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Transylvania Tunnel

Past Producer in Custer county in Colorado, United States with commodities Silver, Lead, Zinc
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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. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10012314
MRDS ID D007870
Record type Site
Current site name Transylvania Tunnel

Geographic coordinates

Geographic coordinates: -105.33779, 38.10557 (WGS84)
Elevation 2850
Relative position 0.6 MILE N 22 E 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)

Federal lands

Bureau of Land Management(Bureau of Land Management CO)

Bureau of Land Management CO BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Colorado Custer

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 022S 071W 28 NW OF NE OF SW Colorado

Comments on the location information

  • SE SLOPE OF POCAHONTAS HILL ; INFO FROM LAND.ST :(1976)

Commodities

Commodity Importance
Silver Primary
Lead Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Galena Ore
Sphalerite Ore
Kaolin Gangue

Alteration

  • (Local) Argillization

Host and associated rocks

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

Nearby scientific data

(1) -105.33779, 38.10557
ListMap

Economic information

Geologic structures

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

Controls for ore emplacement

  • Mineralized Fissures Along Extension Of Rosita Fault, Trachyte Body

Economic information about the deposit and operations

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

Mining district

District name Rosita

Land status

Ownership category Private

Workings at the site

  • Type of workings Underground
    Length 22.86M

Comments on the workings information

  • TUNNEL, SHAFT NEAR MOUTH OF TUNNEL, DRIFT OFF OF SHAFT

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.

General comments

Subject category Comment text
Deposit TUNNEL DRIVEN AT RIGHT ANGLE TO DIKE OF SPHERULITIC RHYOLITE

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.