NBMG Sample Site 2628

The NBMG Sample Site 2628 is a gold mine located in Humboldt county, Nevada at an elevation of 4,642 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: NBMG Sample Site 2628

Commodity

Primary: Gold
Secondary: Silver
Secondary: Lead
Tertiary: Arsenic

Location

State: Nevada
County: Humboldt
District: Mill City District; Central 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

Not available

Production

Not available

Deposit

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

Physiography

Not available

Mineral Deposit Model

Model Name: Low-sulfide Au-quartz vein

Orebody

Form: TABULAR

Form: TABULAR

Structure

Not available

Alterations

Not available

Rocks

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

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

Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Jurassic

Analytical Data

Analytical Data: SAMPLE 2628 OF THE WEST VEIN CONTAINS 3% FE, 0.02% MG, 0.3% CA, .005% TI, 20 PPM MN, 70 PPM AG, 5000 PPM AS, 30 PPM B, 50 PPM BI, 200 PPM CU, 15 PPM NI, 15000 PPM PB, 20 PPM V, 300 PPM ZN. AA ANALYSIS OF SAMPLES SHOWS 1.7 PPM AU, ALSO.

Materials

Ore: Gold
Gangue: Quartz
Gangue: Hematite
Gangue: Calcite

Comments

Comment (Deposit): WHITE QUARTZ VEIN ALONG SHEAR ZONE CONTAINS RED HEMATITE STAINING ON FRACTURES, PARK RED HEMATITE BANDING ON BOTH WALLS, HAS 0.5-1FT FAULT GOUGE ON WALLS. VEIN IS BRECCIATED AND CEMENTED WITH FE OXIDE SILICA. VEIN PINCHES AND SWELLS ALONG STRIKE AND DIP. THE UPPER (SOUTH) WORKINGS EXPOSE A DIORITE (TO EAST) CONTACT ZONE WITH VEIN QUARTZ ALONG THE CONTACT. VEIN-DIKE CONTACT HERE STRIKES N 40-45 E. DIKE IS A FINE-GRAINED GRANODIORITE COMPOSED OF BIOTITE (MODERATELY CHLORITIZED), QUARTZ, FELDSPAR, SOME FE OXIDE POINTS (AFTER PYRITE). INTRUSIVE BODY EXTENDS TO THE EAST AND IS CUT BY A QUARTZ-CALCITE VEIN IN WORKINGS THERE. THE VEIN IS HEMATITE-STAINED, CRUSHED QUARTZ VEIN WITH DOG-TOOTH SPAR ON WALLS; N 30 E STRIKE, 70 NE DIP TO VEIN.

Comment (Workings): ADITS, SMALL STOPES ALONG VEIN

Comment (Geology): THE INTRUSIVE BODY, NOT SHOWN ON THE COUNTY GEOLOGIC MAP, MAY EXTEND EAST 1000 FT OR MORE, MAY CONNECT WITH INTRUSIVE AT SAMPLE SITE 2627, PROBABLY A SMALL PLUG RATHER THAN A DIKE.

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

References

Reference (Deposit): TINGLEY, J.V., 1984, NBMG FIELD EXAMINATION, 9/20/84

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.