Black Jack Mine

Site Name

Primary: Black Jack Mine
Secondary: Eldorado
Secondary: Rudy
Secondary: Pearl
Secondary: NBMG Sample Sites 2521, 2522

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Commodity

Primary: Mercury

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Location

State: Nevada
County: Pershing
District: Imlay District; Humboldt District; Eldorado 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: Underground

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Ownership

Owner Name: Bonnie Noble And V. C. Biggs
Years: 1984 -

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Production

Year: 1914
Time Period: 1913-1914
Material type: HG
Description: Cp_Grade: ^7-20 Lb/Ton

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Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1913
Year Last Production: 1969
Discovery Year: 1906
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

Model Name: Almaden Hg

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Orebody

Form: TABULAR

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Structure

Type: R
Description: Humboldt Range ; Reg.Trends: North To Northeast

Type: L
Description: Low-Angle Shears At Shale-Limestone Contact.

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Alterations

Alteration Type: L
Alteration Text: Silicification

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Rocks

Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Late Jurassic

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

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

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Analytical Data

Analytical Data: ORE RAN TO 40 LB HG PER TON. SAMPLE 2521 IS AN ORE BIN GRAB SAMPLE OF JASPEROID AND GOSSAN, WITH SILICIFICATION, CALCITE VEINS, IRON OXIDES-, SB OXIDES? AND CONTAINS 20 % FE, 0.1 % MG, 2 % CA, 0.1 % TI,-10PPM MM,.5 PPM AG, 70 PPM B, 700 PPM BA, 100 PPM CR, 200 PPM -CU, 150 PPM MO, 50 PPM NI, 20 PPM PB, 300 PPM SR, 2000 PPM V, -200 PPM ZN, 30 PPM ZR. SAMPLE 2522 IS AN ORE BIN SELECT SAMPLE- OF PRIDA LIMESTONE WITH CALCITE VEINS, RECRYSTALLIZATION, CIN-NABAR, MARCASITE? AND IT CONTAINS 0.2 % FE, 0.5 % MG, +20 % CA-, 0.07 % TI, 100 PPM MN, 100 PPM BA, 5 PPM MO, 10 PPM NI, 2000- PPM SR, 150 PPM V, 20 PPM Y.

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Materials

Ore: Cinnabar
Gangue: Quartz
Gangue: Jarosite
Gangue: Calcite
Gangue: Pyrite

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Comments

Comment (Deposit): CONCENTRATION OF CINNABAR PRIMARILY CONTROLLED BY NEARLY FLAT CONTACT BETWEEN SHALE AND OVERLYING MASSIVE LIMESTONE. CINNABAR OCCURS IN A THIN-BEDDED LIMESTONE LAYER IN THE UPPER MEMBER OF THE PRIDA FM. THE CINNABAR OCCURS IN RECR-YSTALLIZED GRAY LIMESTONE WITH WHITE CALCITE VEINLETS. THE CIN-NABAR OCCURS ALONG FRACTURES AND DISSEMINATED ALONG BEDDING PL-ANES AS SMALL CRYSTALS UP TO 0.5 MM. THE MINERALIZED ZONE STRI-KES N40-50W AND DIPS 30 NE. THE MINERALIZED LIMESTONE IS ENVEL-OPED BY BRECCIATED AND SILICIFIED LIMESTONE (JASPERIOD) WITH L-ENSES OF GOSSAN. THERE IS NO VISIBLE CINNABAR IN THE JASPERIOD- OR GOSSAN.

Comment (Workings): WORKINGS CONSIST OF ABOUT 1,000 FT OF ADITS AND INTERCONNECTING STOPES.; OPEN CUT, DRILL HOLES PRESENT IN 1984

Comment (Geology): CONCENTRATION OF CINNABAR PRIMARILY CONTROLLED BY NEARLY FLAT CONTACT BETWEEN SHALE AND OVERLYING MASSIVE LIMESTONE. ; MAJOR.UNITS: TRIASSIC SEDIMENTARY ROCKS ; GEOL.DESC: TRIASSIC LIMESTONE AND SHALE INTRUDED BY JURASSIC (?) GRANITE

Comment (Deposit): DISCOVERED IN 1906. PRODUCTION YEARS 1913 AND 1940-41. WORKINGS CONSIST OF ABOUT 1,000 FEET OF ADITS AND INTERCONNECTING STOPES FROM WHICH ALL OF THE ORE WAS MINED. ROCKS OF THE AREA CONSIST OF LIMESTONE WITH THIN BLACK SHALE INTERBEDS PART OF THE TRIASSIC STAR PEAK FORMATION. THE PROPERTY IS THE OLDEST KNOWN CINNABAR DEPOSIT OF IMPORTANCE IN NEVADA. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV

