Unnamed (near Porterfield Creek)

Occurrence in Alaska, United States with commodity Tin

Geologic information

Identification information

Deposit ID 10308057
Record type Site
Current site name Unnamed (near Porterfield Creek)

Geographic coordinates

Geographic coordinates: -132.08784, 56.51875 (WGS84)
Relative position Sixteen placer claims known only generally to be along Porterfield in sections 1, 2 and 11, T. 62 S., R. 85 E. Coordinates are approximately the center of the claim block (U.S. Bureau of Mines, 1980).
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Geographic areas

Country State
United States Alaska


Commodity Importance
Tin Primary

Materials information

Materials Type of material
Cassiterite Ore

Mineral occurrence model information

Model code 123
USGS model code 39e
BC deposit profile C01. C02
Deposit model name Alluvial placer Sn

Nearby scientific data

(1) -132.08784, 56.51875

Comments on the geologic information

  • Geologic Description = Sixteen placer claims staked for Sn; active from 1965 to 1967 but apparently not since (U.S. Bureau of Mines, 1980). Note that a viable source for placer tin has been documented in the Ag-Sn-Pb-Zn layered skarn deposit in upper Groundhog Basin (PE040).

Economic information

Economic information about the deposit and operations

Development status Occurrence

Mining district

District name Petersburg

Comments on the production information

  • Production Notes = Probably none

Comments on the workings information

  • Workings / Exploration = Sixteen placer claims staked for Sn; active from 1965 to 1967 but apparently not since.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF PE039

Bibliographic references

  • Deposit

    U.S. Bureau of Mines, 1980, Claim map, Petersburg quadrangle, Alaska: U.S. Bureau of Mines Map 117, 1 sheet, scale 1:250,000.

  • Deposit

    Grybeck, D.J., Berg, H.C., and Karl, S.M., 1984, Map and description of the mineral deposits in the Petersburg and eastern Port Alexander quadrangles: U.S. Geological Survey Open-File Report 84-837, 86 p., 1 sheet, scale 1:250,000.

General comments

Subject category Comment text
Deposit Model Name = Placer tin (Cox and Singer, 1986; model 39e)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-98 H.C. Berg and D.J. Grybeck U.S. Geological Survey