Crosby Mine

Site Name

Primary: Crosby Mine
Secondary: NBMG Sample Sites 2888, 2889, 2892, 2893
Secondary: Digger Claims
Secondary: White Blow Out, White Caps
Secondary: White Cap
Secondary: Calalta
Secondary: Stoddard.

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Commodity

Primary: Tungsten
Tertiary: Molybdenum
Tertiary: Gold
Tertiary: Silver
Tertiary: Copper
Tertiary: Bismuth

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Location

State: Nevada
County: Washoe
District: Nightingale 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

Not available

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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
Deposit Type: Contact Metamorphic
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

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Physiography

Not available

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Mineral Deposit Model

Model Name: W skarn

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Orebody

Not available

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Structure

Type: L
Description: Faults Which Border Tactite Bodies

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Alterations

Alteration Type: L
Alteration Text: Silicification

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Rocks

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

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Analytical Data

Analytical Data: 2000 PPM MN, 30 PPM B, 150 PPM BA, 15 PPM CO, 10 PPM CR, 100 PPM CU, 30 PPM LA, 300 PPM MO, 50 PPM NI, 15 PPM PB, 7 PPM SC, 150 PPM SR, 50 PPM V, 15 PPM Y, 70 PPM ZR. HIGHER GRADE PORTIONS OF THE TACTITE BODIES AS EXPOSED IN PRESENT WORKINGS RUN 0.4 TO 0.5% W03.
Analytical Data: SAMPLE 2888 CONTAINS 7% FE, 0.7% MG, 3% CA, 0.01% TI, 1500 PPM MN, 200 PPM AS, 10 PPM 3, 200 PPM BA, 10 PPM BI, 15 PPM CO, 100 PPM CU, 20 PPM LA, 20 PPM MO, 50 PPM NI, (OPPM V, 500 PPM W, 15 PPM ZR. SAMPLE 2889 CONTAINS 7% FE, 0.5% MG, 15% CA, 0.02% TI, +5000 PPM MN, 15 PPM CU, 20 PPM NI, 20 PPM SN, 100 PPM SR, 70 PPM V, 200 PPM W, 10 PPM Y, 20 PPMZR. SAMPLE 2892 CONTAINS 10% FE, 0.7% MG, 0.07% CA, 0.2% TI, 10 PPM MN, 1 PPM AG, +2000 PPM B, 200 PPM BA, 10 PPM CO, 50 PPM CR, 20 PPM CU, 5 PPM MO, 15 PPM SC, 150 PPM V, 10 PPM Y, 100 PPM ZR. SAMPLE 2893 CONTAINS 3% FE, 1% MG, 10% CA, 0.1% TI

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Materials

Ore: Molybdenite
Ore: Scheelite
Ore: Chalcopyrite
Gangue: Calcite
Gangue: Quartz
Gangue: Diopside
Gangue: Garnet
Gangue: Tremolite
Gangue: Pyrite
Gangue: Epidote

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Comments

Comment (Geology): ABUNDANT PYRITE, LARGELY OXIDIZED, OCCURS IN THE HORNFELS BETWEEN THE TWO TACTITE BODIES THE LARGE, IRREGULARLY-SHAPED FELSITE DIKE BORDERING CROSBY MINE ON EAST HAS DISSEMINATED PYRITE AND HAS BEEN PROSPECTED IN A MINOR WAY FOR GOLD AND SILVER. TACTITE BODY IS CUT OFF TO THE N AND E BY QUARTZ MONZONITE, AND ON THE SE BY A LARGE NEARLY CIRCULAR BARREN WHITE QUARTZ PLUG WITH A DIAMETER OF ABOUT 750 FT. COSALITE OCCURS IN LATE-STAGE QUARTZ VEINS WHICH CUT TACTITE, SCHEELITE IS PRESENT IN PEGMATITE AND ALTERED QUARTZ MONZONITE NEXT TO TACTITE.

Comment (Commodity): POSSIBLE SOURCE OF AU, AG, CU AND BI IN ADDITION TO W.

