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Mammoth Prospect

Occurrence in Presidio county in Texas, United States with commodity Uranium
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Land status
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10085820
MRDS ID W701477
Record type Site
Current site name Mammoth Prospect

Geographic coordinates

Geographic coordinates: -104.80495, 30.44713 (WGS84)
Relative position 40 MI (65 KM) S OF VAN HORN

Site location context

Political divisions (FIPS codes)

Presidio(county)

Texas(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Quinn Creek(quadrangle 1:24,000 scale)

Marfa(quadrangle 1:100,000 scale)

Marfa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Cibolo-Red Light(hydrologic unit)

Rio Grande-Amistad(hydrologic accounting unit)

Rio Grande-Amistad(hydrologic subregion)

Rio Grande(hydrologic region)

Geographic areas

Country State County
United States Texas Presidio

Commodities

Commodity Importance
Uranium Primary

Materials information

Materials Type of material
Carnotite Ore
Calcite Gangue
Chalcedony Gangue
Feldspar Gangue
Opal Gangue
Quartz Gangue

Alteration

  • (Local) Bleaching (Removal Of Iron); Possibly Kaolinitization

Mineral occurrence model information

Model code 155
USGS model code 25f
Deposit model name Volcanogenic U

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name Buckshot Ignimbrite
    Rock description Buckshot Ignimbrite
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite

Nearby scientific data

(1) -104.80495, 30.44713
ListMap

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Land status

Ownership category Private

Comments on the reserve resource information

  • RESOURCES AND GRADE: REPORTED AVERAGE GRADES IN THE RANGE OF 0.1 TO 0.3% U3O8, BUT MINEABLE RESERVES HAVE NOT BEEN DELINEATED.

Comments on development

  • DATES OF ACTIVITY: INTERMITTENT EXPLORATION 1954-1981.

Reference information

Bibliographic references

  • Deposit

    PRICE, J. G., HENRY, C. D., AND STANDEN, A. R., 1983, ANNOTATED BIBLIOGRAPHY OF MINERAL DEPOSITS IN TRANS-PECOS TEXAS: BUREAU OF ECONOMIC GEOLOGY (TEXAS), MINERAL RESOURCE CIRCULAR NO. 73, 108 P

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit HENRY AND OTHERS (1980) NOTED THAT BETA-URANOPHANE OCCURS IN CAVITIES IN DEVITRIFICATION SPHERES, IN FRACTURES IN ROCK FRAGMENTS, AND IN FRACTURES IN THE BUCKSHOT IGNIMBRITE. NYE (1957) PROPOSED THREE MODES OF ORIGIN: (1) CONCENTRATION OF URANIUM IN VESICLES BY LATE-STAGE VOLATILE COMPONENTS OF THE MAGMA, (2) GROUNDWATER LEACHING FROM THE IGNIMBRITE AND OVERLYING TUFFACEOUS SEDIMENTS AND RECONCENTRATION IN THE IGNIMBRITE, AND (3) HYDROTHERMAL MINERALIZATION. HENRY AND OTHERS (1980) AND HENRY AND DUEX (1981) SUGGESTED THAT HYDROGEN SULFIDE-RICH WATERS FROM DEPTH ENTERED THE BUCKSHOT IGNIMBRITE AND PRECIPITATED PYRITE BEFORE URANIUM DEPOSITION BY AN OXIDATION-REDUCTION MECHANISM.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1991 Paidakovich, Matthew E. U.S. Geological Survey
Updater 01-MAR-1993 Long, Keith R. U.S. Geological Survey

Beyond USGS

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

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