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Combined Metals Reduction Co No. 1 Shaft

Past Producer in Lincoln county in Nevada, United States with commodities Silver, Lead, Zinc, Gold, Copper, Manganese, Arsenic, Antimony, Tungsten
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  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. Production statistics
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10037336
MRDS ID M032013
Record type Site
Current site name Combined Metals Reduction Co No. 1 Shaft
Alternate or previous names Raymond and Ely No 1, Yz Mine, Pioche Consolidated Mining Co 1880's, Panaca Mine, Lightner Shaft ?, No 1 Mine, NBMG Sample Site 1428.
Related records 10222350, 10270978

Geographic coordinates

Geographic coordinates: -114.4639, 37.92218 (WGS84)
Elevation 1934
Relative position WEST EDGE OF THE TOWN OF PIOCHE

Site location context

Political divisions (FIPS codes)

Lincoln(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Pioche(quadrangle 1:24,000 scale)

Caliente(quadrangle 1:100,000 scale)

Caliente(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Meadow Valley Wash(hydrologic unit)

Lower Colorado-Lake Mead(hydrologic accounting unit)

Lower Colorado-Lake Mead(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Nevada Lincoln

Public Land Survey System information

Meridian Township Range Section Fraction State
01N 67E 22 SE OF SW Nevada

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Primary
Gold Secondary
Copper Secondary
Manganese Critical Tertiary
Arsenic Critical Tertiary
Antimony Critical Tertiary
Tungsten Critical Tertiary

Comments on the commodity information

  • THE ORE MINED WAS OF VERY CONSTANT COMPOSITION.

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Proustite Ore
Pyrargyrite Ore
Sphalerite Ore
Pyrite Gangue

Analytical data

Result SAMPLE 1428 CONTAINS 10 % FE, GREATER THAN 5000 PPM MN, 100 PPM AG, 1500 PPM AS, 150 PPM BA, 300 PPM CD, 300 PPM CU, 10000 PPM PB, 200 PPM SB, 50 PPM W, GREATER THAN 10000 PPM ZN.

Mineral occurrence model information

Model code 72
USGS model code 19a
Deposit model name Polymetallic replacement
Mark3 model number 47

Host and associated rocks

  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock unit name Pioche Shale, Combined Metals Member
    Rock description Pioche Shale, Combined Metals Member
    Stratigraphic age (youngest) Late Cambrian
    Stratigraphic age (youngest) Late Cambrian
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Pioche Shale, Combined Metals Member
    Rock description Pioche Shale, Combined Metals Member

Nearby scientific data

(1) -114.4639, 37.92218
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Area Completely Faulted

Ore body information

  • General form TABULAR

Controls for ore emplacement

  • Greenwood Fissure

Comments on the geologic information

  • BEDDED ORE 200 FT. ON EITHER SIDE OF THE GREENWOOD FISSURE; RAYMOND AND ELY VEIN IN THE PROSPECT MOUNTAIN QUARTZITE STRIKE PARALLEL TO THE GREENWOOD FISSURE; GREENWOOD ORE CHIEFLY IN PIOCHE SHALE. THE BLACK LEDGE VEIN, OF QUARTZ AND SPHALERITE, ALSO MINED, WITH 12-20% ZN AND 5-21 OZ AG/TN. ARENACEOUS SHALE WITH ABUNDANT MUSCOVITE. COMBINED METALS MEMBER OF THE PIOCHE SHALE IS THE HOST ROCK FOR THE REPLACEMENT OREBODIES. IT CONSISTS OF 3 PARTS: (1) A LOWER 3 FT OF MASSIVE LIMESTONE (2) A MIDDLE 3-FT THICK CALCAREOUS SANDSTONE (WHICH IN THE OREBODY IS UNREPLACED) AND (3) AN UPPER 30-FT LAYER OF THIN-BEDDED NODULAR LIMESTONES, USUALLY ONLY 2-3 INCHES THICK AND SO NODULAR THAT THEY LOOK LIKE "BEDS OF FLATTENED POTATOES". THE NODULES ARE COATED WITH A THIN BLACK CARBONACEOUS SKIN. THE PIOCHE SHALE BELT TRENDS NW BETWEEN 2 FAULTS.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant No
Discoverer John H. Ely And W. H. Raymond; Rediscovered By Mr Greenwood.

Mining district

District name Pioche District District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Combined Metals Reduction Co. (Royalty Basis)
    First year 1932
  • Type Owner
    Owner Amalgamated Pioche Mines And Smelter Corp.
    First year 1932

Production statistics

  • Year 1926
    Period 1924-1926
    Material ORE
    Accuracy Estimate
    Description Cp_Grade: ^10-20% Zn 6-8.5 Oz Ag/Ton 6.8% Pb .04 Oz Au/Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Lead Lead 1g/mt
    Minor Ore Silver Silver 205g/mt
    Major Ore Zinc Zinc 15wt-pct

Comments on the production information

  • TOTAL PRODUCTION FROM 1917 TO 1960 INCLUDES CASELTON MINE AND NO. 1 EXACT TOTAL PRODUCTION UNKNOWN.

