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Unnamed Pegmatite

Occurrence in Gunnison county in Colorado, United States with commodities Molybdenum, Iron
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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 10014391
MRDS ID D011138
Record type Site
Current site name Unnamed Pegmatite

Geographic coordinates

Geographic coordinates: -107.13785, 38.3925 (WGS84)
Elevation 2492
Location accuracy 1000(meters)
Relative position 15.4 MILES S 48 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

Carpenter Ridge(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 048N 002W 19 Colorado

Comments on the location information

  • EXACT LOCATION UNCERTAIN, HUNTER (1925) GIVES LOCATION AS ABOVE STREAM CROSSING ON WILDCAT GULCH ON WEST BORDER OF AUGITE SYENITE BODY. NEW BASE MAP SHOWS WOLF CREEK AND WILDCAT GULCH REVERSED FROM THAT ON HUNTER'S MAP. SYENITE BODY LIES ON WOLF CREEK ABOUT 1.7 MILES EAST OF CONFLUENCE WITH CEBOLLA CREEK. GEOLOGIC MAP SHOWS NO PEGMATITE IN IMMEDIATE AREA. ELEV AND LAT-LONG GIVEN ARE FOR POINT ABOVE (SOUTH OF) TRAIL ACROSS WOLF CREEK AND NEAR CONTACT OF MAIN SYENITE MASS WITH SMALL PERIPHERAL BODY OF MELASYENITE IN SE SW SE SEC. 19. ; INFO FROM LAND.ST :1975

Commodities

Commodity Importance
Molybdenum Tertiary
Iron Tertiary

Materials information

Materials Type of material
Molybdenite Ore
Hornblende Gangue
Microcline Gangue
Quartz Gangue
Sphene Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Syenite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
    Rock unit name Pegmatite And Granite Dikes
    Rock description Pegmatite And Granite Dikes
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Plutonic Rock > Pegmatite
    Rock unit name Black Canyon Schist;Syenite And Related Rocks
    Rock description Black Canyon Schist;Syenite And Related Rocks
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -107.13785, 38.3925
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, Unnamed Fault, 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 Wolf Creek Area

Land status

Ownership category BLM Administrative Area

Reference information

Bibliographic references

  • Deposit

    HUNTER, J.F., 1925, PRE-CAMBRIAN ROCKS OF GUNNISON RIVER, COLORADO: USGS BULL. 777, P. 79.

  • Deposit

    HEDLUND, D.C., AND OLSON, J.C., 1973, GEOLOGIC MAP OF THE CARPENTER RIDGE QUADRANGLE, GUNNISON COUNTY, COLORADO: USGS MAP GQ-1070.

General comments

Subject category Comment text
Deposit SMALL STOCK OF PORPHYRITIC AUGITE SYENITE INTRUDES COMPLEX OF SCHIST AND GNEISS CONTAINING LAYERS OF AMPHIBOLITE AND HORNBLENDE SCHIST WITH BEDDING AND FOLIATION TRENDING GENERALLY EAST-WEST, DIPPING SOUTH. SYENITE INTRUDED BY GRANITE DIKES, QUARTZ VEINS, AND LEUCOSYENITE. ON PERIPHERY OF MAIN MASS ARE SMALL BODIES OF APPARENTLY OLDER MELASYENITE. NW OF STOCK IS SWARM OF NE-TRENDING GRANITE-QUARTZ MONZONITE DIKES. NORTH END OF STOCK IS OFFSET BY FAULT TRENDING GENERALLY N 35 E AND WITH APPARENT RIGHT LATERAL MOVEMENT. ALTHOUGH NO PEGMATITES WERE MAPPED IN IMMEDIATE AREA (HEDLUND AND OLSON, 1973) HUNTER (1925) DESCRIBED A 2-FT-WIDE DIKE ON WEST BORDER OF STOCK CONSISTING OF QUARTZ, MICROCLINE, AND LONG SLENDER HORNBLENDE CRYSTALS, WITH ABUNDANT SPECULAR HEMATITE. MOLYBDENITE IS ASSOCIATED WITH HORNBLENDE AND OCCURS ALONG CRACKS AND JOINTS IN QUARTZ.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1983 Schwochow, Stephen D. Colorado Geological Survey

Beyond USGS

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

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.