Oreana Mine

Site Name

Primary: Oreana Mine
Secondary: Little Tungsten Mine
Secondary: Marker George
Secondary: Jack of Clubs
Secondary: Gordon Mine
Secondary: NBMG Sample Site 2663 Merged Data From Record M234138 Which Had No
Secondary: Site Name

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Commodity

Primary: Tungsten
Secondary: Fluorine-Fluorite
Secondary: Antimony
Secondary: Beryllium

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Location

State: Nevada
County: Pershing
District: Rye Patch District

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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.

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Holdings

Not available

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Workings

Type: Surface/Underground

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Ownership

Not available

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Production

Not available

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Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1934
Years of Production:
Organization:
Significant: N
Deposit Size: S

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Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Great Basin
Physiographic Detail: Basin And Mountains

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Mineral Deposit Model

Not available

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Orebody

Form: TABULAR

Form: TABULAR

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Structure

Not available

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Alterations

Not available

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Rocks

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

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

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

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Analytical Data

Analytical Data: 0.1% BEO(ROYSE).SAMPLE 2663 OF ORTHOCLASE-QUARTZ-BERYL PEGMATITE WITH SOME SCHEELITE, CONTAINS 0.5% FE, 0.7% MG, 3% CA, 0.015% TI, 300 PPM MN, 1 PPM AG, 70 PPM BA, +1000 PPM BE, 15 PPM BI, 30 PPM CR, 10 PP, CU, 30 PPM NI, 20 PPM PB, 100 PPM SC, 150 PPM SR, 500 PPM V, 50 PPM W, 10 PPM Y, 10 PPM ZR.

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Materials

Ore: Beryl
Ore: Fluorite
Ore: Scheelite
Gangue: Phlogopite
Gangue: Oligoclase
Gangue: Quartz
Gangue: Albite

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Comments

Comment (Deposit): SCHEELITE OCCURS IN NARROW PEGMATITE DIKES AND IN IRREGULAR PEGMATITE PODS IN THE METADIORITE WHICH CUTS LIMESTONE. TWO MAJOR STEEPLY-DIPPING OR VERTICAL PEGMATITE DIKES AND MANY MINOR ONES CUT THROUGH THE METADIORITE AND ASSOCIATED APLITE DIKES, BUT THEY DIE OUT IN THE LIMESTONE THAT LIES ABOVE AND BELOW THE METADIORITE. SCHEELITE IN THESE DIKES OCCURS ONLY NEAR THE LOWER CONTACT BETWEEN LIMESTONE AND METADIORITE AND EXTENDS UPWARD ABOUT 50 FT FROM THIS CONTACT. IT ALSO OCCURS IN SEVERAL LENTICULAR PEGMATITE PODS ALONG THE LOWER CONTACT. THE PEGMATITE DIKES RANGE IN THICKNESS FROM A FEW INCHES TO 5 FT AND CONSIST DOMINANTLY OF QUARTZ, FLUORITE, OLIGOCLASE, ALBITE, BERYL, SCHEELITE AND PHLOGOPITE. THESE MINERALS ARE DISTRIBUTED ERRATICALLY THROUGH THE PEGMATITES PORTIONS OF WHICH WERE NEARLY SOLID SCHEELITE, FLUORITE, OR QUARTZ. IN THE EASTERN ONE OF THE TWO DIKES, AT THE ORIGINAL DISCOVERY SITE WHERE THE ORE CROPPED OUT, A BODY 100 FT LONG YIELDED HIGH-GRADE SCHEELITE ORE THAT

Comment (Location): UTM FROM NBMG BULL.105 . INFO FROM LAND.ST :(1972)

Comment (Development): DEPOSIT WAS MINED CONTINUOUSLY FROM 1935 TO 1943 BY THE RARE METALS CORP

