Duplex Mine

The Duplex Mine is a gold, silver, and lead mine located in Clark county, Nevada at an elevation of 3,599 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

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.

Site Name

Primary: Duplex Mine
Secondary: Ixl Copper Claim

Commodity

Primary: Gold
Primary: Silver
Primary: Lead
Secondary: Copper
Secondary: Zinc
Tertiary: Molybdenum

Location

State: Nevada
County: Clark
District: Searchlight

Land Status

Land ownership: Private
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

Type: Surface

Ownership

Not available

Production

Year: 1907
Material type: ORE
Description: Ap_Grade: ^2.15 Oz Au & 9.96 Oz Ag/Ton, 26% Pb, 2.4% Cu.
Year: 1918
Material type: ORE
Description: Ap_Grade: ^3.5 Oz Au & 5.0 Oz Ag/Ton, 9% Pb, 2.5% Cu
Year: 1917
Material type: ORE
Description: Ap_Grade: ^1.5 Oz Au & 4.5 Oz Ag/Ton, 7% Pb, 2.5% Cu
Year: 1916
Material type: ORE
Description: Ap_Grade: ^1.32 Oz Au & 6.5 Oz Ag/Ton, 5% Pb, 3.7% Cu
Year: 1919
Material type: ORE
Description: Ap_Grade: ^2. Oz Au & 7.3 Oz Ag/Ton, 14.3% Pb, 2.7% Cu
Year: 1915
Material type: ORE
Description: Ap_Grade: ^1.40 Oz Au & 10 Oz Ag/Ton, 10% Pb, 3.8% Cu

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1898
Discovery Year: 1897
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Sonoran Desert
Physiographic Detail: New Berry Mountains

Mineral Deposit Model

Model Name: Polymetallic veins

Orebody

Form: TABULAR

Structure

Type: L
Description: Normal Faults (Fault Horses Occur Within The Vein)

Alterations

Not available

Rocks

Name: Andesite
Role: Associated
Age Type: Host Rock
Age Young: Paleocene

Name: Andesite
Role: Associated
Age Type: Associated Rock
Age Young: Paleocene

Analytical Data

Analytical Data: AVERAGE METAL CONTENT PER SHIPMENT WAS 3.97 OZ/T AG,11.97 % PB, 2.9 % CU, 1.63 % ZN. AVERAGE METAL CONTENT OF LOT S CONTAINING OVER 20 % PB WAS 4.45 OZ/T AU, 13.91 OZ/T AG, 36.34 % PB, 1.42 % CU, 1.63 % ZN.

Materials

Ore: Calamine
Ore: Chalcopyrite
Ore: Galena
Ore: Limonite
Ore: Wulfenite
Gangue: Hemimorphite
Gangue: Mottramite

Comments

Comment (Development): 1903 IT WAS ONE OF THREE MINES TO HAVE A MILL. 1904-1907 IT WAS OPERATED JOINTLY WITH THE GOOD HOPE MINE BY JOHN BROCKMAN. 1911-1915 IT WAS HELD BY THE HOMESTEAD MINING & MILLING CO.

Comment (Production): ORE PRODUCED IN 1903, 1906-1911, 1915-1934 TOTALLING MORE THAN $650000 IN VALUE (1939).

Comment (Location): ON THE HILL SOUTH OF SEARCHLIGHT

Comment (Workings): WORKINGS ARE ACCESSABLE FROM 3 SHAFTS, NEW YEARS GIFT, FRACTION & SEARCHLIGHT. THE MOST RECENT WORK WAS CARRIED ON THROUGH THE FRACTION SSHAFT. (1959). THERE ARE 8 LEVELS.

Comment (Geology): EXPLORATION EAST OF THE FAULT DOES NOT SEEM TO BE COMPLETE (1939) . MOST PRODUCTIVE PARTS OF THE VEIN WERE THOSE THAT WERE NEARLY HORIZONTAL.

Comment (Deposit): DUPLEX MINE INCLUDES 6 PATENTED CLAIMS. ; INFO.SRC : 1 PUB LIT; 3 FIELD OBSERV

References

Reference (Deposit): CALLAGHAM, E, 1939, GEOLOGY OF THE SEARCHLIGHT DIST., CLARK CO., NEV., USGS BULL 906-D, P. 165-172.

Reference (Deposit): LONGWELL, C.R., 1965, GEOLOGY AND MINERAL DEPOSITS OF CLARK CO., NEVNEV. BUREAU OF MINES BULL 62, PQ. 201.

Reference (Deposit): RANSOME, R.L., 1907, PRELIMINARY ACCOUNT OF GOLDFIELD, BULLFROG AND OTHE MINING DIST. INC SOUTHERN NEVADA, USGS BU.. 303, P.72.

Reference (Deposit): TINGLEY, J.V., 1983, FIELD OBSERVATION, NBMG, 4/27/83

Reference (Deposit): SCHILLING, J., 1962, NBMG REPORT 2.

Reference (Production): CALLAGHAM, E., 1939, GEOLOGY OF THE SEARCHLIGHT DIST, CLARK CO., NEV., USGS BULL 906-D, P. 170-171.

Nevada Gold

Nevada has a total of 368 distinct gold districts. Of the of those, just 36 are major producers with production and/or reserves of over 1,000,000 ounces, 49 have production and/or reserves of over 100,000 ounces, with the rest having less than 100,000 ounces. Read more: Gold Districts of Nevada.