRDS Mines Database

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.

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