Richmond Mine

The Richmond Mine is a tungsten mine located in Humboldt county, Nevada at an elevation of 6,601 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: Richmond Mine
Secondary: Louisa Patent
Secondary: NBMG Sample Site 2617

Commodity

Primary: Tungsten
Secondary: Silver
Tertiary: Lead
Tertiary: Iron
Tertiary: Zinc
Tertiary: Copper
Tertiary: Molybdenum

Location

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

Land Status

Land ownership: Private
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: Union Carbide

Owner Name: Union Carbide
Years: 1984 -

Production

Year: 1943
Time Period: 1942-1943
Material type: ORE
Description: Cp_Grade: ^Ave. 0.5% Wo3

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Contact Metamorphic
Operation Type: Unknown
Year First Production: 1942
Year Last Production: 1954
Discovery Year: 1874
Years of Production:
Organization:
Significant: N
Deposit Size: S

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

Structure

Not available

Alterations

Not available

Rocks

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

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

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

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

Analytical Data

Analytical Data: 0.2% TO 0.5% WO3 UP TO 1 TO 8% WO3. SAMPLE 2617 OF GARNET-DIOPSIDE-QUARTZ SKARN WITH MINOR SCHEELITE AND CLOTS OF PYRITE, CONTAINS 20 % FE, 3 % MG, -0.15 % TI, +5000 PPM MN, 30 PPM AG, 20 PPM B, 500 PPM BA, 2 PP-M BE, 300 PPM BI, 10 PPM CO, 10 PPM CR, 500 PPM CU, 100 PPM MO-, 15 PPM NI, 1000 PPM PB, 70 PPM SN, 150 PPM SR, 500 PPM V, 50-0 PPM W, 10 PPM Y, 1000 PPM ZN.

Materials

Ore: Scheelite
Ore: Pyrite
Ore: Galena
Ore: Chalcopyrite
Ore: Sphalerite
Gangue: Calcite
Gangue: Quartz
Gangue: Epidote
Gangue: Garnet

Comments

Comment (Deposit): THE DEPOSIT IS AT THE NW END OF THE N LOBE OF THE OSGOOD GRANODIORITE, WHERE GRANODIORITE CUTS ACROSS LIMESTONE BE-DS WITH AN OUTCROP WIDTH OF 900 FT. THE LIMESTONE IS BORDERED -BY MUCH THICKER UNITS OF ARGILLITE AND SOME OF THE BEDS WITHIN- THE LIMESTONE ARE ARGILLACEOUS. TACTITE BODY FORMS AN EXTENSI-VE OUTCROP. BEDS ARE SOMEWHAT CONTORTED NEAR THE ALMOST VERTIC-AL GRANODIORITE CONTACT. TACTITE OCCURS ALONG THE CONTACT IN T-WO BODIES, ONE ON EACH SIDE OF A SMALL ALLUVIATED GULCH. THE T-WO BODIES MAY BE CONNECTED BENEATH THE VALLEY BOTTOM. THE ORIG-INAL (LOUISA) DISCOVERY CONSISTS OF A SECTION OF TACTITE WHICH- CONTAINS BASE METAL SULFIDES, VUGS WITH LARGE EUHEDRAL QUARTZ- CRYSTALS. RICHMOND MINE TACTITE IS CHARACTERIZED BY A LARGE A-MOUNT OF QUARTZ, ASSOCIATED WITH EPIDOTE AND GARNET AND AS LAR-GE CRYSTALS (UP TO ONE FOOT LONG) IN VUGS AT THE CONTACT. SOME- OF THE SCHEELITE IS REPORTED TO CONTAIN APPRECIABLE AMOUNTS O-F LEAD TUNGSTATE IN ISOMORPHOUS COMBINATION WITH SCHEELITE. TH-E

Comment (Deposit): EAST TACTITE BODY, 210 FT BY 35 FT WIDE AT SURFACE SUPPLIED -MOST OF THE ORE MINED FROM THE PROPERTY. THE WEST TACTITE BODY- IS LARGER BUT THE TUNGSTEN CONTENT IS LOWER AND MORE ERRATIC -THAN THE EAST. THREE SMALL AREAS OF TACTITE THAT APPROACHED OR-E GRADE WERE FOUND BY SURFACE SAMPLING, BUT NO LARGE ORE BLOCK-S THAT COULD BE MINED ECONOMICALLY WERE INDICATED. ORE MINED F-ROM THIS OREBODY IN 1954 AVERAGED ONLY ABOUT 0.2 % WO3.