Comment (Location): UTM IS TO ADIT (NBMG SAMPLE SITE 2888) WITH MANY OTHER SURROUNDING WORKINGS. LOCATION FROM DELETED MRDS #M231150 IS: 39-56-28N; 119-17-11W ; INFO FROM LAND.ST :(1972)

Comment (Development): NEW STAKING ON SE SIDE OF MAIN HILL (1985). DIGGER CLAIMS STAKED IN NOV 1984 BY BARIUM INC. OF RENO, NV. MINE IS ON PATENTED LAND PURCHASED FROM SOUTHERN PACIFIC BY STODDARD, TURNER AND CROSBY IN 1943

Comment (Deposit): MAIN TACTITE ZONE AT CONTACT OF CALCAREOUS SEDIMENTS WITH GRANITIC INTRUSIVES. A LATE STAGE PLUG-SHAPED PEGMATITE BODY ASSOCIATED WITH FELSIC DIKES FORMS A DOMINANT FEATURE ALONG THE RIDGE WHERE IT CROPS OUTEAST OF THE MAIN TACTITE ZONE. THE TACTITE ZONE WAS SAMPLED (SAMPLE 2889) ON THE WEST SIDE OF THE MINE IN A ZONE WHICH INCLUDED EPIDOTE AND TUNGSTEN MINERALIZATION. ON THE SE SIDE OF THE MINE, A QUARTZ VEIN ANDSKARN ZONE WERE SAMPLED (SAMPLE 2893) FROM A DUMP AND ADIT. THIS SITE WAS IDENTIFIED AS BEING PART OF THE DIGGER CLAIMS STAKED IN 1984 BY BARIUM INC, OF RENO, NV. MINERALIZATION ASSOCIATED WITH THIS SITE INCLUDES MOLYBDENITE, PYRITE, CHALCOPYRITE, AND POSSIBLY ARGENTIFEROUS COSALITE, A LEAD-BISMUTH SULFOSALT. ABOUT A HALF MILE ESE OF MAIN WORKINGS WAS A CAVED ADIT ALONG THE E-W DRAINAGE WHICH CUT A N-TRENDING SHEARZONE. THE SHEAR WAS IN PYRITIZED SEDIMENTS REPORTED TO HAVE CARRIED AU-AG MINERALIZATION. SAMPLE 2892 WAS TAKEN FROM BOTH THE DUMPS AND THE PYRITIZED

Comment (Deposit): SHEARZONE. SAMPLE 2888 WAS TAKEN SELECTIVELY FROM THE BIG ORE BINON THE LOWER WEST SIDE OF THE MAIN WORKINGS AND SHOULD BE CONSIDERED A COMPOSITE OF THE MAIN MINE WORKINGS. THE SE TACTITE BODY IS 400 FT LONG, U-SHAPED WITH THE 2 ARMS OF THE U ABOUT 50 FT THICK, GRADING INTO CALC-SILICATE HORNFELS ON THE WEST, FAULTED ALONG THE EAST MARGIN. SOME SCHEELITE OCCURS IN ALTERED QUARTZ MONZONITE ADJACENT TO THE MAIN TACTITE BODY.

Comment (Workings): WORKINGS ARE OF CONSIDERABLE SIZE AND EXTENT INCLUDING SEVERAL SHAFTS AND ADITS WITH SEVERAL HUNDRED FEET OF DRIFTS, RAISES, WINZES; WITH SHALLOW PROSPECT PITS AND OPEN CUTS

Comment (Deposit): THIS RECORD HAS BEEN MERGED WITH M231150, WHICH HAS BEEN DELETED.

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References

Reference (Deposit): QUADE, JACK, 28 FEB 85, NBMG FIELD EXAMINATION AND SAMPLE ANALYSES.

Reference (Deposit): BONHAM, H.F., JR., 1969, GEOLOGY & MINERAL DEPOSITS OF WASHOE AND STOREY COUNTIES, NV, NBMG BULL 70, P. 71-72.

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

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

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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.