Bullion-Monarch Open Pit Mine

The Bullion-Monarch Open Pit Mine is a silver and gold mine located in Eureka county, Nevada at an elevation of 5,928 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: Bullion-Monarch Open Pit Mine
Secondary: NBMG Sample Site 132

Commodity

Primary: Silver
Primary: Gold

Location

State: Nevada
County: Eureka
District: Lynn District

Land Status

Land ownership: BLM Administrative Area
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

Not available

Ownership

Owner Name: Universal Gas, Inc. (Montana)
Home Office: 1070 Silver St, Elko, Nv 89801
Years: 1982 -

Production

Not available

Deposit

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

Physiography

Not available

Mineral Deposit Model

Model Name: Carbonate-hosted Au-Ag

Orebody

Not available

Structure

Type: R
Description: Lynn Window Of Roberts Mountain Thrust

Type: L
Description: Sheep Creek Fault

Alterations

Alteration Type: L
Alteration Text: Silicification

Rocks

Name: Volcanic Rock (Aphanitic)
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Name: Volcanic Rock (Aphanitic)
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Devonian

Name: Volcanic Rock (Aphanitic)
Role: Associated
Age Type: Host Rock
Age Young: Late Devonian

Analytical Data

Analytical Data: SAMPLE 132 FROM N END OF PIT ALONG UNMINERALIZED NSOW STRUCTURE (ALTERED) CONTAINS 5% FE, 0.5% MG, 1% CA, 0.3% TI, 300 PPM MN, 1.5 PPM AG, 1500 PPM AS, 300 PPM B, 700 PPM BA, 1 PPM BE, 10 PPM CO, 200 PPM CR, 100 PPM CU, 50 PPM LA, 100 PPM NI, 70 PPM PB, 200 PPM SB, 10 PPM SC, 150 PPM SR, 300 PPM V. 30 PPM Y, 700 PPM ZN, 150 PPM ZR.

Materials

Ore: Gold
Gangue: Quartz

Comments

Comment (Development): ACTIVE STRIPPING OF WASTE ROCK (1982)

Comment (Location): INFO FROM LAND.ST :(1972)

Comment (Reserve-Resource): ORE IS HIGHER GRADE THAN AT CARLIN WITH AVERAGE GRADE FROM 0.22 TO 1.65 OZ/TON, HIGHEST GRADES REACHING 7.8 OZ/TON.

Comment (Deposit): MOST OF THE GOLD OCCURS IN A ZONE AT THE BASE OF THE PIT WHERE 2 OR MORE N-TRENDING FAULTS INTERSECT. THIS ZONE CURVES TO THE WEST IN THE BASE OF THE PIT AND IS TRUNCATED AT ITS N END BY A CROSS-CUTTING STRUCTURE WHICH IS APPARENTLY UNMINERALIZED. DEPOSIT IS TIGHTLY STRUCTURALLY CONTROLLED. GOLD OCCURS IN THE FAULT GOUGE ASSOCIATED WITH MG, AS, AND SILICIFICATION AND JASPEROID DEVELOPMENT. MINERALIZING FLUIDS ARE THOUGHT TO BE POST-FAULTING, HAVING TRAVELED ALONG PRE-EXISTING FRACTURE SYSTEM.

Comment (Workings): OPEN PIT, ABOUT 200 FT DEEP

References

Reference (Deposit): USBM (WINNEMUCCA) MILS NO. 307, REFERENCE NO. 3201100214

Reference (Deposit): EVANS, J. G. (1972) GEOLOGICMAP OF RODEO CREEK NE QUADRANGLE, USGS MAP MF-325

Reference (Deposit): BENTZ, BROOKS AND MACFARLANE, 5-27-1982, NBMG FIELD EXAMINATION AND SAMPLE ANALYSIS.

Reference (Deposit): BONHAM, H.F., 1986, NBMG MAP 91.

Reference (Deposit): BONHAM, H.F., 1988, IN NBMG MI-1987.

Reference (Deposit): NBMG, 1994, MI-1993

Reference (Reserve-Resource): BONHAM, 1988. NBMG MI-1993

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.