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

Excelsior Tunnel

Prospect in Costilla county in Colorado, United States with commodities Silver, 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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Ownership information
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10011666
MRDS ID D006738
Record type Site
Current site name Excelsior Tunnel
Alternate or previous names Last Chance claim

Geographic coordinates

Point of reference Approximate
Geographic coordinates: -105.27, 37.61446 (WGS84)
Elevation 3121
Location accuracy 50(meters)
Relative position 4.15 MILES N 13 E OF RUSSELL

Site location context

Political divisions (FIPS codes)

Costilla(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Russell(quadrangle 1:24,000 scale)

Blanca Peak(quadrangle 1:100,000 scale)

Trinidad(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alamosa-Trinchera(hydrologic unit)

Rio Grande Headwaters(hydrologic accounting unit)

Rio Grande Headwaters(hydrologic subregion)

Rio Grande(hydrologic region)

Geographic areas

Country State County
United States Colorado Costilla

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 028S 070W 18 NW OF SW Colorado

Comments on the location information

  • ALTHOUGH DISTRICT ACTUALLY IS IN UNSURVEYED PRIVATE LAND GRANT, SECTIONS REPORTED ARE BASED ON PATTON AND OTHERS (1910) MAP RATHER THAN PROJECTIONS FROM ADJACENT QUADS. LAT-LONG AND ELEVATIONS DETERMINED FROM TOPO QUAD. MINE OR CLAIM LIES 800 FT DUE WEST OF SUMMIT OF GRAYBACK MTN. ; INFO FROM LAND.ST :(1975)

Commodities

Commodity Importance
Silver Primary
Gold Secondary

Materials information

Materials Type of material
Hematite Ore
Calcite Gangue

Mineral occurrence model information

Model code 72
USGS model code 19a
Deposit model name Polymetallic replacement
Mark3 model number 47

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Monzonite
    Rock unit name Monzonite Porphyry
    Rock description Monzonite Porphyry
    Stratigraphic age (youngest) Pennsylvanian
    Stratigraphic age (youngest) Pennsylvanian
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Minturn Formation
    Rock description Minturn Formation

Nearby scientific data

Approximate (1) -105.27, 37.61446
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Sierra Blanca Massif, Ft. Garland Embayment
Type of structure Local
Structure description Vega Cr. Anticline, Wagon Mesa Fault

Ore body information

  • Dip 90
    Width 0.61M

Economic information about the deposit and operations

Operation type Underground
Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Grayback (Russell) District

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Trinchera (Estate)
    First year 1910

Comments on the workings information

  • TWO ADITS; LOWER ADIT DRIVEN 250 FT AT S 50 E

Reference information

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-81 Schwochow, Stephen D. Colorado Geological Survey
Updater 01-MAY-83 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.