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

Sunset Claims

Occurrence in Gunnison county in Colorado, United States with commodities Thorium, Gold
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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. Geologic structures
  11. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10014388
MRDS ID D011134
Record type Site
Current site name Sunset Claims
Related records 10263679

Geographic coordinates

Geographic coordinates: -107.01479, 38.34 (WGS84)
Elevation 2752
Location accuracy 1000(meters)
Relative position 14.7 MILES S 19 W FROM GUNNISON

Site location context

Political divisions (FIPS codes)

Gunnison(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Powderhorn(quadrangle 1:24,000 scale)

Montrose(quadrangle 1:100,000 scale)

Montrose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Gunnison(hydrologic unit)

Gunnison(hydrologic accounting unit)

Gunnison(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CO)

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

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Colorado Gunnison

Public Land Survey System information

Meridian Township Range Section Fraction State
New Mexico 047N 001W 07 W2 OF SW Colorado

Comments on the location information

  • ALTHOUGH EXACT LOCATION IS UNCERTAIN, CLAIMS LIE NEAR MAIN PART OF DOMINGO DISTRICT. ELEV AND LAT-LONG GIVEN ARE FOR PROSPECTS ON TRACHYTE DIKE IN W2 SW SEC. 07. ; INFO FROM LAND.ST :1976

Commodities

Commodity Importance
Thorium Primary
Gold Tertiary

Materials information

Materials Type of material
Pyrite Ore
Thorite Ore
Hematite Gangue
Orthoclase Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Trachyte
    Rock unit name Granite Of Tolvar Peak;Trachyte And Trachyte Porphyry Dikes
    Rock description Granite Of Tolvar Peak;Trachyte And Trachyte Porphyry Dikes
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Late Cambrian
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Trachyte
    Rock unit name Dubois Greenstone--Felsite And Felsite Porphyry
    Rock description Dubois Greenstone--Felsite And Felsite Porphyry
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -107.01479, 38.34
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Gunnison Uplift, San Juan Volcanic Field
Type of structure Local
Structure description Gunnison Gold Belt, Iron Hill Alkalic Complex, Tolvar Peak Stock

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Domingo (Vulcan) District

Land status

Ownership category BLM Administrative Area

Comments on the workings information

  • SURFACE PROSPECTS

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit EXACT LOCATION AND GEOLOGY OF DEPOSIT ARE UNKNOWN, BUT ON BASIS OF ASSUMED LOCATION, DEPOSIT COULD BE TRACHYTE DIKE TRENDING N 63 W AND CUTTING APOPHYSIS OF TOLVAR PEAK GRANITE THAT HAS INTRUDED OLDER DUBOIS GREENSTONE ALONG ITS GENERAL FOLIATION TREND OF EAST-WEST. TRACHYTE DIKES IN THIS AREA ARE ONE OF FOUR ENVIRONMENTS OF TH OCCURRENCE KNOWN IN POWDERHORN-IRON HILL AREA AND ARE PROBABLY RELATED TO EMPLACEMENT OF LATE PRECAMBRIAN SYENITES NORTH AND WEST OF IRON HILL AND OF YOUNGER LATE PRECAMBRIAN OR CAMBRIAN CARBONATITES AT IRON HILL. DIKES FOLLOW LOCAL JOINTING IN COUNTRY ROCK AND ARE COMPOSED OF LATH-SHAPED ORTHOCLASE PHENOCRYSTS IN TRACHYTIC, APHANITIC GROUNDMASS OF ORTHOCLASE MICROLITES. RADIOACTIVITY IS CONCENTRATED IN HEMATITE PSEUDOMORPHS AFTER PYRITE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1984 Schwochow, Stephen D. Colorado 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 Colorado resources

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