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Paradise Peak Mine

Past Producer in Nye county in Nevada, United States with commodities Gold, Silver, Mercury, Barium-Barite, Bismuth, Lead, Antimony, Titanium, Metal, Tin, Molybdenum, Thallium, Iron
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Mining district
  17. Land status
  18. Ownership information
  19. Production statistics
  20. Reserves and resources
  21. Links to other databases
  22. Bibliographic references
  23. General comments
  24. Reporter information

Geologic information

Identification information

Deposit ID 10037787
MRDS ID M042771
Record type Site
Current site name Paradise Peak Mine
Alternate or previous names Granny Goose, Paradise, Fmc Deposit, NBMG Sample Sites 1472, 1473, Goose Claims, Gabbs Mine, Nody Prospect, Finger Rock Prospect, County Line, Ketchup Flat
Related records 10198457, 10310352

Geographic coordinates

Geographic coordinates: -117.97066, 38.74936 (WGS84)
Elevation 1670
Relative position ABOUT 8 MILES SSW OF GABBS

Site location context

Political divisions (FIPS codes)

Nye(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Granny Goose Well(quadrangle 1:24,000 scale)

Ione Valley(quadrangle 1:100,000 scale)

Tonopah(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Gabbs Valley(hydrologic unit)

Central Nevada Desert Basins(hydrologic accounting unit)

Central Nevada Desert Basins(hydrologic subregion)

Great Basin(hydrologic region)

Geographic areas

Country State County
United States Nevada Nye

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 010N 036E 04 Nevada

Comments on the location information

  • UTM IS TO SAMPLE SITE 1472 ON DISCOVERY SITE HILL. ELEVATION TO TOP BENCH OF MINE. . INFO FROM LAND.ST :(1972); PREVIOUS QUAD DESIGNATION = TONOPAH (1971) 1:250000; PREVIOUS QUAD DESIGNATION = GRANNY GOOSE WELL (1980) 1:24000

Commodities

Commodity Importance
Gold Primary
Silver Primary
Mercury Secondary
Barium-Barite Critical Tertiary
Bismuth Critical Tertiary
Lead Tertiary
Antimony Critical Tertiary
Titanium, Metal Critical Tertiary
Tin Critical Tertiary
Molybdenum Tertiary
Thallium Tertiary
Iron Tertiary

Comments on the commodity information

  • INITIALLY, 46 OF 77 TEST HOLES AVERAGED 0.14 OZ/T AU, 4.7 OZ/T AG. AU OCCURS AS NATIVE AU WITH NEGLIGIBLE AG CONTENT. AG IS PRESENT AS CERARGYRITE, EMBOLITE, ACANTHITE, NATIVE AG, AND IODYRITE. CINNABAR IS FOUND IN VUGS IN SILICIFIED ROCK; HG DEPOSITION APPARENTLY POST-DATES THE MAIN DEPOSITION OF AU AND AG. THE AG:AU RATIO RANGES FROM 4:1 IN THE UPPER PORTIONS TO >500:1 IN THE LOWEST PORTIONS OF THE ORE ZONE. THE AG:AU RATIO VARIES WITH AG CONTENT SINCE AU CONTENT COMMONLY STAYS HIGH THROUGHOUT THE ORE ZONE. THE OVERALL AG:AU RATIO IS APPROX. 33:1. THE ANOMALOUS GEOCHEMICAL SUITE ASSOCIATED WITH AU-AG ORE IS BI + SB + HG + BA + PB + TI + AS FEMO SN TL. THIS SUITE APPEARS TO BE A HYBRID OF SOME ELEMENTS COMMON IN HOT SPRINGS SYSTEMS AND OTHER ELEMENTS TYPICAL OF DEEPER, GENERALLY HIGHER TEMPERATURE SYSTEMS. HIGHLY ELEVATED LEVELS OF MO AND SN IN SOME SAMPLES MAY INDICATE A CLOSE GENETIC RELATIONSHIP TO A SHALLOW FELSIC INTRUSION. BASE METALS TEND TO INCREASE WITH DEPTH, BUT CU AND ZN
  • REMAIN EXTREMELY LOW THROUGHOUT THE ORE ZONE, AND THUS FAR BASE-METAL RICH VEINS HAVE NOT BEEN DISCOVERED BENEATH THE AU-AG ORE ZONE.

