Unnamed (in headwaters of upper Niukluk River)

Occurrence in Alaska, United States with commodities Copper, Lead

Geologic information

Identification information

Deposit ID 10001935
MRDS ID A012769
Record type Site
Current site name Unnamed (in headwaters of upper Niukluk River)

Geographic coordinates

Geographic coordinates: -163.87333, 65.17933 (WGS84)
Relative position This occurrence is on the ridge crest between two unnamed, east headwater tributaries to the Niukluk River, near elevation 2,247 feet.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Lead Primary

Materials information

Materials Type of material
Duftite Ore

Alteration

  • (Local) Oxidation?

Nearby scientific data

(1) -163.87333, 65.17933

Comments on the geologic information

  • Geologic Description = This is a possible duftite occurrence along the trend of an apparently conformable pyrrhotite-bearing schist layer that is better expressed about one half mile to the ENE (Briskey, 1983). This locality, and several others in this part of the Bendeleben A-4 quadrangle, are in high grade metamorphic rocks that are structurally above or peripheral to the crosscutting Pargon pluton. The Pargon pluton is mostly granodiorite and assumed to be Cretaceous in age (Till and others, 1986). It was emplaced at shallower depths than the more deep-seated Bendeleben pluton to the east. The metamorphic rocks peripheral to the western Pargon pluton are also intruded by small, felsic dikes and plugs including quartz porphyry and muscovite granite.
  • Age = Cretaceous

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Council; Niukluk-Pargon River

Comments on the workings information

  • Workings / Exploration = No workings are known at this locality.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012769
USGS Alaska Resource Data File ARDF BN135

Bibliographic references

  • Deposit

    Briskey, J.A., 1983, Summary of field observations on Seward Peninsula mineral deposits: U.S. Geological Survey, unpublished administrative report, 34 p.

  • Deposit

    Till, A.B., Dumoulin, J.A., Gamble, B. ., Kaufman, D.S., and Carroll, P.I., 1986, Preliminary geologic map and fossil data, Soloman, Bendeleben, and southern Kotzebue quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 86-276, 10 p., 3 plates, scale 1:250,000.

Comments on the references

  • Primary Reference = Briskey, 1983

General comments

Subject category Comment text
Deposit Model Name = Duftite (?) in metamorphic rocks

Reporter information

Type Date Name Affiliation Comment
Reporter 15-MAR-1999 Travis L. Hudson Applied Geology