Mary Clough Mine

The Mary Clough Mine is a tungsten, gold, and silver mine located in Humboldt county, Nevada at an elevation of 7,251 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: Mary Clough Mine
Secondary: Charlestown Hill National Mines
Secondary: NBMG Sample Site 2384
Secondary: Magnussen Property

Commodity

Primary: Tungsten
Primary: Gold
Primary: Silver

Location

State: Nevada
County: Humboldt
District: Shon District; Paradise Valley District; Mount Rose District; Charleston Hill 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: Charlestown Hill National Mines, Inc.
Years: 1916 -

Production

Year: 1955
Time Period: 1955

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1915
Discovery Year: 1916
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Model Name: Polymetallic veins

Orebody

Form: VEIN, IRREGULAR

Structure

Not available

Alterations

Not available

Rocks

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Analytical Data

Analytical Data: SAMPLE 2384 OF QUARTZ VEIN MATERIAL CONTAINS 3 % FE, 0.2 % MG, 0.3 % CA, 0.15 % TI, 300 PPM MN, 10 PPM AG, 200 PPM AS, 100 PPM B, 500 PPM BA, 2 PPM BE, 50 PPM BI, 300 PPM CD, 5 PPM CO, 50 PPM CR, 30 PPM CU, 20 PPM LA, 30 PPM NI, 1500 PPM PB, 5 PPM SC, 70 PPM V, 100 PPM W, 20 PPM Y, 1500 PPM ZN, AND 7 PPM ZR.

Materials

Ore: Gold
Ore: Chalcopyrite
Ore: Scheelite
Ore: Silver
Unknown: Pyrite

Comments

Comment (Development): PROPERTY WAS LOCATED IN 1919 BY MR. AND MRS. CLOUGH. A CAMP AND MILL WERE BUILT AND A 1200-FT ADIT WAS DRIVEN TO EXPLORE FOR GOLD AND SILVER. TUNGSTEN MINERALIZATION WAS DISCOVERED IN 1943, BUT NO PRODUCTION WAS RECORDED UNTIL 1955 WHEN THE RED ROSE MINING AND MILLING CO. SHIPPED 7 TONS OF ORE THAT YIELDED 2 UNITS WO3. NO ACTIVITY AT TIME OF EXAMINATION IN 1985.

Comment (Deposit): HORNFELS, SHALE, AND SCHIST ARE CUT BY A LARGE STEPPLY-DIPPING GRANODIORITE DIKE 250 FT WIDE AND A SMALLER APLITE DIKE. ALL ROCK TYPES ARE CUT BY QUARTZ VEINS AND VEINLETS UP TO 2 FT WIDE. LARGER VEINS CONTAIN GOLD, SILVER, CHALCOPYRITE, AND PYRITE, BUT NO SCHEELITE. THE SCHEELITE OCCURS IN NARROW VEINLETS LESS THAN AN INCH WIDE. SOME VEINLETS 0.25-0.5 INCH WIDE ARE NEARLY HALF SCHEELITE, AND HIGHEST GRADE IS AT VEIN INTERSECTIONS. IN ONE PLACE 350 FT FROM THE PORTAL OF THE ADIT, SEVERAL VEINLETS INTERSECT TO GIVE A GRADE OF ABOUT 1 % WO3 OVER A 2 FT WIDTH. AVEREAGE GRADE OF THE 7 TONS OF ORE MINED IN 1955 WAS LESS THAN 0.4 % WO3.

Comment (Geology): GEOL.COM: PYRITE AND OTHER SULFIDES ARE DISSEMINATED THROUGH THE SEDIMENTS, HIGHEST GRADE SCHEELITE AT SEAM INTERSECTIONS VEIN WIDTH IS 2 FEET. GANGUE IS HARD, WHITE QUARTZ WITH DISSEMINANTED CHALCOPYRITE, AND SMALL VALUES IN GOLD AND SILVER. GEOL.COM: PYRITE AND OTHER SULFIDES ARE DISSEMINATED THROUGH THE SEDIMENTS, HIGHEST GRADE SCHEELITE AT SEAM INTERSECTIONS VEIN WIDTH IS 2 FEET. GANGUE IS HARD, WHITE QUARTZ WITH DISSEMINANTED CHALCOPYRITE, AND SMALL VALUES IN GOLD AND SILVER. HORNFELS, SHALE, SCHIST OF WINNEMUCCA AND O'NEILL FORMATIONS STRIKING N30E, DIP MODERATE TO NW..

Comment (Deposit): THE CHARLESTOWN HILL NATIONAL MINES INC CONSISTED OF A GROUP OF 11 CLAIMS OWNED BY THIS MONTANA CORPORATION FORMED IN 1916. A SMALL PRODUCTION WAS MADE BY LESSEES IN ITS EARLY YEARS. THE PROPERTY WAS INACTIVE FROM 1929 UNTIL VANDERBURG'S REPORT IN 1938. DEVELOPMENT THEN CONSISTED OF SEVERAL ADITS AND OTHER WORKINGS TOTALLING ABOUT 2000 FEET ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV

Comment (Workings): FIVE TUNNELS OR ADITS AND MUCH TRENCHING AND PROSPECTING. PARTS OF MILL WERE STILL STANDING IN 1985.

Comment (Location): 7 MI. N.E. OF PARADISE STATION

Comment (Production): SMALL AMOUNTS OF AU-AG PRODUCTION IN EARLY YEARS.

References

Reference (Deposit): WILLDEN, R., 1964, GEOLOGY AND MINERAL DEPOSITS OF HUMBOLDT COUNTY, NEVADA: NBMG, BULL. 59.

Reference (Deposit): VANDERBURG, W.O., 1938, RECONNAISSANCE OF MINING DISTRICTS IN HUMBOLDT COUNTY, NEVADA: USBM INF. CIRC. 6995.

Reference (Deposit): STAGER, JACK, 11 JUNE 85, NBMG FIELD EXAMINATION REPORT AND SAMPLE ANALYSIS.

Reference (Deposit): TINGLEY, J.V., 1972, UNPUBLISHED REPORT ON THE MARY CLAUGH MINE.

Reference (Production): STAGER, H.K., (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.