Materials information

Materials Type of material
Acanthite Ore
Cerargyrite Ore
Cinnabar Ore
Embolite Ore
Iodyrite Ore
Silver Ore
Alunite Gangue
Barite Gangue
Calomel Gangue
Chalcedony Gangue
Galena Gangue
Illite Gangue
Jarosite Gangue
Kaolinite Gangue
Limonite Gangue
Marcasite Gangue
Metacinnabar Gangue
Plumbojarosite Gangue
Pyrite Gangue
Pyrrhotite Gangue
Quartz Gangue
Realgar Gangue
Sphalerite Gangue
Stibnite Gangue
Sulfur Gangue
Tetrahedrite Gangue

Alteration

  • (Local) Propylitization, Alunite-Jarosite Alteration, Argillization, Dense Silicification, Powdery Silicification (Acid Leaching?). See Geology Comments.

Analytical data

Result NBMG TOOK TWO SAMPLES. SAMPLE 1472 OF BRECCIATED, SILICIFIED RHYOLITE CONTAINS 0.7% FE, 0.02% MG, 0.5% CA, 0.5% TI, 50 PPM MN, 30 PPM AG, 5000 PPM BA, 700 PPM BI, 70 PPM CU, 5 PPM MO, 100 PPM PB, 1500 PPM SB, 5 PPM SC, 100 PPM SR, 20 PPM V, 150 PPM ZR, AND 1.05 PPM AU (BY AA ANALYSIS). SAMPLE 1473 CONTAINS 1% FE, 0.02% MG, 1% CA, 0.5% TI, 70 PPM MN, 50 PPM AG, 2000 PPM BA, 50 PPM BI, 30 PPM CU, 5 PPM MO, 70 PPM PB, 500 PPM SB, 5 PPM SC, 300 PPM SR, 20 PPM V, 150 PPM ZR, AND 1.5 PPM AU (BY AA ANALYSIS).

Mineral occurrence model information

Model code 154
USGS model code 25e
Deposit model name Epithermal quartz-alunite Au
Mark3 model number 38

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Stratigraphic age (youngest) Miocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name Composite Tuff;;
    Rock description Composite Tuff;;

Nearby scientific data

(1) -117.97066, 38.74936
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Walker Lane, Nw-Striking.
Type of structure Local
Structure description See Comments

Ore body information

  • General form DISSEMINATED
    Plunge 15-25
    Plunge direction SE
    Thickness 125M
    Length 450M
    Width 200M
  • General form DISSEMINATED

Controls for ore emplacement

  • Alunitic And Silicic Alteration And Precious Metal Mineralization Appear To Be Controlled By Throughgoing Nw-Trending High-Angle Fractures And Faults, Which Are Perhaps Related To Pre-Basin And Range Extension. Hydrothermal Breccia Zones, Possibly Forming Rings, Are A Major Control Of Au-Ag Deposition.