Workings at the site

  • Type of workings Underground
    Overall depth 457.2M

Comments on development

  • MOST PRODUCTIVE MINE IN PIOCHE DISTRICT. CMRC BUILT MILL AT BAUER UTAH IN 1923 TO MILL THE ORE UNTIL THE CASELTON MILL WAS BUILT IN 1941. IN 1958 AND 1959, THE YZ MINE, OPERATING THROUGH THE NO 1 SHAFT, WAS THE MAIN PRODUCING MINE IN THE DISTRICT, PRODUCING ORE FROM SILVER VEINS IN THE QUARTZITE.

Reference information

Bibliographic references

  • Deposit

    TSCHANZ, C.M., AND PAMPEYAN, E.H., 1970, GEOLOGY AND MINERAL DEPOSITS OF LINCOLN CO. NEVADA. NEVADA BUR. OF MINES, BULL 73 P.

  • Deposit

    WESTGATE, L.G. AND KNOPF, A., 1932, GEOLOGY AND ORE DEPOSITS OF THE PIOCHE DISTRICT, NEVADA. USGS PROF. PAPER 171 P.

  • Deposit

    HILL, J.M., 1916, NOTES ON SOME MINING DISTRICTS IN EASTERN NEVADA USGS BULL 648 P.

  • Deposit

    COUCH, B.F., CARPENTER, J.A., 1943, NEVADAS METAL AND MINERAL PRODUCTION (1859-1940, INCLUSIVE). UNIV. OF NEVADA BULL 38, P. 85-89

  • Deposit

    ANDERSON, J. C., 1922, ENG. AND MIN. JOUR., VOL. 113.

  • Deposit

    DEAN, R. L., APR 1943, MIN CONGR JOUR, P. 18-22; MAY, 1943, P. 54-55

  • Deposit

    SMITH, P- AND BENTZ, J., 1983, FIELD EXAMINATION REPORT, AUG. 24, 1983

  • Deposit

    ABBOTT, J. W., 1907, MIN AND SCI PRESS.

  • Production

    TSCHANZ AND PAMPEYAN, 1970

General comments

Subject category Comment text
Deposit UNDERLYING QUARTZITE HAS BEEN IRREGULARLY REPLACED BY PYRITE AND SPHALERITE. ORE IS UNOXIDIZED. THE RAYMOND AND ELY VEIN SYSTEM CONTAINING HIGH-GRADE PB-AG ORE MINED IN THE 1870'S, SPLITS EASTWARD INTO TWO BRANCHES: THE MEADOW VALLEY VEIN AND THE BURKE VEIN. THE LARGEST AND RICHEST ORE SHOOT OCCURRED IN THE RAYMOND AND ELY VEIN JUST BELOW THE PIOCHE SHALE WITHIN ABOUT 400 FT OF THE YUBA DIKE.
Deposit THE COMPLEX SULFIDE ORE WAS OF NO VALUE UNTIL SELECTIVE FLOTATION WAS INVENTED. THE MAIN OREBODY IS THE RESULT OF SELECTED REPLACEMENT OF THE COMBINED METALS LIMESTONE ONLY WHERE THE LIMESTONE IS INTERSECTED BY A STEEPLY-DIPPING FISSURE (THE GREENDWOOD FISSURE). ORE HAS BEEN OFFSET BY MANY CROSS-FAULTS. THE GREENWOOD FISSURE IS A FAULT OF SLIGHT DISPLACEMENT, USUALLY EXPRESSED AS A THIN GOUGE SEAM BUT MAY BE UP TO 5 FT THICK. IT TRENDS N70E, DIPS 65-70N, NEARLY PARALLELLING THE RAYMOND AND ELY VEIN, WHICH DIPS 75S. THE MAIN OREBODY IN THE NO. 1 MINE IS A TABULAR MASS OF SULFIDES EXTENDING LATERALLY INTO THE LIMESTONE LAYER, THICKEST (30-40 FT) ADJACENT TO THE GREENWOOD FISSURE, AND TAPERING DOWN AWAY FROM IT. ORE OF THE UPPER BED PRESERVES THE NODULAR CHARACTER OF THE LIMESTONE HOST. ORE IS MASSIVE SULFIDE CONSISTING OF ABOUT 60% PYRITE, 22% SPHALERITE, 8% GALENA, MINOR CHALCOPYRITE AND PRACTICALLY NO GANGUE MINERALS. LOWER BED ORE IS MASSIVE WITH AN IRREGULAR BOTTOM CONTACT, AS THE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1979 Harner, Joy L. (Roberts, Ralph J.) U.S. Geological Survey
Updater 01-SEP-1984 La Pointe, D.D. (Tingley, J.V.) U.S. Geological Survey

Beyond USGS

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

Maps centered on this site

Authoritative Nevada resources

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