Manhattan Mine

Site Name

Primary: Manhattan Mine
Secondary: Claim Group: Big Four, Mayflower, Reilley Fraction, Iron Queen,
Secondary: Iron King, Gold Wedge, Little Grey, Jumpingjack, June, St. George,
Secondary: Stary Dog, Skookum
Secondary: Houston Oil and Minerals Tenneco Manhattan Project
Secondary: Houston Oil and Minerals Tenneco Manhattan Project.Nbmg Samplesite
Secondary: 3217 and 3218.

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Commodity

Primary: Gold
Primary: Silver

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Location

State: Nevada
County: Nye
District: Manhattan District

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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.

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Holdings

Not available

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Workings

Not available

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Ownership

Owner Name: Echo Bay
Years: 1980 -

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Production

Year: 1981
Time Period: 1980-1981
Material type: AU ORE
Description: Cp_Grade: ^0.05 Oz/Ton 700 Fine Gold

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Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1980
Year Last Production: 1984
Discovery Method: 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: Epithermal vein, Comstock

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Orebody

Form: TABULAR

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Structure

Type: R
Description: S. Margin Of The Tertiary Manhattan Caldera

Type: L
Description: Faults Cut Ore; Gently Dipping Thrust Sheets

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Alterations

Alteration Type: L
Alteration Text: Pyritization

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Rocks

Name: Schist
Role: Host
Age Type: Host Rock Unit
Age Young: Late Cambrian

Name: Schist
Role: Host
Age Type: Host Rock
Age Young: Late Cambrian

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Analytical Data

Analytical Data: SAMPLE 3217 OF PHYLLITE WITH QUARTZ, ADULARIA FROM NW AREA CONTAINS 3% FE, 0.7 MG, 0.15% CA, 0.7% TI, 200 PPM MN, 3PPM AG, 20 PPM B, 1000 PPM BE, 15 PPM CO, 100PPM CR, 30 PPM CU, 20 PPM LA, 20 PPM NI, 20 PPM PB, 7 PPM SC, 70 PPM V, 20 PPM Y, 200 PPM ZR,AND BY AN ANALYSIS, 4.2 PPM AU. SAMPLE 3218 FROM THE SE AREA OF THE MINE CONTAINS 2% FE, 0.5 % MG, 0L15% CA, 0.7% TI, 200 PPM MN, 200 PPM AS, 15 PPM B, 500 PPM BE, 7 PPM CO, SO PPM CR, 15 PPM CU, 20 PPM LA, 15 PPM NI, 15 PPM PB, 7PPM SC, 70 PPM V, 20 PPM Y, 300 PPM ZR, AND BY AA ANAYLSYS, 0.4 PPM AU.

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Materials

Ore: Electrum
Gangue: Quartz
Gangue: Calcite
Gangue: Pyrite
Gangue: Iron

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Comments

Comment (Deposit): NARROW VEINLETS ALONG JOINT PLANES AND TO A LESSER EXTENT ALONG BEDDING PLANES. IN THE NW PORTION OF THE MINING AREA, A NW-TRENDING WEST-DIPPING FAULT ZONE IN GOLD HILL CONTROLS ORE DEPOSITION. ORE IS ALONG FAULT ZONE IN BRECCIA AND HAS DEVELOPED IN WALLSPLITS. FAULT DIPS 60 W AT SURFACE, BUT FLATTENS AT DEPTH. ORE OCCURS MAINLY IN DRUSY QUARTZ VEINLETS WITH SOME LAMELLAR QUARTZ AFTER CALCITE. OREIS OXIDIZED WIT SOME ADULARIA AND MINOR FLOURITE. GOLD IS FINE-GRAINED, BUT PREDOMINANTLY VISIBLE PARTICLES. THE PREFERENTIAL HOST ROCK IS A SANDY PHYLLITE. ORE ZONE IS OPEN AT BOTH ENDS. IN THE SE PORTION OF THE MINE AREA, ORE OCCURS ALONG A N-TREND FAULT ZONE AND CONSISTS OF SILICIFIED BRECCIA, DRUSY QUARTZ VEINLETS. THERE IS SOME UNIXIDIZE PYRITE NEAR THE EAST PIT AND OLD BIG FOUR MINE.

Comment (Workings): OPEN PIT AND NUMEROUS SHALLOW SHAFTS FROM EARLY 1900'S MINING OPERATIONS; EAST PIT AND WEST PIT.

Comment (Location): JUST SW OF TOWNSITE OF MANHATTAN. UTM TO NEAR CENTER OF CLAIM GROUP. LARGE MINE AREA WITH A NW PROTION AND A SE PORTION. ; INFO FROM LAND.ST :(1972)

Comment (Commodity): SOME OF THE GOLD IS QUITE COARSE

Comment (Development): HOUSTON PURCHASED THE CLAIMS FROM SUMMA CORP. IN 1977. THEY WERE OPEN -PITTING IN 1979, AND COMPLETED MILL IN MAY 1980; MINE WAS ACTIVE IN 1980 , 1981, EMPLOYING ABOUT 50 PERSONS IN THE MINE AND MILL. PRODUSTION SLOWED AND FINALLY HALTED TEMPORARILY IN EARLY 1982 DUE TO LOW PRECIOU METALS PRICES. HOUSTON OIL AND MIN. CO. (LATER TENNELD) WAS TAKEN OVER BY ECHO BAY MINES IN 1986. OPEN PIT MINE WAS OERATION AT TIME OF EXAMINATION IN1986 WITH GRAVITY CIRCUIT AND CONVENTIONAL CYANIDE MILL IN USE FOR GOLD RECOVERY.PEN-PITTING IN 1979, AND COMPLETED MILL IN MAY 1980. MINE WAS ACTIVE IN 1980,1981 AND 1982, EMPLOYING ABOUT 50 PERSONS IN THE MINE AND MILL. PRODUCTION SLOWED AND FINALLY HALTED TEMPORARILY IN EARLY 1982 DUE TO LOW PRECIOUS METALS PRICES.MINE WAS ACTIVE IN 1983 EMPLOYING ONLY 10 PERSONS.MINE WAS ACTIVE IN 1983 EMPLOYING ONLY 10 PERSONS.

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References

Reference (Deposit): DIVISION OF MINE INSPECTION, DEC., 1983, DIRECTORY OF NEVADA MINE OPERATIONS ACTIVE DURING CALENDAR YEAR 1983.

Reference (Deposit): NBMG MAP 84, 1983, ACTIVE MINES AND OIL FIELDS.

Reference (Deposit): BONHAM, H.F., JR., 29 MAY 86, NBMGFIELD EXAMINATION AND SAMPLE ANALYSES.

Reference (Deposit): TINGLEY, J.V., AND QUADE, J., 1986, NBMG OFR 86-14?

Reference (Deposit): BONHAM, H.F., 1988, IN NBMG MI-1987

Reference (Deposit): BONHAM, H.F., 1986, NBMG MAP 91

Reference (Deposit): NEWS CLIPPINGS, AUG., 1981-88, NBMG DISTRICT FILE 240.

Reference (Deposit): STATE INSPECTOR OF MINES, 1981, DIRECTORY OF NEVADA MINE OPERATIONS ACTIVE IN CALENDAR YEAR 1981.

Reference (Deposit): MADDRY, J.W., 1987, REPORTS IN GSN SYPMOSIUM FIELD GUIDE AND TECHNICAL VOLUME

Reference (Production): NBMG MJ-1987. NEWS CLIPPINGS, AUG. 26, 1981

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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.