NBMG Sample Site 2611

The NBMG Sample Site 2611 is a tungsten mine located in Humboldt county, Nevada at an elevation of 5,699 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 2611

Commodity

Primary: Tungsten
Secondary: Silver
Tertiary: Molybdenum

Location

State: Nevada
County: Humboldt
District: Potosi District; Getchell 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

Type: Surface/Underground

Ownership

Owner Name: Frm Corp
Years: 1984 -

Owner Name: Getchell Mine. Inc.

Production

Year: 1957
Time Period: 1951-1957
Material type: ORE
Description: Cp_Grade: ^Ave. 0.37, Wo3

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Contact Metamorphic
Operation Type: Unknown
Year First Production: 1951
Discovery Year: 1917
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: W skarn

Orebody

Form: TABULAR, ALONG IGNEOUS CONTACT

Structure

Type: R
Description: Reg.Struct: Getchell Fault System

Type: L
Description: Fault Along Range-Front; Ne-Trending Offset Fault

Alterations

Alteration Type: L
Alteration Text: Silicification, Bleaching

Rocks

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

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

Analytical Data

Analytical Data: SAMPLE 2611, A DUMP SAMPLE OF GARNET-EPIDOTE-DIOPSIDE-QUARTZ SKARN WITH TRACE SCHEELITE, MOLYBDENITE, CHALCOPYRITE-, PYRITE, CONTAINS 20 % FE, 1 % MG, 20 % CA, 0.1 % TI, +5000 P-PM MN, 30 PPM AG, 100 PPM B, 2 PPM BE, 70 PPM BI, 50 PPM CO, 1-000 PPM CU, 300 PPM MO, 10 PPM NI, 1000 PPM PB, 30 PPM SN, 500- PPM V, 300 PPM W, 30 PPM Y, 500 PPM ZN, 15 PPM ZR.

Materials

Ore: Scheelite
Ore: Pyrite
Ore: Chalcopyrite
Ore: Sphalerite
Ore: Galena
Ore: Pyrrhotite
Gangue: Garnet
Gangue: Wollastonite
Gangue: Pyroxene

Comments

Comment (Deposit): ONE OF THE EARLIEST TUNGSTEN PROPERTIES DEVELOPED IN THE AREA WAS RILEY. GETCHELL MINE INC.'S UNDERGROUND MINING, HERE AT RILEY EXTENSION BEGAN IN 1951; OPEN PIT ON WEST OREBODY LATER. 3 TACTITE BODIES. THE EASTERN MOST OF WHICH IS THE NORTHWARD CONTINUATION OF THE RILEY MINE OREBODY. RILEY AND RILEY EXTENSION MINES COMPRISE THE LARGEST SINGLE TACTITE DEPOSIT IN THE DISTRICT. RECENT EXPLORATION (GEOLOGIC MAPPING AND DRILLING) DEFINES AREAS CONTAINING APPROXIMATELY 186,000 TONS OF TUNGSTEN ORE IN THE RILEY EXTENSION AREA. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV

Comment (Reserve-Resource): BETWEEN THE 400 AND 800 LEVELS OF THE MINE.

Comment (Location): S 1/2 OF S 1/2 SEC. 4; S. OF HANSEN CANYON.

Comment (Production): 229,000 TONS ORE AVG. 0.37% WO3, PLUS UNMINED RESERVES OF APPROX. 41,700 TONS OF 0.4, WO3 ORE BETWEEN 400 AND 800 LEVELS.

Comment (Development): RECENT WORK DEFINES 186,000 TONS ORE IN THIS AREA

Comment (Workings): VERTICAL SHAFT 400 FT DEEP, INCLINED WINZE FROM 400 TO 800 LEVEL, OPEN PIT, REMAINS OF STEEL HEADFRAME. SHAFT FLOO-DED TO ABOUT 200 FT LEVEL, (1984).

Comment (Geology): 3 TACTITE ZONES; THE EAST VEIN "EXTENDS ALONG THE GRANODIORITE CONTACT FOR ABOUT 1600 FT, MINED ON BOTH RILEY AND RILEY EXTENSION PROPERTIES. THE MAIN OREBODY WAS A TABULAR MASS OF TACTITE MINED FOR APPROX. 800 FT. DOWN DIP, AVERAGING 10 FT. THICK. PREBLE FORMATION LIMESTONE LENSES IN HORNFELS; MOST IMPORTANT IS THE 200-FT THICK RILEY LIMESTONE, THIN-BEDDED, WITH SHALEY PARTINGS.

Comment (Deposit): LARGEST OF THE 3 TACTITE ORE ZONES IS THE EASTERN ONE, A CONTINUATION OF THE RILEY TACTITE. THE MIDDLE AND WESTERN- ZONES ARE THINNER TACTITE BANDS FORMED IN LIMESTONE UNITS WHI-CH LIE DOWN-SECTION (WEST) OF THE RILEY LIMESTONE. THE MIDDLE -OREBODY WAS DISCOVERED UNDERGROUND AND DOES NOT CROP OUT AT TH-E SURFACE. THE WESTERN OREBODY WAS MINED FROM THE SURFACE. THE- LIMESTONES DIP 40-50E AND THE GRANODIORITE CONTACT IS GENERAL-LY CONFORMABLE TO THE STRIKE AND DIP OF THE SEDIMENTS. PRE-INT-RUSIVE FOLDING OF THE LIMESTONE INTO GENTLE, ASYMMETRICAL FOLD-S HAS RESULTED IN A "SCALLOPED" CONTACT CONFIGURATION, AND THE- RICHEST ORE HAS FORMED WHERE SYNCLINAL TROUGHS INTERSECT THE -CONTACT FORMING EMBAYMENTS SHAPED LIKE CONE SEGMENTS. TO THE E-AST, DOWN DIP, THE CONTACT STEEPENS AND PASSES INTO HORNFELS W-HICH LIES BELOW THE LIMESTONE, LIMITING THE EXTENT OF THE TACT-ITE TO THE EAST.

References

Reference (Deposit): WILLDEN,R., 1964, GEOLOGY AND MINERAL DEPOSITS OF HUMBOLDT CO., NEV: NEV. BUREAU OF MINES BULL. 59.

Reference (Deposit): HOTZ, P.E. AND WILLDEN, R., 1964, GEOLOGY AND MINERAL DEPOSITS OF THE OSGOOD MOUNTAINS QUAD. HUMBOLDT CO., NEV: U.S.G.S. PROF. PAPER 431.

Reference (Deposit): TINGLEY, J.V., 1978, UNPUBLISHED REPORT ON THE GETCHELL TUNGSTEN PROJECT, ON FILE AT THE NEV. BUREAU OF MINES

Reference (Deposit): STAGER, H. K., IN PREPARATION, NBMG BULLETIN ON TUNGSTEN DEPOSITS OF NEVADA.

Reference (Deposit): TINGLEY, J. V., NBMG FIELD EXAMINATION AND SAMPLE ANALYSIS, 6 SEP 84.

Reference (Deposit): SCHILLING, JOHN, 1979, NBMG OFR 79-3, MOLYBDENUM RESOURCES OF NEVADA.

Reference (Production): HOTZ, P.E. AND WILLDEN, R., 1964

Reference (Reserve-Resource): STAGER, IN PREP

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.