1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Unnamed (near Porterfield Creek)

Occurrence in Alaska, United States with commodity Tin
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Mineral occurrence model information
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

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).

Site location context

Political divisions (FIPS codes)

Wade Hampton(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Petersburg C-1(quadrangle 1:63,360 scale)

Petersburg N(quadrangle 1:100,000 scale)

Petersburg(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Southern Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Tongass National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Tin Critical Primary

Materials information

Materials Type of material
Cassiterite Ore

Mineral occurrence model information

Model code 123
USGS model code 39e
Deposit model name Alluvial placer Sn

Nearby scientific data

(1) -132.08784, 56.51875
ListMap

Economic information

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 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

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

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.