Comments on the geologic information

  • ALTERATION COMMENTS: PROPYLITIZATION, ALUNITE-JAROSITE ALTERATION, ARGILLIZATION, DENSE SILICIFICATION, POWDERY SILICIFICATION (ACID LEACHING?). OLIGOCENE ANDESITE AND OLIGO-MIOCENE TUFF UNDERLYING THE PRINCIPAL ORE HOST ROCKS ARE WEAKLY TO STRONGLY PROPYLITIZED, WHICH PROBABLY REFLECTS DEUTERIC ALTERATION THAT PREDATES THE MAIN HYDROTHERMAL SYSTEM AT PARADISE PEAK. HYPOGENE ALUNITE-JAROSITE ALTERATION PRIMARILY OCCURS AS A CRUDELY STRATIFORM LAYER 20-40 M THICK BELOW HYDROTHERMAL BRECCIAS THAT CAP THE DEPOSIT AND ABOVE THE MAIN SILICIFIED ORE ZONE. ARGILLIC ALTERATION CONSISTS DOMINANTLY OF SMECTITE, OPAL-CT, QUARTZ AND LEUCOXENE, WITH MINOR MIXED LAYER ILLITE-SMECTITE AND/OR KAOLINITE PRESENT. UNOXIDIZED ARGILLIZED ROCKS ALSO CONTAIN 5-15% DISSEMINATED FINE GRAINED PYRITE AND/OR MARCASITE. ARGILLIZATION IS WELL DEVELOPED IN THE UPPER ANDESITES THAT OVERLIE THE MAIN SILICIFIED ZONE AND IN THE DACITE PORPHYRY BELOW THE MAIN SILICIFIED ZONE. BOTH ALUNITE-JAROSITE ALTERATION AND
  • ARGILLIZATION POSSIBLY OCCURRED DURING THE EARLY STAGES OF DENSE SILICIFICATION. TWO TYPES OF SILICIFICATION, DENSE AND POWDERY, ARE DISTINGUISHED ON CROSS SECTIONS AND BENCH MAPS AND ARE THE TWO DOMINANT TEXTURAL TYPES OF SILICIFICATION PRESENT IN THE DEPOSIT, ALTHOUGH ALL GRADATIONS EXIST. DENSE SILICIFICATION CONSISTS OF VERY FINE-GRAINED QUARTZ (0.01-0.05 MM) AND/OR OPAL, 5-20% FINE GRAINED DISEMINATED MARCASITE AND/OR PYRITE (TYPICALLY <0.025 MM), AND A TIO2 PHASE (ANATASE OR LEUCOXENE) THAT TOTALLY REPLACE THE ROCK EXCEPT FOR QUARTZ AND ZIRCON PHENOCRYSTS. DENSE SILICIFICATION IS ASSOCIATED WITH AU-AG DEPOSITION. RELICT TEXTURES IN POWDERY SILICIFIED ROCKS SUGGEST THAT MANY OF THESE ROCKS WERE FIRST DENSELY SILICIFIED (+ FINE-GRAINED SULFIDE MINERALS) AND WERE LATER OXIDIZED, PARTIALLY LEACHED, AND RECRYSTALLIZED TO POWDERY SILICA (ACID LEACHING BY ASCENDING FLUIDS?). POWDERY SILICA ALTERATION IS ASSOCIATED WITH HG DEPOSITION. GEOLOGY COMMENTS: SIX MAJOR EPISODES OF
  • HYDROTHERMAL ACTIVITY ARE RECOGNIZED WITHIN ORE ZONES: EARLY SILICA-SULFIDE ALTERATION, 2) EARLY HYDROTHERMAL BRECCIATION, 3) EARLY OXIDATION AND LEACHING, 4) BLACK MATRIX HYDROTHERMAL ALTERATION, 5) OPAL-JAROSITE MATRIX HYDROTHERMAL BRECCIATION, AND 6) LATE OXIDATION AND LEACHING. SEVERAL OTHER HYDROTHERMAL EVENTS ARE EVIDENT IN SURROUNDING WALLROCKS. MINERALOGY, ALTERATION, TEXTURAL AND STRUCTURAL FEATURES, AND LIMITED FLUID INCLUSION AND STABLE ISOTOPE DATA INDICATE THAT THE PARADISE PEAK DEPOSIT FORMED AT VERY SHALLOW DEPTHS (<200M) AND LOW TEMPERATURES (150-200 DEGREES C) FROM ACIDIC, LOW SALINITY, PERIODICALLY BOILING FLUIDS. ALTHOUGH IT IS CLASSIFIED AS AN ACID-SULFATE TYPE HYDROTHERMAL SYSTEM, TYPES AND DISTRIBUTION OF HYDROTHERMAL ALTERATION, INTENSITY OF HYDROTHERMAL BRECCIATION, AND THE GEOCHEMICAL SUITE OF ELEMENTS IN THE DEPOSIT DIFFER FROM BOTH TYPICAL HOT SPRING GOLD DEPOSITS AND DEEPER LEVEL ACID-SULFATE SYSTEMS.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Medium
Significant No
Discovery year 1934
Discoverer Mr. And Mrs. William Arnell
Year of first production 1986
Year of last production 1994
Production years AU: 1986 - 1994

