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Hahns Peak District

Prospect in Routt county in Colorado, United States with commodities Gold, Silver, Lead, Zinc, Copper, Molybdenum
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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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Economic information about the deposit and operations
  12. Mining district
  13. Bibliographic references
  14. Reporter information

Geologic information

Identification information

Deposit ID 10311069
Record type District
Current site name Hahns Peak District
Alternate or previous names Columbine

Geographic coordinates

Geographic coordinates: -106.92925, 40.84275 (WGS84)

Site location context

Political divisions (FIPS codes)

Routt(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Hahns Peak(quadrangle 1:24,000 scale)

Walden(quadrangle 1:100,000 scale)

Craig(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Yampa(hydrologic unit)

White-Yampa(hydrologic accounting unit)

White-Yampa(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

Medicine Bow-Routt 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 Routt

Comments on the location information

  • District is centered on Hahns Peak about 25 miles north of Steamboat Springs, in sec 9, T 10 N, R 85 W. It includes an indefinite area about 10 miles east-west and 5 miles north-south.

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Lead Secondary
Zinc Critical Secondary
Copper Tertiary
Molybdenum Tertiary

Comments on the commodity information

  • Potential exploration targets are disseminated silver-lead-zinc deposits, copper-molybdenum deposits, and gold deposits.

Materials information

Materials Type of material
Galena Ore
Pyrite Ore
Sphalerite Ore
Tetrahedrite Ore
Variscite Gangue
Wavellite Gangue
Chalcopyrite Trace
Covellite Trace
Proustite Trace

Alteration

  • (Local) silicification, sericitization, kaolinitization, pyritization

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Porphyry
    Rock unit name dacite, quartz latite, and rhyolite intrusive porphyry of Hahns Peak
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock
    Rock unit name Morrison and Sundance Formations
    Stratigraphic age (youngest) Early Cretaceous
  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Dakota Sandstone
    Stratigraphic age (youngest) Cretaceous
  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock unit name Mancos Shale
    Stratigraphic age (youngest) Miocene
  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock
    Rock unit name Browns Park Formation
    Stratigraphic age (youngest) Pliocene
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock
    Rock unit name mafic dikes

Nearby scientific data

(1) -106.92925, 40.84275
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description breccia pipe in porphyry stock

Comments on the geologic information

  • A porphyry stock, and related dikes and sills, intrudes and domes Precambrian to Miocene rocks. The stock has been intensely altered, brecciated, and mineralized.
  • A zone of breccia just SE of Hahns Peak contains highly anomalous values of silver, lead, and zinc, plus anomalous copper and molybdenum. (USGS Bulletin 1367)

Economic information about the deposit and operations

Development status Prospect
Significant Yes

Mining district

District name Hahns Peak District

Comments on the production information

  • Modest placer gold production valued at $200,000 (10,000 oz) to $500,000 (25,000 oz), plus small amounts of silver-copper-lead-zinc ore.

Comments on the reserve resource information

  • USGS studies indicate a large tonnage of very low grade material: a mineralized zone contains 1.3 million tons at a grade of 0.58 oz/ton silver, 0.5% lead and 0.2% zinc, and a larger zone contains 710 million tons at a grade of 0.29 oz/ton silver, 0.1% lead, and 0.06% zinc. (USGS Bulletin 1367) Although the tonnage of contained metals is high, it is doubtful that this material would be a resource because the grade is so low.

Comments on development

  • The area near Hahns Peak has been prospected extensively since placer gold was discovered in 1864. From the 1960s to the 1990s, intensive exploration, including geochemical and geophysical surveys, drilling and drifting, has been conducted.

Reference information

Bibliographic references

  • Deposit

    George, R. D., and Crawford, R. D., 1909, The Hahns Peak region, Routt County, Colorado: Colorado Geological Survey First Report, 1908, p. 189-229.

  • Reserve-Resource

    Young, E. J., and Segerstrom, K., 1973, A disseminated silver-lead-zinc sulfide occurrence at Hahns Peak, Routt County, Colorado: U.S. Geological Survey Bulletin 1367, 33 p.

  • Deposit

    Neubert, J. T., 1994, Mineral appraisal of Routt National Forest, Colorado: U.S. Bureau of Mines Open File Report MLA 13-94, 64 p., appendicies.

Reporter information

Type Date Name Affiliation Comment
Reporter 28-APR-2006 Beach, Richard A. 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.