Old Democrat Mine

The Old Democrat Mine is a zinc, lead, and silver mine located in Lincoln county, Nevada at an elevation of 5,801 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: Old Democrat Mine
Secondary: NBMG Sample Site 1443
Secondary: Part of Comet Coalition Mines, Co, In 1949.

Commodity

Primary: Zinc
Primary: Lead
Primary: Silver
Secondary: Copper
Tertiary: Manganese
Tertiary: Iron
Tertiary: Cadmium
Tertiary: Arsenic
Tertiary: Antimony
Tertiary: Zirconium
Tertiary: Tin

Location

State: Nevada
County: Lincoln
District: Chief Districtdistrict

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Owner Name: Nerco
Years: 1983 -

Production

Year: 1932
Material type: ORE
Description: Ap_Grade: ^.89 Oz Au, 8 Oz Ag Per Ton, 1% Pb

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1892
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Model Name: Polymetallic replacement

Orebody

Form: TABULAR TO IRREGULAR

Structure

Type: L
Description: N18w Fault Zone At 400 Ft From Portal.

Alterations

Alteration Type: L
Alteration Text: Intense Silicification

Rocks

Name: Shale
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Cambrian

Name: Shale
Role: Associated
Age Type: Host Rock
Age Young: Late Cambrian

Analytical Data

Analytical Data: ASSAY AT PORTAL: 1.5 OZ/T AG, 0.5% PB, 1.5% ZN, 13-18% MN. SAMPLE 1443 CONTAINS 20% FE, GREATER THAN 5000 PPM MN, 100 PPM AG, 500 PPM AS, 1000 PPM BA, 500 PPM CD, 200 PPM CU, 10000 PPM PB, 100 PPM SN, 300 PPM SR, 10000 PPM ZN, 100 PPM ZR.

Materials

Ore: Sphalerite
Ore: Pyrolusite
Ore: Galena
Ore: Psilomelane
Ore: Manganite
Gangue: Pyrite
Gangue: Goethite
Gangue: Lepidocrocite
Gangue: Clay

Comments

Comment (Location): AT MOUTH OF PEASLEE CANYON

Comment (Commodity): BACKGROUND RADIOACTIVITY= 0.01 MR/HR; HIGH= 0.03 MR/HR.

Comment (Development): INCLINE WAS DRIVEN AS AN EXPLORATION PROSPECT BY INTERNATIONAL SMELTING AND REFINING CO. NERCO WAS DOING ASSESSMENT WORK IN THE AREA IN 1983.

Comment (Deposit): AT PORTAL, LIMESTONE IS ALTERED TO (OR REPLACED BY) GOSSANY FE AND MN OXIDES AND SILICA. 2 OR 3 GOSSANY BEDS AVERAGING 2-4 FT THICK ARE EXPOSED AT PORTAL. REPLACED BEDS ARE DARK GREY TO BLACK AND CHARACTERIZED BY SILICIC FE-MN BOXWORKS, POCKETS OF FE-MN OXIDES AND VUGS OF CLEAR VITREOUS QUARTZ. PORTIONS OF THE ALTERED ROCK ARE VERY STRONGLY SILICIFIED. REPLACED BEDS ARE DARKER IN COLOR THAN THE ORIGINAL HOST WHICH IS A DARK GREY FINELY CRYSTALLINE LIMESTONE DISPLAYING GIRVANELLA ALGAL FOSSIL CASTS. SAMPLE 1443 FROM THE DUMP CONSISTS OF BLACK SILICEOUS FE-MN RICH REPLACEMENT ORE (GOSSAN) WHICH IS QUITE HEAVY. THE ORE SHOWS PSILOMELANE ON SURFACES AND CONTAINS FINELY CRYSTALLINE GALENA, SPHALERITE AND MINOR PYRITE. BRIGHT YELLOW OXIDES ARE PRESENT ON SOME SURFACES OF SAMPLES. THE GOSSAN CONTAINS VUGS FILLED WITH LATE CALCITE AND QUARTZ AND SHOWS SOME BOXWORK STRUCTURES.

Comment (Workings): INCLINED SHAFT TRENDING N75W-N82E, CAVED IN 1983. SEVERAL OLD STRUCTURES ON PROPERTY; MODERATE DUMP, BUT NOT AS LARGE AS THOSE OF THE COMET AND PANAMERICAN MINES.

Comment (Geology): MUDDY BROWN MICACEOUS SILTSTONES AND SHALES OVERLIE THE LIMESTONE LOCALLY. THESE ROCKS SHOW SOME FE-MN VEINING AND BLEACHING EFFECTS. LIMESTONE STRIKING N-S, DIP 8-15E.

References

Reference (Deposit): TSCHANTZ CM & PAMPEYAN EH, 1970, GEOLOGY & MINERAL DEPOSITS OF LINCOLN CO., NEV BUR MINES BULL 73

Reference (Deposit): BENTZ, J. AND SMITH, P., 1983, FIELD EXAMINATION REPORT, AUG 27, 1983.

Reference (Deposit): FITCH, D. C., 1964, GEOLOGY AND ORE DEPOSITS OF THE COMET DISTRICT, LINCOLN CO., NEVADA; UNIV OF NEW MEXICO MS THESIS, P. 77-78, FIG. 21.

Reference (Deposit): USAEC PRELIM RECONN REPT 3653.

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.