Mining district

District name Fairplay District

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Owner-Operator
    Owner Fmc Gold Corp.
    First year 1993

Production statistics

  • Year 1988
    Material HG
    Accuracy Accurate
    Description Ap_Grade: ^0.168 Opt (2)

Reserves and resources

  • Type In-situ
    Estimate year 1984
    Total resources 13605000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 2.823 g/mt Gold Major 1984
    Silver Ag 98.824 g/mt Silver Major 1984
  • Type In-situ
    Estimate year 1989
    Commodity Subtype Grade units Group Importance Year
    Gold Au 2.541 g/mt Gold Major 1989
    Silver Ag 102.213 g/mt Silver Major 1989
  • Type Leaching
    Estimate year 1989
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.016 g/mt Gold Major 1989
    Silver Ag 12.564 g/mt Silver Major 1989

Comments on the reserve resource information

  • STRIPPING RATIO 2:1

Comments on the workings information

  • HISTORIC WORKINGS AT THE NODY PROSPECT CONSISTED OF A 40 FT. SHAFT AND SEVERAL SURFACE TRENCHES. MODERN FACILITY CONSISTS OF AN OPEN PIT, 4000 TPD MILL, AND HEAP LEACH FACILITIES.

Comments on development

  • EXPL.COM: ON THE BASIS OF VISIBLE HYDROTHERMAL ALTERATION AND PRESENCE OF OLD HG WORKINGS IN THE AREA, PROSPECTORS MR. AND MRS. WILLIAM ARNELL BROUGHT THE PARADISE PEAK PROPERTY TO THE ATTENTION OF FMC GEOLOGISTS IN 1982. THE FIRST SAMPLES FROM THE DEPOSIT COLLECTED BY FMC GEOLOGISTS IN EARLY 1983 WERE HIGHLY ANOMALOUS IN AU AND AG. FOLLOWING A DETAILED SURFACE SAMPLING PROGRAM, DRILLING BEGAN IN JUNE, 1983. THE FIRST DRILL HOLE INTERCEPTED OVER 80 FT. OF ALTERED ROCK CONTAINING O.35 OPT AU; 7 0F THE FIRST 18 HOLES ENCOUNTERED ORE. DRILLING ON 60 M CENTERS WAS COMPLETED IN DECEMBER, 1983 AND WAS IMMEDIATELY FOLLOWED BY DRILLING ON 30M CENTERS OVER THE ORE ZONE. 7TH LARGEST GOLD DISCOVERY IN RECENT U.S. HISTORY, ANNOUNCED IN JAN. 1984. MILL CONSTRUCTION BEGAN ON JANUARY 1, 1985, MINING BEGAN IN DECEMBER, 1985, AND THE FIRST DORE WAS POURED IN APRIL, 1986. ; TOTAL$: 100 ; ECON.COM: PLANNED 100,000 OZ AU/YR AND 3.5 MILLION OZ AG/YR PRODUCTION, AS WELL AS 200,000 LB HG PER YEAR, ORE
  • PRODUCTION CAPACITY: 1-3 MILLION TONNES/YR. EXPECTED TO HAVE A 10-YR LIFE. MILL HAS A DESIGN CAPACITY OF 4000 TPD. OVER THE MINE LIFE, THE STRIP RATIO WILL AVERAGE 1.5:1. DORE IS 96 WEIGHT % AG, 3.5 WEIGHT % AU. A TOTAL OF 185 PERSONS WERE EMPLOYED BY FMC AT PARADISE PEAK IN 1986. MINING CEASED: MAIN PIT-APRIL 1993; COUNTY LINE OREBODY-APRIL 1992; KETCHUP FLAT-AUGUST 1993. MILLING CEASED IN MAY 1993. PRODUCTION FROM ORE ON LEACH PADS WILL CEASE IN 1994. DEPOSIT/OREBODIES MINED OUT (READ, ORAL COMM.).

