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  3. Mineral Resource Data System (MRDS)

Dewey Group

Past Producer in Grand county in Utah, United States with commodities Gold, Silver, Copper, Fluorine-Fluorite
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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. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10078553
MRDS ID W026935
Record type Site
Current site name Dewey Group

Geographic coordinates

Geographic coordinates: -109.26319, 38.53416 (WGS84)
Elevation 3475
Relative position 2000 FT WEST OF GREEN MTN.

Site location context

Political divisions (FIPS codes)

Grand(county)

Utah(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Warner Lake(quadrangle 1:24,000 scale)

Moab(quadrangle 1:100,000 scale)

Moab(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Colorado-Kane Springs(hydrologic unit)

Upper Colorado-Dolores(hydrologic accounting unit)

Upper Colorado-Dolores(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

Manti-La Sal National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Utah Grand

Public Land Survey System information

Meridian Township Range Section Fraction State
Salt Lake 026S 024E 23 Utah

Comments on the location information

  • SECTION SUBDIVISION: NE 1/4 NW 1/4 OF SEC. 25

Commodities

Commodity Importance
Gold Primary
Silver Primary
Copper Secondary
Fluorine-Fluorite Critical Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Chrysocolla Ore
Fluorite Ore
Malachite Ore
Calcite Gangue
Chalcedony Gangue
Hedenbergite Gangue
Hematite Gangue
Pyrite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Syenite
    Rock unit name North La Sal Stock
    Rock description North La Sal Stock
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -109.26319, 38.53416
ListMap

Economic information

Ore body information

  • General form TABULAR
    Strike N 10 DEG E
    Dip 65 DEG W
    Thickness 0.61M
    Length 106.68M
    Width 30.48M
    Depth to top 45.72M
    Depth to bottom 91.44M

Controls for ore emplacement

  • Joints

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No
Discovery year 1898

Mining district

District name La Sal Mtn.

Land status

Ownership category National Forest

Workings at the site

  • Type of workings Unknown
    Length 193.55M
    Overall depth 76.2M

Comments on the workings information

  • THREE ADITS, THE MAIN ADIT IS PARTLY CAVED AND INACCESSIBLE. THE OTHER TWO ARE CAVED AT PORTAL

Reference information

Bibliographic references

  • Deposit

    HUNT, C.B., 1958 , STRUCTURE AND IGNEOUS ROCKS OF THE LA SAL MTNS., UT.: USGS PROF PAPER 294-I

  • Deposit

    1976 RECON UTAH GEOL. & MIN SURVEY - BULLETIN 11

  • Reserve-Resource

    MC CARTHY, B.M., 1977

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1977 Mc Carthy, Blair M. Bureau of Land Management

Beyond USGS

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

Maps centered on this site