Comment (Location): SW 1/4 SEC. 31

Comment (Development): FIRST MINERAL DISCOVERY IN THE OSGOOD RANGE WAS MADE ON THE WESTERN PART OF THE RICHMOND SKARN IN 1874. THE DISTRI-CT WAS FIRST NAMED CRYSTAL AND THE ORIGINAL CLAIM WAS THE LOUI-SA. FIRST WORK WAS FOR SILVER IN EARLY 1900'S; LATER BECAME TH-E MOST IMPORTANT TUNGSTEN PRODUCER ON THE WEST SIDE OF THE OSG-OOD STOCK. IN 1942-43, THE PROPERTY WAS LEASED TO W. C. RIGG, -WHO MINED ABOUT 31500 TONS OF ORE FROM OPEN PITS AND UNDERGROU-ND WORKINGS, WHICH WAS TRUCKED TO THE GETCHELL MILL. IN 1954, -THE PROPERTY WAS LEASED TO JOHN ETCHART, JR., WHO MINED AN ADD-ITIONAL 2800 TONS OF LOW-GRADE ORE FROM AN OPEN PIT ON THE WES-T TACTITE BODY. LOTS OF DRILLING DONE- LATE 1950'S- EARLY 1960-'S

Comment (Deposit): OPERATED AS A SILVER PROPERTY IN THE EARLY DAYS. MORE THAN 31,500 TONS TACTITE ORE WERE MINED BY OPEN PIT AND UNDERGROUND METHODS FROM 1942-1943. WEST TACTITE OREBODY WAS MINED BY OPEN PIT IN 1954. THE SILVER ORE WAS MINED FROM UNDERGROUND WORKINGS EXISTED IN 1917 WHEN THE PROPERTY WAS ABANDONED DUE TO A LACK OF ORE IN A TUNNEL DRIVEN TO INTERSECT THE IGNEOUS CONTACT. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV

Comment (Geology): TACTITE BODIES ARE TABULAR, PARALLELLING THE GRANODIORITE CONTACT, AND MOSTLY PERPENDICULAR TO THE BEDDING OF THE LIMESTONE. QUARTZ CARRYING SOME ARGENTIFEROUS GALENA AND CONSIDERABLE SCHEELITE OCCURRING ON THE LIMESTONE SIDE OF THE GRANODIORITE CONTACT.

Comment (Workings): OPEN PIT ON EAST OREBODY; AT ALTITUDE OF 120 FT BELOW THE FLOOR OF THIS PIT, A 350-FT CROSSCUT ADIT WAS DRIVEN TO -THE CONTACT AND A DRIFT WAS DRIVEN 225 FT NE ALONG THE CONTACT-. A SHORT SUBLEVEL, REACHED BY A VERTICAL RAISE FROM THE ADIT,- WAS DRIVEN AT AN ALTITUDE 65 FT ABOVE THE ADIT, AND ORE WAS S-TOPED ABOVE. THE WEST TACTITE BODY WAS PROSPECTED BY 3 SHORT A-DITS, NUMEROUS TRENCHES AND AN OPEN PIT.

References

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

Reference (Deposit): NBMG MINING DISTRICT FILE 136, ITEM 25, 1963, USBM UNPUBLISHED DATA.

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

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

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

Reference (Deposit): HOBBS, S.W. AND CLABAUTH, S.E., 1946, TUNGSTEN DEPOSITS OF THE OSGOOD RANGE, HUMBOLDT COUNTY, NEV. UNIV. NEV. BULL. VOL. 40, NO. 5; GEOL. & MIN. SER. NO. 44.

Reference (Deposit): HESS, F.L. AND LARSEN, E.S., 1921, CONTACT-METAMORPHIC TUNGSTEN DEPOSITS OF THE UNITED STATES: U.S.G.S. BULL. 725-D

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

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.