Reference information

Bibliographic references

  • Deposit

    BONHAM, H.F., JR., 11 SEP 84, NBMG FIELD EXAMINATION REPORT AND SAMPLE ANALYSIS

  • Deposit

    THOMASON, ROBERT, E., F.M.C., 1986, G.S.N. LECTURE ON PARADISE PEAK GOLD DEPOSIT.

  • Deposit

    RENO GAZETTE-JOURNAL, OCT 1985, "BIG GOLD, SILVER DEPOSIT DISCOVERED NEAR GABBS.

  • Deposit

    NBMG MINING DISTRICT FILE 227, MANY PRESS CLIPPINGS, 1984-1986, ITEMS 19, 20

  • Deposit

    NBMG REPT 41, 1986, PRECIOUS METAL MINERALIZATION IN HOT SPRINGS SYSTEMS

  • Deposit

    NBMG MI-1985, 1986, P. 6, 8.

  • Deposit

    ROCKY MOUNTAIN PAY DIRT, APRIL 1988, P. 124

  • Deposit

    THOMASON, R. E., 1986, GEOLOGY OF THE PARADISE PEAK GOLD/SILVER DEPOSIT IN TINGLEY , J.V. AND BONHAM, H. F., PRECIOUS METAL MINERALIZATION IN HOT-SPRINGS SYSTEMS, NEVADA-CALIFORNIA, NEVADA BUREAU OF MINES AND GEOLOGY REPORT 41, P. 90-92

  • Deposit

    THOMASON, R.E., 1987, GEOLOGY OF THE PARADISE PEAK GOLD/SILVER DEPOSIT IN JOHNSON, J.L. ED, GUIDEBOOK FOR FIELD TRIPS: GEOLOGICAL SOCIETY OF NEVADA SYMPOSIUM, BULK MINEABLE PRECIOUS DEPOSITS OF THE WESTERN U.S., RENO, P. 250-253

  • Deposit

    JOHN, D. A., NASH, J.T., CLARK, C.W.,WULFTANGE,W.H., 1990, GEOLOGY OF THE PARADISE PEAK DEPOSIT, IN BUFFA, R. ED, GUIDEBOOK FOR FIELD TRIPS: GEOLOGICAL SOCIETY OF NEVADA SYMPOSIUM, BULK MINEABLE PRECIOUS DEPOSITS OF THE WESTERN U.S., FIELDTRIP 11, RENO

  • Deposit

    BONHAM, H.F. AND HESS, R.H., 1990, BULK-MINEABLE PRECIOUS METAL DEPOSITS IN NEVADA MINING INDUSTRY , NEVADA BUREAU OF MINES AND GEOLOGY, MI-89

  • Deposit

    FMC GOLD, ANNUAL REPORTS, 1987,88,89

  • Deposit

    NEVADA MINERAL RESERVES AND RESOURCES DATA BASE, NEVADA BUREAU OF MINES AND GEOLOGY DB7

  • Deposit

    JOHN, D., THOMASON, R., AND MCKEE, E., 1989, GEOLOGY AND K-AR GEOCHRONOLOGY OF THE PARADISE PEAK MINE AND THE RELATIONSHIP OF PRE-BASIN AND RANGE EXTENSION TO EARLY MIOCENE PRECIOUS METAL MINERALIZATION IN WEST-CENTRAL NEVADA: ECONOMIC GEOLOGY, VOL. 84, P. 631-649.

  • Deposit

    JOHN, D., NASH, J., CLARK, C., AND WULFTANGE, W., 1991, GEOLOGY, HYDROTHERMAL ALTERATION, AND MINERALIZATION AT THE PARADISE PEAK GOLD-SILVER-MERCURY DEPOSIT, NYE COUNTY, NEVADA, IN RAINES, G.L., ET AL, EDS., GEOLOGY AND ORE DEPOSITS OF THE GREAT BASIN, THE GEOLOGICAL SOCIETY OF NEVADA, RENO, P. 1020-1050.

  • Deposit

    DOBAK, P., 1988, ALTERATION AND PARAGENESIS OF THE PARADISE PEAK GOLD/SILVER DEPOSIT, UNPUBLISHED M.S. THESIS, COLORADO STATE UNIVERSITY, 141 P.

