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Seneca Tunnel

Prospect in Custer 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. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. Reporter information

Geologic information

Identification information

Deposit ID 10012307
MRDS ID D007863
Record type Site
Current site name Seneca Tunnel

Geographic coordinates

Point of reference Pit
Geographic coordinates: -105.34057, 38.11362 (WGS84)
Elevation 2835
Location accuracy 10(meters)
Relative position 1.1 MILES N 08 W FROM ROSITA, CO.

Site location context

Political divisions (FIPS codes)

Custer(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rosita(quadrangle 1:24,000 scale)

Canon City(quadrangle 1:100,000 scale)

Pueblo(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Arkansas Headwaters(hydrologic unit)

Upper Arkansas(hydrologic accounting unit)

Upper Arkansas(hydrologic subregion)

Arkansas-White-Red(hydrologic region)

Geographic areas

Country State County
United States Colorado Custer

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 022S 071W 20 SE OF SE OF SE Colorado

Comments on the location information

  • EAST FLANK OF MT ROBINSON AT HEAD OF UNNAMED TRIBUTARY OF POVERTY GULCH ; INFO FROM LAND.ST :(1976)

Commodities

Commodity Importance
Silver Primary
Gold Secondary

Materials information

Materials Type of material
Pyrite Ore
Galena Ore
Quartz Gangue

Alteration

  • (Local) Strongly Argillized; Bleached

Mineral occurrence model information

Model code 82
USGS model code 22
Deposit model name Epithermal veins

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Miocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Trachyte
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Rosita Andesite;Game Ridge Trachyte, Rhyolite Of Rosita Volcano
    Rock description Rosita Andesite;Game Ridge Trachyte, Rhyolite Of Rosita Volcano
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)

Nearby scientific data

Pit (1) -105.34057, 38.11362
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Rosita Volcanic Center, Wet Mtns
Type of structure Local
Structure description Fault Trending Northeast

Controls for ore emplacement

  • Fault Trending Northeast, Trachyte Dike (?)

Economic information about the deposit and operations

Operation type Underground
Development status Prospect
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1895

Mining district

District name Rosita

Land status

Ownership category Federal

Workings at the site

  • Type of workings Underground
    Length 182.88M
    Overall length 182.88M
    Overall width 1.52M

Comments on the workings information

  • TUNNEL 600 FT LONG; AT 470 FT CUTS 12 FT TRACHYTE DIKE; AT 507 FT CUTS RHYOLITE DIKE; FOLLOWS STRIKE OF VEIN

Reference information

Bibliographic references

  • Deposit

    CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.

  • Deposit

    SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1981 Collins, Donna B. 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.