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Trill Bird Deposit

Occurrence in Conejos county in Colorado, United States with commodities Gold, Copper
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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. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Mining district
  17. Land status
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10087905
MRDS ID D010734
Record type Site
Current site name Trill Bird Deposit

Geographic coordinates

Geographic coordinates: -106.60477, 37.34446 (WGS84)
Elevation 3097
Location accuracy 500(meters)
Relative position 4.6 MILES S 58 W FROM PLATORO

Site location context

Political divisions (FIPS codes)

Conejos(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Platoro(quadrangle 1:24,000 scale)

Antonito(quadrangle 1:100,000 scale)

Durango(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Conejos(hydrologic unit)

Rio Grande Headwaters(hydrologic accounting unit)

Rio Grande Headwaters(hydrologic subregion)

Rio Grande(hydrologic region)

Federal lands

Rio Grande National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Colorado Conejos

Public Land Survey System information

Meridian Township Range Section Fraction State
New Mexico 036N;036N 003E;004E 25;31 E2 (25); W2 (05) Colorado

Comments on the location information

  • ALONG ADAMS FORK WEST OF UPPER PLATORO RESERVOIR. ELEV AND LAT-LONG GIVEN ARE FOR CONTACT BETWEEN CONEJOS BRECCIA UNIT AND FLOWS IN E2 SEC. 25 (SECTIONS PROJECTED INTO UNSURVEYED AREA). ; INFO FROM LAND.ST :1975

Commodities

Commodity Importance
Gold Tertiary
Copper Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Pyrite Ore
Calcite Gangue
Goethite Gangue

Alteration

  • (Local) Alteration Generally Argillic But Local Silicic And Propylitic Occur; Fe Oxidation (Hematite Staining)

Analytical data

Result 0.002 TO 10 OZ/TON AU, UP TO 210 PPM CU

Mineral occurrence model information

Model code 154
USGS model code 25e
Deposit model name Epithermal quartz-alunite Au
Mark3 model number 38

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyodacite
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Intrusive Rocks--Andesite Porphyry
    Rock description Intrusive Rocks--Andesite Porphyry
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyodacite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Conejos Formation--Cone Breccias;Conejos Formation--Vent Facies
    Rock description Conejos Formation--Cone Breccias;Conejos Formation--Vent Facies

Nearby scientific data

(1) -106.60477, 37.34446
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description San Juan Volcanic Field
Type of structure Local
Structure description Platoro Caldera (Rim)

Ore body information

  • Thickness 60.05M
    Length 600.46M
    Width 179.83M

Controls for ore emplacement

  • Caldera Rim Fault And Fractures Cutting Precaldera Porous Volcanic Breccias

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1971
Discoverer W.H. Bird

Mining district

District name Ute (Platoro) District

Land status

Ownership category Federal

Reference information

Bibliographic references

  • Deposit

    BIRD, W.H., 1973, THE DEVELOPMENT OF THE SOUTHERN PORTION OF THE PLATORO CALDERA COMPLEX AND ITS RELATED MINERAL DEPOSITS, SOUTHEAST SAN JUAN MOUNTAINS, COLORADO: COLORADO SCHOOL OF MINTE THESIS T-1440.

  • Deposit

    LIPMAN, P.W., 1974, GEOLOGIC MAP OF THE PLATORO CALDERA AREA, SOUTHEASTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MPA I-828.

General comments

Subject category Comment text
Deposit DEPOSIT IS DISSEMINATED AU AND MEGASCOPIC PYRITE AND CHALCOPYRITE IN PRECALDERA CONEJOS FM BRECCIAS JUST OUTSIDE CALDERA RIM FAULT. MINERALIZING SOLUTIONS ROSE THROUGH CALDERA RIM FAULT AND ASSOCIATED FRACTURES AND INTO POROUS BRECCIAS. CONEJOS SEQUENCE CUT BY NE-TRENDING ANDESITE PORPHYRY DIKES. PYRITE LOCALIZED IN BRECCIA FRAGMENTS AND MATRIX AND COMPRISES UP TO 5% OF ROCK. ASSAYS INDICATE DISSEMINATED AU ALTHOUGH MEGASCOPIC CHALCOPYRITE AND NATIVE AU FOUND. BIRD INTERPRETS ORIGIN AS LOW-TEMPERATURE GASEOUS TRANSPORT, SIMILAR TO VERA BRECCIA PIPE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-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.