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

Unnamed (upper Horsfeld Creek)

Prospect in Alaska, United States with commodity Copper
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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. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10000778
MRDS ID A011421
Record type Site
Current site name Unnamed (upper Horsfeld Creek)
Alternate or previous names Unnamed

Geographic coordinates

Geographic coordinates: -141.25859, 62.05582 (WGS84)
Relative position Best location: Richter and others, 1973, USGS I-807, loc. 6. Accurate within 100 ft radius

Site location context

Political divisions (FIPS codes)

Southeast Fairbanks(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Nabesna A-1(quadrangle 1:63,360 scale)

Nabesna SE(quadrangle 1:100,000 scale)

Nabesna(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Federal lands

Wrangell-St. Elias National Preserve(National Preserve)

National Preserve NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)
    Rock unit name Chisana Formation
    Rock description Chisana Formation
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)

Nearby scientific data

(1) -141.25859, 62.05582
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = 2-ft-wide quartz vein containing chalcopyrite in volcanic breccia of the Chisana Formation of Cretaceous age.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chisana

Comments on the workings information

  • Workings / Exploration = Grab sample of quartz vein assayed: 30 ppm Ag, 0.04 ppm Au, 10,000 ppm Cu, 7000 ppm Pb, 700 ppm Zn (USGS OF 471, sample 153). Type of workings: surface

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Richter and others, 1973, USGS I-807

General comments

Subject category Comment text
Deposit Model Name = Lode: vein

Reporter information

Type Date Name Affiliation Comment
Reporter 07-FEB-1997 Leonard, K.R. U.S. Geological Survey
Reporter 07-FEB-1997 Elliott, R.L. U.S. Geological Survey
Reporter 07-FEB-1997 Richter, D.H. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.