Pinnell River

Occurrence in Alaska, United States with commodities Gold, Silver, Chromium, Lead, Zinc

Geologic information

Identification information

Deposit ID 10001890
MRDS ID A012716
Record type Site
Current site name Pinnell River
Related records 10112304

Geographic coordinates

Geographic coordinates: -163.0734, 65.85937 (WGS84)
Relative position Pinnell River is a major north-flowing tributary to Inmachuk River. This occurrence is on the east side of the Pinnell River valley, just above the Fairhaven ditch at an elevation of 750 feet. It is 1.8 miles south of Inmachuk River.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Chromium Secondary
Lead Secondary
Zinc Secondary

Comments on the commodity information

  • Gangue = Fuchsite

Materials information

Materials Type of material
Quartz Gangue

Alteration

  • (Local) The occurrence is oxidized and quartz veining of marble is present.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Marble

Nearby scientific data

(1) -163.0734, 65.85937

Comments on the geologic information

  • Geologic Description = A small orange gossan is developed in black dolomitic marble just above the Fairhaven ditch at an elevation of 750 feet. The marble is partially replaced by disseminations and stockwork veinlets of quartz and veinlets of fuchsite (Herried, 1966). A gossan sample contained 0.02 ounces/ton Au, 0.023 ounces/ton Ag, 0.05 % Cu, 0.05 % Pb, 0.05 % Zn, and 0.5 % Cr (Herried, 1966, Table 1). Most of the bedrock in the area is a metasedimentary schist and marble sequence of Lower Paleozoic age (Till and others, 1986).
  • Age = Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age. Some lode gold deposits on southern Seward Peninsula are mid-Cretaceous in age (see Midnight Mountain, BN047).

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Fairhaven

Comments on the workings information

  • Workings / Exploration = Small, hand dug prospecting pits may be present.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012716
USGS Alaska Resource Data File ARDF BN064

Bibliographic references

  • Deposit

    Herried, G.H., 1965, Geology of the Omilak-Otter Creek area, Bendeleben quadrangle, Alaska: Alaska Division of Mines and Minerals Geological Report 11, 12 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 = Herried, 1966

General comments

Subject category Comment text
Deposit Model Name = Vein and replacement in marble ?

Reporter information

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