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

Unnamed (south of upper Gravel 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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10000777
MRDS ID A011420
Record type Site
Current site name Unnamed (south of upper Gravel Creek)
Alternate or previous names Unnamed
Related records 10282547

Geographic coordinates

Geographic coordinates: -141.25248, 62.08249 (WGS84)
Relative position Best location: Richter and others, 1973, USGS I-807, loc. 5. 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
Pyrite Gangue

Alteration

  • (Local) Altered area 100 m by 300 m, principally of limonite staining from oxidation of sulfides

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -141.25248, 62.08249
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Disseminated pyrite and minor chalcopyrite in small diorite stock that intrudes Cretaceous or Jurassic hornfelsed argillite

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 = Type of workings: surface

Reference information

Bibliographic references

  • Deposit

    Richter, D.H., and Matson, N.A., 1972, Metallic mineral resources map of the Nabesna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-422, scale 1:250,000.

  • Deposit

    Richter, D.H., Matson, N.A., Jr., and Smoll, H.R., 1973, Reconnaissance geologic map of the Nabesna A-1 quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map 1-807, scale 1:63,360.

  • Deposit

    Richter, D.H., Singer, D.A., and Cox, D.P., 1975, Mineral resources map of the Nabesna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-655-K, scale 1:250,000.

Comments on the references

  • Primary Reference = Richter and others, 1973, USGS I-807, loc. 5.

General comments

Subject category Comment text
Deposit Model Name = Lode: porphyry
Deposit Other Comments = See also: Baultoff (NB100), Horsfeld (NB099)

Reporter information

Type Date Name Affiliation Comment
Reporter 04-FEB-1997 Leonard, K.R. U.S. Geological Survey
Reporter 04-FEB-1997 Elliott, R.L. U.S. Geological Survey
Reporter 04-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.