Arcturus Mine

The Arcturus Mine is a tungsten mine located in Pershing county, Nevada at an elevation of 4,390 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: Arcturus Mine
Secondary: Arcturus
Secondary: NBMG Sample Site 2926

Commodity

Primary: Tungsten
Tertiary: Molybdenum
Tertiary: Manganese

Location

State: Nevada
County: Pershing
District: Trego Mining Area

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

Type: Surface/Underground

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1941
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Model Name: W skarn

Orebody

Form: LENTICULAR

Structure

Not available

Alterations

Not available

Rocks

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Permian

Analytical Data

Analytical Data: SAMPLE 2926 FROM CONTACT ZONE AND DUMP CONTAINS 7 % FE, 1.5 % MG, 10 % CA, 0.15 % TI, 3000 PPM MN, 200 PPM B, 20 PPM CO, 20 PPM CR, 7 PPM CU, 50 PPM MO, 7 PPM NI, 20 PPM PB, 5 PPM SC, 100 PPM V, 700 PPM W 10 PPM Y, 500 PPM ZN, AND 20 PPM ZR.

Materials

Ore: Powellite
Ore: Scheelite
Gangue: Diopside
Gangue: Quartz
Gangue: Hedenbergite
Gangue: Epidote
Gangue: Garnet

Comments

Comment (Commodity): 2926 WAS COLLECTED FROM THE CONTACT ZONE AND THE DUMP. THE SAMPLE LAMPED WELL WITH GOOD HIGH GRADE TUNGSTEN AND SOME POWELLITE. THE PROBLEM WITH THIS MINE WOULD BE IN DEVELOPING SUFFICIENT ORE RESERVES FOR ALTHOUGH IT APPEARS TO BE HIGH IN GRADE, THE TACTITE ZONE IS VERY NARROW.

Comment (Location): ACCESSIBLE BY GOOD ROAD TO WITHIN 0.3 MILE, THEN STEEP. ON STEEP N SIDE OF SELENITE RANGE. ; INFO FROM LAND.ST :(1972)

Comment (Development): APPEARS TO HAVE BEEN WORKED IN ABOUT THE 1950'S. NO ACTIVITY AT TIME OF EXAMINATION IN 1985.

Comment (Deposit): NARROW BAND OF METASEDIMENTS IN CONTACT WITH GRANODIORITE. METASEDIMENTS HAVE SURVIVED EROSION IN PART BECAUSE THEY HAVE BEEN SILICIFIED, FORMING A THIN SELVAGE OF TACTITE. SCHEELITE-BEARING TACTITE IS EXPOSED AT THE SURFACE IN A LENS 50 FT LONG, 4-5 FT WIDE. THE ORE IS COARSE-GRAINED AND CONSISTS OF GARNET, EPIDOTE, QUARTZ, AND SCHEELITE, WITH AN AVERAGE CONTENT OF 1.0 % WO3. SURROUNDING THE ORE AND CONTINUING ALONG STRIKE FOR SEVERAL HUNDRED FEET IS BARREN TACTITE COMPOSED OF GARNET, HEDENBERGITE, QUARTZ, AND CALCITE. THE TACTITE IS INTERBEDDED WITH CALC-SILICATE HORNFELS, BIOTITE SCHIST, AND METAMORPHOSED VOLCANIC ROCKS, ALL OF WHICH DIP GENTLY SOUTHEAST INTO A LARGE GRANITE MASS THAT CONSTITUTES MOST OF THE RANGE. THE CONTACT BETWEEN GRANITE AND METAMORPHIC ROCKS IS STEEP, AND THE ORE-BEARING TACTITE IS PROBABLY CUT OFF BY GRANITE ABOUT 200 FT DOWN DIP. AT NE END OF PROPERTY, TACTITE OCCURS IN A BODY 200 FT LONG, 20 FT WIDE, OF GARNET, DIOPSIDE, AND SCHEELITE. HIGHEST

Comment (Deposit): GRADE PARTS ARE 2-3 FT WIDE, CONTAINING 0.2-0.4 % WO3.

Comment (Workings): CROSSCUT ADIT 440 FT LONG THAT IS 200 FT BELOW THE ORE BODY AND DOES NOT INTERSECT IT; DOZER CUT.

References

Reference (Deposit): QUADE, JACK, 5 JUN 85, NBMG FIELD EXAMINATION REPORT AND SAMPLE ANALYSIS.

Reference (Deposit): NBMG STAFF, 1985, NBMG OFR 85-3.

Reference (Deposit): JOHNSON, M. G., 1977, NBMG BULL 89, PL. I.

Reference (Deposit): LEMMON, D. M., TWETO, O. C., 1962, USGS MR-25, P. 14. #5. STAGER, H. K. AND TINGLEY, J. V., IN PREPARATION, NBMG BULLETIN ON TUNGSTEN DEPOSITS OF NEVADA .

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.