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

Twentieth Century Knight Island

Occurrence in Alaska, United States with commodity Copper
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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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10000396
MRDS ID A010558
Record type Site
Current site name Twentieth Century Knight Island
Related records 10136802

Geographic coordinates

Geographic coordinates: -147.73336, 60.31484 (WGS84)

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Seward B-2(quadrangle 1:63,360 scale)

Seward SE(quadrangle 1:100,000 scale)

Seward(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Resurrection River-Frontal Resurrection Bay(hydrologic unit)

Prince William Sound(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Chugach 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

Comments on the location information

  • DEPOSIT NUMBER IS THE MAP LOCATION NUMBER FROM MF-880A. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrrhotite Gangue

Alteration

  • (Local) Basalt Is Altered To Greenstone

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Paleocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt
    Rock unit name Orca Group
    Rock description Orca Group

Nearby scientific data

(1) -147.73336, 60.31484
ListMap

Economic information

Ore body information

  • Thickness 1.83M

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Prince William Sound District

Land status

Ownership category National Forest

Comments on the workings information

  • SEVERAL HUNDRED FEET OF WORKINGS

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit SHEAR ZONE CONTAINS LENSES AND STRINGERS OF CHALCOPYRITE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1984 Hirschmann, M. M. (Elliott, R. L.) 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.