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Unnamed Prospects

Occurrence in Presidio county in Texas, United States with commodities Molybdenum, Silver
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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. 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 10085745
MRDS ID W701378
Record type Site
Current site name Unnamed Prospects
Alternate or previous names Unnamed Prospects Near Cerro Infiernito

Geographic coordinates

Geographic coordinates: -104.34549, 30.03382 (WGS84)
Relative position 28 MI (45 KM) SW OF MARFA

Site location context

Political divisions (FIPS codes)

Presidio(county)

Texas(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cuesta Del Burro East(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
Molybdenum Primary
Silver Primary

Materials information

Materials Type of material
Magnetite Gangue
Pyrite Gangue
Pyrrhotite Gangue
Quartz Gangue
Zircon Gangue

Alteration

  • (Local) Sericitization; Propylitic Alteration (Chlorite, Epidote, Carbonate, Pyrite)

Mineral occurrence model information

Model code 50
USGS model code 16
Deposit model name Climax Mo

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Apophysis Of Ojo Bonito Intrusion
    Rock description Apophysis Of Ojo Bonito Intrusion
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite

Nearby scientific data

(1) -104.34549, 30.03382
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Economic information

Comments on the geologic information

  • ANOMALOUS MO, ZN, CD, AND AS, AND SEVERAL FEATURES TYPICAL OF PORPHYRY-TYPE MOLYBDENUM DEPOSITS. ANOMALOUS AMOUNTS OF AG (UP TO 4 PPM) OCCUR IN QUARTZ VEINS. THE PRESENCE OF PYRRHOTITE, PYRITE, MAGNETITE, AND SECONDARY BIOTITE SUGGESTS CONDITIONS OF HIGH TEMPERATURE AND LOW SULFUR AND OXYGEN FUGACITIES DURING STOCKWORK VEINING. INTRUSIVE ROCK IS PART OF THE RESURGENT DOME OF THE INFIERNITO CALDERA.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Mining district

District name Infiernito Caldera

Land status

Ownership category Private

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 QUARTZ VEINS AND STOCKWORK VEINLETS IN PORPHYRY.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-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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