1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Firefly, Pigmay

Past Producer in San Juan county in Utah, United States with commodities Uranium, Vanadium
Map
XML
JSON
KML
B
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. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10015129
MRDS ID DB00179
Record type Site
Current site name Firefly, Pigmay

Geographic coordinates

Geographic coordinates: -109.09875, 38.33193 (WGS84)
Elevation 2048
Relative position 2.13 MILES WNW FROM HIGHWAY 46 CROSSING UTAH - COLORADO STATE LINE.

Site location context

Political divisions (FIPS codes)

San Juan(county)

Utah(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ray Mesa(quadrangle 1:24,000 scale)

La Sal(quadrangle 1:100,000 scale)

Moab(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Dolores(hydrologic unit)

Upper Colorado-Dolores(hydrologic accounting unit)

Upper Colorado-Dolores(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Utah San Juan

Public Land Survey System information

Meridian Township Range Section Fraction State
Salt Lake 028S 026E 30 Utah

Commodities

Commodity Importance
Uranium Primary
Vanadium Critical Secondary

Materials information

Materials Type of material
Carnotite Ore
Coffinite Ore
Montroseite Ore
Torbernite Ore
Tyuyamunite Ore
Uraninite Ore
Uranophane Ore
Galena Gangue
Gypsum Gangue
Limonite Gangue
Pyrite Gangue
Sphalerite Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Mudstone
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Salt Wash Member of Morrison Formation
    Rock description Salt Wash Member of Morrison Formation

Economic information

Geologic structures

Type of structure Local
Structure description La Sal Creek Syncline

Ore body information

  • General form LENS, TABULAR, IRREGULAR,
    Strike E - W
    Dip 6 DEG E
    Thickness 1.83M
    Length 91.44M
    Width 60.96M
    Depth to top 24.38M
    Depth to bottom 91.44M

Controls for ore emplacement

  • Paleochannels, Scour Fill

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Large
Significant No

Mining district

District name Paradox District, La Sal Area

Land status

Ownership category National Forest

Workings at the site

  • Type of workings Underground
    Length 4572M
    Overall depth 91.44M

Comments on the workings information

  • CONNECTED BY DRIFT WITH LITTLE DON MINE IN TWO MILE CANYON, ALSO GRAY DAUN MINE.

Comments on development

  • (F) DISCOVERED BY EXPLORATION DRILLING PROGRAM

Reference information

General comments

Subject category Comment text
Deposit MUCH OF WORKINGS CAVED AND FLOODED.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1977 Jones, Harold H. 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