NBMG Sample Site 2635

The NBMG Sample Site 2635 is a silver and gold mine located in Humboldt county, Nevada at an elevation of 4,888 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 2635

Commodity

Primary: Silver
Primary: Gold
Secondary: Copper
Secondary: Zinc
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: Occurrence
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

Structure

Type: L
Description: Fractures, Slickensides

Alterations

Alteration Type: L
Alteration Text: Kaolinization Of Wallrock Near Veins; Silication

Rocks

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

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

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

Analytical Data

Analytical Data: SAMPLE 2635 OF CRUSHED, RECEMENTED WHITE VEIN QUARTZ WITH GREEN ARSENATE (?) FRACTURE COATING CONTAINS 5% FE, .05% MG, 3% CA, 0.07% TI, 1000 PPM MN, 700 PPM AG, 5000 PPM AS, 150 PPM B, 50 PPM BA, 1 PPM BE, 500 PPM CD, 1500 PPM CU, 15 PPM MO, 10 PPM NI, 10000 PPM PB, 1000 PPM SB 20 PPM V, 10 PPM Y, 3000 PPM ZN, 50 PPM ZR. AA ANALYSIS ALSO SHOWS 0.5 PPM AU.

Materials

Ore: Gold
Gangue: Quartz
Gangue: Hematite

Comments

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

Comment (Development): INACTIVE IN 1984

Comment (Deposit): WORKINGS EXPLORE QUARTZ VEINS ALONG SHEAR ZONES IN DIORITE AND HORNFELS. EASTERN SHAFT IS IN DIORITE; WESTERN SHAFT HAS DIORITE ON EAST WALL, HORNFELS ON WEST. VEINS ARE MOSTLY WHITE QUARTZ, BUT ARE BRECCIATED AND RECEMENTED WITH QUARTZ AND HEMATITE. WALLROCK KAOLINIZED NEAR VEINS. CLOTS OF PALE GREEN CRYSTALLINE MINERAL (ARSENATE?) COAT FRACTURE SURFACES, SLICKENSIDES ON FAULT SURFACES.

Comment (Workings): 2 VERTICAL SHAFTS, CUTS

Comment (Geology): THE TOP OF THE SMALL HILL AT THE PROSPECT IS UNDERLAIN BY DIORITE, SILICATED ROCKS LIE BOTH EAST AND WEST OF THE DIORITE

References

Reference (Deposit): TINGLEY, J.V., 1984, NBMG FIELD EXAMINATION, 9/21/84

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.