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Preble Mine

Past Producer in Humboldt county in Nevada, United States with commodities Gold, Barium-Barite, Copper
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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. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Reserves and resources
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10045088
MRDS ID M232748
Record type Site
Current site name Preble Mine
Related records 10310314

Geographic coordinates

Geographic coordinates: -117.39207, 40.99795 (WGS84)
Elevation 1445
Relative position 6 1/2 MILES ENE OF GOLCONDA; 12 MILES S. OF PINSON

Site location context

Political divisions (FIPS codes)

Humboldt(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Golconda(quadrangle 1:24,000 scale)

Winnemucca(quadrangle 1:100,000 scale)

Winnemucca(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Humboldt(hydrologic unit)

Humboldt(hydrologic accounting unit)

Black Rock Desert-Humboldt(hydrologic subregion)

Great Basin(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management NV)

Bureau of Land Management NV BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Nevada Humboldt

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 036N 041E 18 CENTER OF NE OF SE Nevada

Comments on the location information

  • N. OF PREBLE ABOUT 1 MILE; CENTER OF S 1/2 SEC. 19.

Commodities

Commodity Importance
Gold Primary
Barium-Barite Critical Tertiary
Copper Tertiary

Materials information

Materials Type of material
Gold Ore

Alteration

  • (Local) Silicification (Jasperiod Development), But Not As Much As Pinson.

Analytical data

Result SAMPLE 487, A GRAB OF MATERIAL FROMPIT FACE, CONTAINS 5 % MG, 1 % CA, 0.3 % TI, 50 PPM MN, 1 PPM AG, 1500 PPM AS, 200 PPM B, 3000 PPM BA, 2 PPM BE, 50 PPM CO, 70 PPM CR, 150 PPM CU, 20 PPM MO, 100 PPM NI, 50 PPM PB, 150 PPM SB, 5 PPM SC, 500 PPM SR, 500 PPM V, 30 PPM Y, AND 100 PPM.

Mineral occurrence model information

Model code 172
USGS model code 26a
Deposit model name Carbonate-hosted Au-Ag
Mark3 model number 15

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock
    Stratigraphic age (youngest) Late Cambrian
    Stratigraphic age (youngest) Late Cambrian
  • Host or associated Host
    Rock type Metamorphic Rock > Phyllite
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate

Nearby scientific data

(1) -117.39207, 40.99795
ListMap

Economic information

Ore body information

  • General form TABULAR
    Strike NE
    Dip 30SE

Controls for ore emplacement

  • High Angle Fault Zones

Comments on the geologic information

  • MINERALIZATION OCCURS IN A BROAD NE-TRENDING ZONE OF SHEARING, BRECCIATION, AND SILICIFICATION. WHITE CALCITE VEINS ARE COMMON IN LIMESTONE BEDS, AND QUARTZ VEINLETS AND STOCKWORKS ARE ABUNDANT IN SHALE AND PHYLLITE.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No
Discovery year 1972
Discoverer Whit Delamare
Year of first production 1980

Mining district

District name Potosi District; Getchell Deposit

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Owner-Operator
    Owner Cordex; Lacana Gold; Pinson Mining Co.
    Interest 26.25
    First year 1987

Reserves and resources

  • Type In-situ
    Estimate year 1984
    Total resources 816000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.778 g/mt Gold Major 1984
  • Type In-situ
    Estimate year 1987
    Total resources 453000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 4.517 g/mt Gold Major 1987
  • Type Leaching
    Estimate year 1987
    Total resources 444000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 15.811 g/mt Gold Major 1987

Comments on the reserve resource information

  • THERE ARE RUMORS OF ADDITIONAL RESERVES IN AN EXTENSION OF ORE BODY.

Comments on the workings information

  • NUMEROUS DRILL RAODS, DRILL HOLES (ONE HOLE NOTED TO BE 205 FT DEEP), SEVERAL SMALL TEST PITS, DRILL RIG IN OPERATION 1 KM TO THE EAST, OPEN PIT.

Comments on development

  • DRILLING INDICATES 1.2 MILLION TONS OF ORE AVG. 0.074 OZ/TON AU EXISTS. TO BE OPEN-PITTED WITH A WASTE TO ORE RATIO OF 2.5:1. ORE FROM HIGHER-GRADE ZONES WILL BE SHIPPED TO THE PINSON MILL, AND THE LOWER GRADE MATERIAL WILL BE HEAP-LEACHED NEAR THE PIT SSITE. PRODUCTION OF 280,000 TONS (13,000 OZ) PER YEAR EXPECTED TO BEGIN LATE 1984. PROJECT CAME ONSTREAM AT LESS THAN THE PROJECTED $2.4 MILLION. SPRINKLING OF THE HEAPS BEGAN IN 1984.

Reference information

Bibliographic references

  • Deposit

    DECKER, D.J., 1974; MINERAL RESOURCE OWNERSHIP INVESTIGATION, NEVADA GARVEY RANCH, HUMBOLDT AND ELKO COUNTIES, NEVADA: UNPUBUBLISHED REPORT ON FILE AT NBMG, ITEVAL.

  • Deposit

    NEV. MIN ASSN. BULL. SEPT., 1979, CONSORTIUM BUDGETS $14 MILLION TO OPEN PINSON GOLD MINE.

