Union Mine

The Union Mine is a silver and gold mine located in Storey county, Nevada at an elevation of 5,961 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: Union Mine

Commodity

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

Location

State: Nevada
County: Storey
District: Comstock Lode

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: Underground

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1879
Discovery Year: 1879
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: M

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Great Basin
Physiographic Detail: Basin And Mountains

Mineral Deposit Model

Model Name: Epithermal vein, Comstock

Orebody

Form: TABULAR

Structure

Type: R
Description: Regional Dip To West And Northwest

Type: L
Description: Faults

Alterations

Alteration Type: L
Alteration Text: Oxidation, Propylitization, Pyritization

Rocks

Name: Andesite
Role: Host
Age Type: Associated Rock Unit
Age Young: Miocene

Name: Andesite
Role: Host
Age Type: Host Rock
Age Young: Miocene

Name: Andesite
Role: Host
Age Type: Host Rock Unit
Age Young: Miocene

Analytical Data

Not available

Materials

Ore: Argentite
Ore: Sphalerite
Ore: Galena
Ore: Pyrite
Ore: Chalcopyrite
Gangue: Quartz

Comments

Comment (Workings): SHAFT, DRIFTS

Comment (Deposit): THIS MINE PRODUCED CONSIDERABLE ORE FROM THE MAIN COMSTOCK VEIN AT THE 2100-FT LEVEL. AT THE 2500-FT LEVEL, SEGMENTS OF THE EAST VEIN WERE DISCOVERED; THERE SEGMENTS, CUT BY FAULTS, CONTAINED MINABLE ORE BODIES. ; INFO.SRC : 1 PUB LIT

Comment (Development): PRODUCED CONSIDERABLE ORE FROM THE MAIN COMSTOCK VEIN AT THE 2100 FT. LEVEL MINABLE ORE DISCOVERED AT 2500 FT. LEVEL FROM SEGMENTS OF THE EAST VEIN.

Comment (Deposit): VEIN, FAULT ZONE

References

Reference (Deposit): WPA STATE WRITER'S PROJECT, 1940-41, INDIVIDUAL HISTORIES OF THE MINES OF THE COMSTOCK; UNPUBLISHED OPEN-FILE REPORT; NEV. BUREAU OF MINES AND GEOL.

Reference (Production): STODDARD, C., AND CARPENTER, J.A., 1950

Reference (Deposit): STODDARD, CARL, AND CARPENTER, J.A., 1950, MINERAL RESOURCES OF STOREY AND LYON COUNTIES, NEVADA NBMG BULL 49

Reference (Deposit): BONHAM, H.F., 1969, GEOLOGY AND MINERAL DEPOSITS OF WASHOE AND STOREY COUNTIES, NEVADA: NBMG BULL 78

Reference (Deposit): BASTIN, E.S., 1922, BONANZA ORES OF THE COMSTOCK LODE, VIRGINIA CITY, NEV; USGS. BULL 735-C

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.