Unnamed (headwaters of North Fork, Mosquito Creek)

Occurrence in Alaska, United States with commodities Silver, Lead, Zinc, Antimony, Tin

Geologic information

Identification information

Deposit ID 10307280
Record type Site
Current site name Unnamed (headwaters of North Fork, Mosquito Creek)

Geographic coordinates

Geographic coordinates: -162.6033, 65.08936 (WGS84)
Relative position This occurrence is on the ridge crest (approximate 1,850 feet elevation) on the north side of the headwaters of North Fork, Mosquito Creek. Mosquito Creek flows westward from headwaters in the northern Darby Mountains to Telephone Creek, a tributary to Fish River in McCarthy's Marsh. It is approximately the location of sample localities 5 and 6 of Miller and Grybeck (1973). Gamble (1988) showed these as locations 50 and 51.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Primary
Antimony Secondary
Tin Secondary

Alteration

  • (Local) These occurrences are oxidized, gossanous zones in metacarbonate rocks.

Nearby scientific data

(1) -162.6033, 65.08936

Comments on the geologic information

  • Geologic Description = Two samples of apparently small, iron-stained zones in metamorphosed carbonate rocks were collected by Miller and Grybeck (1973) near this location. A composite grab sample of iron-stained carbonate contained 70 ppm Ag, 2,000 ppm As, 0.1 ppm Au, 200 ppm Cu, greater than 20,000 ppm Pb, 700 ppm Sb, 500 ppm Sn, and 7,000 ppm Zn. A grab sample of gossan in calcareous metasedimentary rock contained 3 ppm Ag, 3,000 ppm As, 200 ppm Cu, 70 ppm Mo, 1,500 ppm Pb, and greater than 10,000 ppm Zn. These occurrences are in lower Paleozoic metasedimentary rocks (Till and others, 1986).
  • Age = Cretaceous ; Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age.

Economic information

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Council

Comments on the workings information

  • Workings / Exploration = None are known, some shallow hand dug prospecting pits may be locally present in this area.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF BN095

Bibliographic references

  • Deposit

    Miller, T.P., and Grybeck, D.J., 1973, Geochemical survey of the eastern Solomon and southeastern Bendeleben quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 553, 115 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.

  • Deposit

    Gamble, B.M., 1988, Non-placer mineral occurrences in the Solomon, Bendeleben, and southern part of the Kotzebue quadrangles, western Alaska: U.S. Geological Survey Map MF-1838-B, 13 p., 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Miller and Grybeck, 1973

General comments

Subject category Comment text
Deposit Model Name = Sulfide veins and/or replacements in carbonate rocks

Reporter information

Type Date Name Affiliation Comment
Reporter 15-MAR-99 Travis L. Hudson Applied Geology