  • Deposit

    SKILLINGS, D., 1986, FMC'S PARADISE PEAK GOLD/SILVER MINE OFFICIALLY DEDICATED JUNE 28, SKILLINGS' MINING EVIEW, AUGUST 9, P. 4-7.

  • Deposit

    NBMG, 1991, THE NEVADA MINERAL INDUSTRY - 1990, NBMG SPECIAL PUBLICATION MI-1990.

  • Deposit

    READ, MIKE, 1993, ORAL COMMUNICATION ON STATUS OF PARADISE PEAK OPERATIONS FROM FMC GOLD'S PARADISE PEAK MINE, 4 AUGUST, 1993

  • Deposit

    MINING MAGAZINE, JANUARY 1989, P44

  • Deposit

    NBMG, 1994, MI-1993

  • Deposit

    NEVADA DIVISION OF MINERALS, 1994

  • Production

    (2) FMC, 1989, ANNUAL REPORT (4)FMC, 1988, ANNUAL REPT (5)FMC ANNUAL REPT, 1987 (6) DB7, (7) NBMG, 1991, THE NEVADA MINERAL INDUSTRY - 1990, NBMG SPECIAL PUBLICATION MI-1990 NBMG MI-1993

  • Reserve-Resource

    THOMASON, R. (1986), ORAL COMMUNICATION (2) FMC, 1989, ANNUAL REPT (3) JOHN, 1990 (4)FMC, 1988, ANNUAL REPT (5)FMC, 1987, ANNUAL REPT (4)FMC, 1988 ANNUAL REPT NBMG MI-1993

General comments

Subject category Comment text
Deposit STUDIES TO DATE SUGGEST AT LEAST 3 STAGES OF HYPOGENE AU DEPOSITION FORMED AN ORE ZONE THAT IS ELLIPTICAL, ABOUT 200 BY 450 M IN PLAN AND ELONGATED IN A NW DIRECTION. SOME HOST ROCK IS BRECCIATED WITH QUARTZ-SULFIDE MATRIX. BRECCIA EXHIBITS HYDROTHERMAL REPLACEMENT TEXTURE. BOTTOM OF ORE ZONE IS NOT YET DEFINED, BUT IT DIPS 15 SE, AND THINS OUT ON SE EDGE, TO 15-20 FT THICK. MINERALIZATION IS BOUNDED ON THE WEST SIDE BY A FAULT WHICH WAS ACTIVE BEFORE MINERALIZATION EVENT, ACTING AS A DAM TO MINERALIZING FLUIDS. FAULTS OFFSET ORE ZONE ON NORTH AND EAST SIDES. CURVILINEAR FAULTS ENCIRCLE ORE ZONE AND DROP CENTER DOWN. ORE ZONE IS NEARLY STRATIFORM CONFINED LARGELY TO THE FELSIC VOLCANICS ALTHOUGH THERE IS SOME AU-AG MINERALIZATION IN THE UNDERLYING DACITES. AU-AG MINERALIZATION IS CONFINED TO THE SILICIFIED ROCKS. ORE ZONE IS ABOUT 100 FT THICK. ORE ZONE BOUNDARIES ARE SHARP.
Deposit THIS RECORD CONTAINS INFORMATION FROM MRDS RECORD W700600, WHICH HAS BEEN DELETED.
Deposit First Production Year: 1986 (AU)
Deposit Discovery Year: 1934 (HG); 1982 (AU)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-86 La Pointe, D.D. (Tingley, J.V.) Nevada Bureau of Mines and Geology
Updater 01-NOV-88 La Pointe, D.D. Nevada Bureau of Mines and Geology
Updater 01-AUG-89 Beougher, Dee (Spanski, Gregory T.) U.S. Geological Survey
Updater 01-AUG-90 Marcus, Sue U.S. Geological Survey
Updater 01-APR-92 Phinisey, J. D. (Marcus, S.) U.S. Geological Survey
Updater 01-AUG-93 Marcus, Susan U.S. Geological Survey
Updater 01-SEP-94 Li, Zhiping (Moyer, Lorre A.) U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

Maps centered on this site

Authoritative Nevada resources

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