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

Unnamed (between South Fork Koyukuk River and Mosquito Fork)

Occurrence in Alaska, United States with commodities Copper, Nickel
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Alteration
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Links to other databases
  11. Bibliographic references
  12. Reporter information

Geologic information

Identification information

Deposit ID 10001381
MRDS ID A012123
Record type Site
Current site name Unnamed (between South Fork Koyukuk River and Mosquito Fork)

Geographic coordinates

Geographic coordinates: -149.64328, 67.12969 (WGS84)
Relative position This site is at an elevation of about 3,000 ft approximately 2 1/2 miles west-northwest of the confluence of Siwash Creek and Mosquito Fork (sec. 25, T. 27 N., R. 10 W., of the Fairbanks Meridian). This site corresponds to unnamed loc. 79 in DeYoung (1978). The location is accurate within a 1/2-mile radius.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chandalar A-6(quadrangle 1:63,360 scale)

Chandalar S(quadrangle 1:100,000 scale)

Chandalar(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Nickel Critical Secondary

Comments on the commodity information

  • Ore Material = Unspecified copper sulfides and/or malachite-azurite

Alteration

  • (Local) Possible oxidation of copper minerals.

Nearby scientific data

(1) -149.64328, 67.12969
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This occurrence is described only as Cu sulfides and/or malachite-azurite stains (DeYoung, 1978) at the contact between a Devonian(?) black phyllite-slate unit and a Devonian(?) unit described as diorite intrusives and andesite flows (Brosgi and Reiser, 1964). The presence of a hornfels adjacent to the igneous unit suggests that the igneous unit is a diorite intrusive. No other information is available.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Koyukuk

Reference information

Bibliographic references

  • Deposit

    Brosgi, W.P., and Reiser, H.N., 1964, Geologic map and section of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map 1-375, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-457, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Chandalar and Wiseman quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-340, 205 p.

  • Deposit

    Grybeck, D.J., 1977, Known mineral deposits of the Brooks Range, Alaska: US Geological Survey Open-File Report 77-166C, 41 p., 1 sheet, scale 1:1,000,000.

  • Deposit

    DeYoung, J.H., Jr., 1978, Mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-878-B, 2 sheets, scale 1:250,000.

  • Deposit

    Cobb, E.H., and Cruz, E.L., 1983, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in the Chandalar quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-278, 91 p.

Comments on the references

  • Primary Reference = Brosgi and Reiser, 1964

Reporter information

Type Date Name Affiliation Comment
Reporter 17-NOV-1999 J.M. Britton 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.