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

Shakan

Prospect in Alaska, United States with commodities Molybdenum, Copper, Zinc
Map
XML
JSON
KML
B
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10308984
MRDS ID A010342
Record type Site
Current site name Shakan
Alternate or previous names Alaska Treadwell Mining Co.
Related records 10000295

Geographic coordinates

Geographic coordinates: -133.45986, 56.13473 (WGS84)
Relative position The Shakan molybdenum prospect (also known as the Alaska Treadwell Mining Co), is near the east end of Shakan Strait on northern Kosciusko Island. This well known prospect is on the east side of Shakan Creek at an elevation of about 600 feet, just north of the center of section 23, T. 66 S., R. 77 E.

Site location context

Political divisions (FIPS codes)

Prince of Wales-Hyder(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Petersburg A-5(quadrangle 1:63,360 scale)

Petersburg S(quadrangle 1:100,000 scale)

Petersburg(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Prince of Wales(hydrologic unit)

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
Molybdenum Primary
Copper Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Molybdenite Ore
Pyrite Ore
Pyrrhotite Ore
Sphalerite Ore
Albite Gangue
Quartz Gangue

Nearby scientific data

(1) -133.45986, 56.13473
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The country rocks in the vicinity consist of Cretaceous biotite-quartz hornfels altered from Silurian graywacke turbidite of the Bay of Pillars Formation and a large Cretaceous diorite pluton that intrudes the bedded rocks (Brew and others, 1984). The Shakan molybdenum deposit is at or near the contact between the pluton and the hornfels and probably is genetically related to the emplacement of this pluton. The deposit is a sulfide-bearing fault-breccia zone 1-10 feet thick associated with hornblende diorite pegmatite; the zone contains abundant pyrrhotite, molybdenite, and chalcopyrite, with minor sphalerite and pyrite, in quartz-albite gangue.
  • Age = Probably Cretaceous based on age of associated pluton.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Probably inactive

Mining district

District name Ketchikan

Comments on the production information

  • Production Notes = None

Comments on the reserve resource information

  • Reserves = Smith (1942) estimated the resources of the Shakan molybdenum prospect to be 10,000-20,000 tons of rock containing about 1.5% MoS2.

Comments on the workings information

  • Workings / Exploration = The Shakan molybdenum prospect was discovered in 1917 and developed by a 570 foot tunnel and 14 surface cuts during and immediately after World War I (Chapin, 1919). Little or no subsequent exploration work on it beyond cursory examinations by passing geologists, although it was examined at some length by government geologist during World War II (Twenhofel and others, 1946; Smith, 1942, Thorne, 1943).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Smith, 1942; Twenhofel and others, 1946

General comments

Subject category Comment text
Deposit Model Name = Molybdenite associated with pegmatite dike along fault zone.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1998 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.