  • Deposit

    THE NORTHERN MINER NEWSPAPER, JAN. 3, 1980, "LACANEX SUPERVISING CORDEX I SYNDICATE FEASIBILITY STUDY."

  • Deposit

    GARSIDE, L.J., 1984, NBMG FIELD EXAMINATION 19 JUNE, 1984, AND SAMPLE ANALYSIS.

  • Deposit

    CRONE, W.R., 1982, M.S. THESIS, UNIV. NEV. RENO.

  • Deposit

    CRONE, W.R., LARSEN, T.T., CARPENTER, R.H., CHAO, T.T., AND SANZOLONE, R.F., 1984, JOUR. OF GEOCHEM. EXPLOR., VOL 20, P. 161-178.

  • Deposit

    USGS, 1974, MAP GQ-1174.

  • Deposit

    THE MINING RECORD, AUG.29, 1984.

  • Deposit

    MINESEARCH ANNUAL, 1984-85, VOL VII, P.362-367, METALS ECONOMICS GROUP, BOULDER, CO.

  • Deposit

    NUMEROUS CLIPPINGS, 1982-1984.

  • Deposit

    GEOL. SOC. NEVADA, 1987, BULK MINEABLE PRECIOUS METALS SYMPOSIUM.

  • Deposit

    BONHAM, H.F., 1986, NBMG MAP 91.

  • Deposit

    BONHAM H.F., 1988, IN NBMG MI-1987.

  • Deposit

    NEVADA MININIG ASSOCIATION BULLITON, SEPT 1979, "CONSORTIUM BUDGETS $14 MILLION TO OPEN PINSON GOLD MINE."

  • Deposit

    THE NORTHERN MINER NEWSPAPER, JAN 3 1980, "LACANEX SUPERVISING CORDEX I SYNDICATE FEASIBILITY SUTDY."

  • Deposit

    GARSIDE, L.J., 1984, NBMG FIELD EXAMINATION AND SAMPLE ANALYSIS, 19 JUN 1984. #5. CRONE, W.R., LARSEN, L.T., CARPENTER, R.H., CHAO, T.T., AND SANZOLONE, R.F., 1984, JOURNAL OF GEOCHEMICAL EXPLORATION, VOL. 20, P. 161-178. #6. USGS, 1974, MAP GQ-1174. #7. CRONE, W.R., 1982, MS THESIS, UNIVERSITY OF NEVADA, RENO. #8. THE MINING RECORD, 29 AUG 1984. #9. MINESEARCH ANNUAL, 1984-85, VOL. VII, P. 362-367, METALS ECONOMICS GROUP, BOULDER, CO. #10. NUMEROUS CLIPPINGS, 1982-1984. #11. GEOLOGIC SOCIETY OF NEVADA, 1987, BULK MINEABLE PRECIOUS METALS SYMPOSIUM.

  • Production

    MINE SEARCH, ANNUAL, 1984-85, VOL VIII., P.363; PRODUCTION WAS REPORTEDLY 325000 TONS PER YEAR, REPORTED IN 1987. BONHAM, 1988.

  • Reserve-Resource

    BONHAM, 1984; MINING RECORD, 1984; GSN SYMPOSIUM, 1987.

General comments

Subject category Comment text
Deposit DEPOSIT IS SMALL, 4.5 TONS AU METAL AT PRESENT. DISSEMINATED GOLD MINERALIZATION OCCURS IN CONTORTED, FINELY LAMINATED PHYLLITE OF PREBLE FM. IN THE PIT EXAMINED AND SAMPLED, THE PHYLLITE IS LIGHT GREY, BUT FE OXIDE STAIN ZONES IRREGULAR IN SHAPE AND SEVERAL METERS WIDE CUT THE PHYLLITE. BASED ON MINING IN THE PIT, ORE MUST CONSIST OF BOTH GOSSAN-BEARING ROCK AND LIGHT GREY CONTOTED PHYLLITE. A FEW 5 X 15 CM PODS OF MILKY QUARTZ (OFTEN DRUSY), OCCUR IN THE IRON-STAINED ZONES. REPORTEDLY, TRACES OF OXIDE CU MINERALS ARE LOCALLY PRESENT. ROTARY DRILLING IN THE PREBLE ORE BODY IS ABOUT 60 M DEEP; THE HOLES ARE STOPPED WHEN THEY ENTER CARBONACEOUS, UNOXIDIZED ORE. THIS CARBONACEOUS ORE THAT HAS NOT BEEN OXIDIZED BY SUPERGENE PROCESSES IS REPORTEDLY NOT AMENABLE TO CYANDIZATION WITHOUT PRE-TREATMENT. THUS THE UNOXIDIZED ORE PROBABLY CANNOT BE MINED ECONOMICALLY AT PRESENT.
Deposit DISCOVERED IN 1972 BY WHIT DELAMARE, OFTEN LUMPED TOGETHER WITH THE PINSON DEPOSIT 12 MILES NORTH, AS THE "PINSON-PREBLE" PROPERTIES. IN 1980, AN ARTICLE STATED THAT 13,400 FT. OF DRILLING IN 40 HOLES HAS INDICATED 1.2 MILLION TONS ORE AVG. 0.074 OZ/TON AU WITH A STRIPPING RATION OF 1.5:1 ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV; 4 OTHER SRC

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1981 La Pointe, D.D. Nevada Bureau of Mines and Geology
Updater 01-NOV-1988 La Pointe, D.D. 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

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.