Comment (Development): 20 FLASKS IN 1965. SINCE 1969, SOME UNDERGROUND AND SURFACE WORK HAS BEEN DONE WITH NO PRODUCTION RECORDED. IN 1981, THE SMALL SCREENING PLANT INSTALLED HIGH ON THE HILL NEAR THE PORTAL OF ONE OF THE LOWER ADITS WAS STILL ON THE PROPERTY AND THE REMAINS OF THE OLD RETORT WERE STILL AT THE MILL SITE IN THE CANYON ALTHOUGH THE ROTARY FURNACE HAD BEEN COMPLETELY REMOVED. IN 1984, SEVERAL DRILL ROADS 2-3 YEARS OLD AND 4 OR MORE ROTARY DRILL HOLES BENEATH THE MERCURY MINE WERE NOTED, BUT NO CURRENT ACTIVITY.

Comment (Development): FIRST STAKED IN 1906 AS THE RUBY CLAIM AND IS THE ONDEST KNOWN CINNABAR DEPOSIT OF CONSEQUENCE IN NEVADA. OPERATED IN 1913 AS THE RUBY MINE PRODUCING 425 FLASKS FROM A 12-PIPE RETORT BUILT IN THE CANYON BELOW THE MINE. 347 FLASKS RECOVERED IN 1914, BUT AFTER EXHAUSTION OF THE RICH ORE, THE PROPERTY REMAINED IDLE FOR OVER 25 YEARS. IN 1939, T. W. HEBBARD AND H. E. LUFEK RELOCATED THE PROPERTY AND CHANGED ITS NAME TO THE ELDORADO MINE. IN 1941-42, 199 FLASKS HG WERE PRODUCED FROM ORE HANDSORTED AT THE MINE SITE AND SLEDDED OUT IN WINTER TO THE RETORT SITE. IDLE IN 1943. WITH HIGHER HG PRICES, IN 195455 THE GROUND WAS RELOCATED AS THE BLACK JACK AND NOS. 1-6 CLAIMS BY BRIGGS AND FRANK NOBLE. A 25 TON GAS-FIRED ROTARY FURNACE PLANT WAS INSTALLED IN 1955 BY EARL SIMPSON, AND BY 1959, 263 FLASKS RECORDED PRODUCTION. IN 1961 AND 1964 A VERY FEW FLASKS WERE PRODUCED, PERHAPS BY A CLEANUP. FROM 1965 TO 1969, OWNERS REPORTED MINING, SCREENING AND MILLING ORE, BUT THE ONLY PRODUCTON RECORDED WAS

Comment (Location): ACCESSIBLE BY FAIR ROAD UP ELDORADO CANYON; PARTIALLY WASHED OUT.

Comment (Reserve-Resource): POSSIBLE RESERVES IN 1943.

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References

Reference (Deposit): JOHNSON, M.G., 1977, GEOLOGY AND MINERAL DEPOSITS OF PERSHING COUNTY, NEVADA: NBMG BULL. 89

Reference (Deposit): BAILEY AND PHOENIX, 1941, QUICKSILVER DEPOSITS IN NEVADA: NBMG BULL. 41

Reference (Deposit): HOLMES, 1965, MERCURY IN NEVADA; IN USBM 1C 8252

Reference (Deposit): SILBERLING AND WALLACE, 1967, GEOLOGIC MAP OF THE IMLAY QUADRANGLE, PERSHING COUNTY, NEVADA: USGS MAP GQ - 666.

Reference (Deposit): BONHAM, H. F., JR., 5 AUG 84, NBMG FIELD EXAMINATION REPORT AND SAMPLE ANALYSIS

Reference (Deposit): BAILEY, E. H., RYTUBA, J. J., AND JONES, R. B., 1984, UNPUBLISHED DATA ON HG DEPOSITS OF NEVADA, NBMG FILES.

Reference (Deposit): VANDERBURG, W. O., 1936, USBM IC 6902, P. 18.

Reference (Deposit): LINCOLN, F. C., 1923, NEVADA MINING DISTRICTS AND MINERAL RESOURCES; RENO, NV.

Reference (Production): BAILEY, ET AL., 1984.

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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.