Unnamed (overlooking tributary of Cheeneetnuk River)

Occurrence in Alaska, United States with commodities Lead, Zinc, Silver, Copper

Geologic information

Identification information

Deposit ID 10307839
Record type Site
Current site name Unnamed (overlooking tributary of Cheeneetnuk River)

Geographic coordinates

Geographic coordinates: -154.93085, 62.17245 (WGS84)
Relative position This unnamed occurrence is located on a south-facing spur overlooking an unnamed tributary of Cheeneetnuk River. It is about 2.5 kilometers southwest of VABM Big (White Mountain), at an elevation of 1,900 feet (579 m) in the NE1/4 sec. 15, T. 24 N., R. 31 W., of the Seward Meridian. The location corresponds to map number 25-26 of Gilbert (1981); his station no. 79WG192.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Lead Primary
Zinc Primary
Silver Secondary
Copper Secondary

Mineral occurrence model information

Model code 72
USGS model code 19a
Deposit model name Polymetallic replacement
Mark3 model number 47

Nearby scientific data

(1) -154.93085, 62.17245

Comments on the geologic information

  • Geologic Description = This unnamed occurrence is a ferricrete gossan hosted in an unnamed Ordovician mudstone unit of the Nixon Fork subterrane (Gilbert, 1981; Wilson and others, 1998). The gossan is parallel to bedding in the unit; no surface measurements are available. Two grab samples taken in the gossan zone contained up to 3.0 grams/tonne silver, 81 ppm copper, 320 ppm lead, and 6,800 ppm zinc (Gilbert, 1981).
  • Ore Material = Iron oxides

Economic information

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name McGrath

Comments on the workings information

  • Workings / Exploration = W.G. Gilbert found the occurrence during geological mapping for the Alaska Division of Geological and Geophysical Surveys in 1979 (Gilbert, 1981). Two grab samples taken across the gossan zone contained up to 3.0 grams/tonne silver, 81 ppm copper, 320 ppm lead, and 6,800 ppm zinc (Gilbert, 1981).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF MG023

Bibliographic references

  • Deposit

    Gilbert, W.G., 1981, Preliminary geologic map of the Cheeneetnuk River area, Alaska: Alaska Division of Geological and Geophysical Surveys Open-File Report 153, 19 pages, 2 sheets, 1:63,360 scale.

  • Deposit

    Wilson, F.H., Dover, J.H., Bradley, D.C., Weber, F.R., Bundtzen, T.K., and Haeussler, P.J., 1998, Geologic map of central (interior) Alaska: U.S. Geological Survey Open-File Report 98-133, 17 p., 2 sheetsm, scale 1:500,000.

Comments on the references

  • Primary Reference = Gilbert, 1981

General comments

Subject category Comment text
Deposit Model Name = Polymetallic replacement (?) (Cox and Singer, 1986; model 19a)

Reporter information

Type Date Name Affiliation Comment
Reporter 11-DEC-98 T.K. Bundtzen Pacific Rim Geological Consulting