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  3. Mineral Resource Data System (MRDS)

Unnamed (north of Noatak River)

Occurrence in Alaska, United States with commodities Copper, Lead, Tin, Silver, Arsenic, Gold, Beryllium, Bismuth, Antimony, Zinc
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10001213
MRDS ID A011926
Record type Site
Current site name Unnamed (north of Noatak River)

Geographic coordinates

Geographic coordinates: -155.01348, 67.54959 (WGS84)
Relative position This site is a composite of three occurrences (localities 23-25 of Grybeck and Nelson, 1981) in an area of about 10 square miles north of the Noatak River and south of Mt. Papiok. The coordinates are for the center of an area, in sec. 22, T. 25 N., R. 17 E., of the Kateel River Meridian. Location of area accurate to within 2000 ft.

Site location context

Political divisions (FIPS codes)

Northwest Arctic(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Survey Pass C-5(quadrangle 1:63,360 scale)

Survey Pass N(quadrangle 1:100,000 scale)

Survey Pass(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Noatak River(hydrologic unit)

Noatak River-Lisburne Peninsula(hydrologic accounting unit)

Northwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Gates of the Arctic National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Lead Primary
Tin Critical Primary
Silver Secondary
Arsenic Critical Secondary
Gold Secondary
Beryllium Critical Secondary
Bismuth Critical Secondary
Antimony Critical Secondary
Zinc Critical Secondary

Comments on the commodity information

  • Gangue = Calc-silicate minerals

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrrhotite Ore
Sphalerite Ore
Quartz Gangue

Alteration

  • (Local) Quartz and calc-silicate minerals.

Mineral occurrence model information

Model code 43
USGS model code 14b
Deposit model name Sn skarn

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Mt. Igikpak Pluton; Gneissic Granite
    Rock description Mt. Igikpak Pluton; Gneissic Granite
    Stratigraphic age (youngest) Late Devonian
    Stratigraphic age (youngest) Late Devonian
    Stratigraphic age (youngest) Late Devonian
  • Host or associated Host
    Rock type Metamorphic Rock > Phyllite

Nearby scientific data

(1) -155.01348, 67.54959
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The occurrences at the site are contact-metamorphic deposits in Paleozoic phyllite and limestone over a dome of Devonian gneissic granite that is exposed on the north bank of the Noatak River. Three small mineral occurrences have been documented (Grybeck and Nelson, 1981). They include quartz vein rubble and skarn containing various combinations of ore minerals including galena, chalcopyrite, pyrrhotite, and sphalerite. Select samples contain up to 480 ppm Ag, 3.5 ppm Au, 5,000 ppm As, 150 ppm Be, 150 ppm Bi, and 100 ppm Sn. The occurrences are similar to those at SP009, and to other contact metamorphic deposits elsewhere in the Brooks Range (Newberry and others, 1986).
  • Age = Related to the intrusion of the Devonian pluton.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Noatak

Comments on the workings information

  • Workings / Exploration = Samples were mostly collected during spot stops and short traverses during geologic mapping by the USGS in the late 1970s.

Reference information

Comments on the references

  • Primary Reference = Grybeck and Nelson, 1981

General comments

Subject category Comment text
Deposit Model Name = Skarn (Cox and Singer, 1986; model 14b)
Deposit Other Comments = Located within Gates of the Arctic National Park.

Reporter information

Type Date Name Affiliation Comment
Reporter 20-SEP-1999 S.W. Nelson 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.