Comment (Deposit): WAS HAND-SORTED AND SHIPPED WITHOUT FURTHER CONCENTRATION. BERYL WAS A COMMON CONSTITUENT OF ORE MINED FROM THE VERTICAL DIKES BUT WAS LESS ABUNDANT IN THE LENSES OF PEGMATITE ALONG THE CONTACT. THE BERYL CRYSTALS, PALE GREEN IN COLOR, WERE GENERALLY SMALL BUT RANGED FROM MICROSCOPIC SIZE TO CRYSTALS ALMOST 1 INCH THICK AND 4 INCHES LONG. THE QUANTITY OF BERYL PRESENT WAS NOT SUFFICIENT TO CONSTITUTE BERYLLIUM ORE, AND THE MILL TAILINGS FROM THE TUNGSTEN ORE TREATED AT THE TOULON MILL CONTAINED ONLY ABOUT 0.1% BEO. MOST OF THE ORE MINED WAS FROM THE WEST DIKE, MINED FOR A STRIKE LENGTH OF 1120 FT, ALTHOUGH 4 DIKES IN ALL WERE MINED. ONLY THE TWO MAJOR DIKES PLUS NUMEROUS LENSES ALONG THE CONTACT CONTAINED SUBSTANTIAL ORE BODIES. AT THE NORTH END OF THE MINE AREA, ON THE MARKER GEORGE PATENTED CLAIM, SCHEELITE OCCURS SPORADICALLY AS RICH STREAKS IN 5 PEGMATITE DIKES 0.5-10 IN THICK (AVG. 4 IN.) THE DIKES USUALLY CONSIST OF QUARTZ AND FELDSPAR OR OF QUARTZ ALONE, BUT LOCALLY THEY

Comment (Deposit): CONTAIN SCHEELITE, BLUE BERYL, OR BLACK TOURMALINE. ALTHOUGH THE ENTIRE WIDTH OF A DIKE MAY BE SCHEELITE, THE STREAKS DO NOT EXTEND MORE THAN A FEW FEET IN ANY DIRECTION. THE WALLROCKS ARE INTERBEDDED LIMESTONE AND HORNFELS THAT STRIKE NW AND DIP 20-45 NE. THE DIKES ALSO STRIKE NW, BUT DIP 60-80 NE AND CUT ACROSS THE BEDS. THE BEST SCHEELITE MINERALIZATION APPEARS TO BE WHERE THE DIKES CROSS THE CONTACT BETWEEN HORNFELS AND LIMESTONE. ONLY ABOUT 150 UNITS OF W03 WERE PRODUCED FROM THESE SMALL DIKES THAT WERE EXPLORED BY NUMEROUS TRENCHES AND ABOUT 1200 FT OF ADITS AND RAISES. NATIVE ANTIMONY IS RARE BUT OCCURS AS SMALL IRREGULAR PODS AND CRYSTALS ON QUARTZ AND FELDSPAR.

Comment (Workings): 8 ADITS CONNECTED BY RAISES AND WINZES; TRENCHES

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References

Reference (Deposit): STAGER, H.K., AND TINGLEY, J.V.,1988 TUNGSTEN DEPOSITS IN NEVADA: NBMG BULL. 105. PP.190-191.

Reference (Deposit): NBMG STAFF, 1985, NBMG OFR 85-3.

Reference (Deposit): KERR, P.F., 1938, TUNGSTEN MINERALIZATION AT OREANA, NEVADA; ECON GEOL, VOL. 33, P. 390-427.

Reference (Deposit): KERR, P.F., 1946, TUNGSTEN MINERALIZATION OF THE UNITED STATES; GSA MEMOIR 15.

Reference (Deposit): LAWRENCE, E.F., 1963, ANTIMONY DEPOSITS OF NEVADA; NBMG BULL. 61.

Reference (Deposit): JOHNSON, M.G., 1977, NBMG BULL 89.

Reference (Deposit): WARNER, ET AL., 1959, OCCURRENCE OF NONPEGMATITE BERYLLIUM IN THE UNITED STATES; USGS PP. 318.

Reference (Deposit): OLSON, J.C. AND HINRICHS, E.N., 1960, USGS BULL 1082-D, P. 135.

Reference (Deposit): PAPKE, K.G., 1979, NBMG BULL 93, P. 72.

Reference (Production): STAGER,H.K. AND TINGLEY, J.V.,1988 TUNGSTEN DEPOSITS IN NEVADA; NBMG BULL. 105 PP. 190-191

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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.