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  3. Mineral Resource Data System (MRDS)

Douglas Group

Past Producer in Mineral county in Nevada, United States with commodities Gold, Silver, Lead
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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. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10045304
MRDS ID M233004
Record type Site
Current site name Douglas Group
Alternate or previous names Incluede Grassi, Mary, Hardluck, Orphan Boy, Juniper, Snowball, Gem,, Pepper, Roosevelt, Little Chief, Bounce, Oriole, New Party Veins, Gold Range District.

Geographic coordinates

Geographic coordinates: -118.19623, 38.33882 (WGS84)
Location accuracy 100(meters)
Relative position Chose Central Point

Site location context

Political divisions (FIPS codes)

Mineral(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Camp Douglas(quadrangle 1:24,000 scale)

Excelsior Mountains(quadrangle 1:100,000 scale)

Walker Lake(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Fish Lake-Soda Spring Valleys(hydrologic unit)

Central Nevada Desert Basins(hydrologic accounting unit)

Central Nevada Desert Basins(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 Mineral

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 006N 034E Nevada

Comments on the location information

  • INFO FROM LAND.ST :(1972); 1:24000 QUADRANGLE IS A 1967) EDITION

Commodities

Commodity Importance
Gold Primary
Silver Primary
Lead Tertiary

Materials information

Materials Type of material
Galena Ore
Silver Ore
Tetrahedrite Ore
Calcite Gangue
Quartz Gangue

Alteration

  • (Local) Silicification, Argillization, Fe-Staining

Mineral occurrence model information

Model code 150
USGS model code 25c
Deposit model name Epithermal vein, Comstock
Mark3 model number 16

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Andesite
    Rock description Andesite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Excelsior;Dunlap
    Rock description Excelsior;Dunlap

Nearby scientific data

(1) -118.19623, 38.33882
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Ne-Trending Faults
Type of structure Local
Structure description North-Northwest-Trending Fault System Folds

Ore body information

  • General form LINEAR
    Thickness 3.96M

Controls for ore emplacement

  • Crushed And Brecciated Andesite

Comments on the geologic information

  • THE VEINS HAVE CLEAN, SHARP CONTACTS WITH CLASTIC ROCKS OF THE DUNLAP AND EXCELSIOR FORMATIONS. THE VOLCANIC ROCKS TO THE EAST, CONTAINING FREE GOLD, ARE HYDROTHERMALLY ALTERED, CONTAIN QUARTZ MASSES AND ARE POSSIBLY POST-ESMERALDA IN AGE

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1893
Discoverer T. Pepper, E. Grass;, D.J. Robb

Mining district

District name Silver Star District

Land status

Ownership category BLM Administrative Area

Comments on the production information

  • $500,000(1893-1903). TOTAL PRODUCTION ABOUT $2,000,000.

Comments on the workings information

  • NUMEROUS ADITS AND SHAFTS ON THE SEVERAL VEINS. PRINCIPAL DEVELOPMENT IS ON THEBOUNCE VEIN.

Comments on development

  • MINING ACTIVITY CENTERED IN THE CAMPT DOUGLAS AREA BETWEEN 1893 AND 1903.

Reference information

Bibliographic references

  • Deposit

    ROSS, D.C., 1961, GEOLOGY AND MINERAL DEPOSITS OF MINERAL COUNTY, NEVADA: NBMG BULL.58

  • Deposit

    HILL, J.M., 1915, SOME MINING DISTRICTS IN NORTHEASTERN CALIFORNIA AND NORTHWESTERN NEVADA: USGS BULL. 594.

  • Deposit

    VANDERBURG, W.O., 1937, RECONNAISSANCE OF MINING DISTRICTS IN MINERAL COUNTY, NEVADA: U.S. BUREAU OF MINES INF. CIRC. 6941, 79P.

  • Deposit

    FERGUSON, H.G., MULLER, S.W., AND CATHCART, S.H., 1954, GEOLOGIC MAP OF THE MINA QUADRANGLE, NEVADA: USGS GEOL. QUAD MAP SERIES, GQ 45.

  • Deposit

    JARSIDE, L.J., 1979, GEOLOGY OF THE CAMP DOUGLAS QUADRANGLE, MINERAL COUNTY, NEVADA(UNPUB.): NBMG FILES

  • Production

    ROSS, D.C., 1961, TABLE 6.7

General comments

Subject category Comment text
Deposit EAST-TRENDING VEINS FROM A FRACTION OF AN INCH TO 13 FT THICK (BOUNCE, SNOW BALL, JUPITER MARY VEINS) IN ANOTHER TYPE (ROOSEVELT), FREE GOLD IS PRESENT IN CRUSHED, HYDROTHERMALLY ALTERED ANDESITIC ROCK.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-81 Flynn, Patricia D. (Tingley, J. V.) Nevada Bureau of Mines and Geology

Beyond USGS

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

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.