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East Gladiator

Occurrence in Alaska, United States with commodities Silver, Copper, Molybdenum, Lead, Zinc, 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. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10002120
MRDS ID A013012
Record type Site
Current site name East Gladiator

Geographic coordinates

Geographic coordinates: -153.83265, 60.17943 (WGS84)
Relative position Locality is at the top of a 1,829 m (6,000 ft) peak 4.8 km NE of the eastern end of Kontrashibuna Lake. The anomaly extends at least 1.6 km around the location. This is locality 34 of Nelson and others (1985) and locality 31 of MacKevett and Holloway (1977). Sec. 17, T. 1 N., R. 26 W., of the Seward Meridian. Accurate within 1,500 meters.

Site location context

Political divisions (FIPS codes)

Lake and Peninsula(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Lake Clark A-3(quadrangle 1:63,360 scale)

Lake Clark SE(quadrangle 1:100,000 scale)

Lake Clark(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lake Clark(hydrologic unit)

Kvichak-Port Heiden(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Lake Clark National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Copper Primary
Molybdenum Primary
Lead Primary
Zinc Critical Primary
Tin Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Molybdenite Ore
Pyrite Ore
Pyrrhotite Ore
Quartz Gangue
Sericite Gangue

Alteration

  • (Local) Sericitic, argillic, and chloritic alteration.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone

Nearby scientific data

(1) -153.83265, 60.17943
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Widespread, mostly low-grade mineralization associated with metamorphic rocks (roof pendant) and volcanic rocks in vicinity of Tertiary granite. Chalcopyrite occurs as thin fracture coatings or within quartz veins in shear zones (Nelson and others, 1985). Sulfide mineralization best developed in the meta-siltstone and argillite near andesite or diorite contact. Maximum values from rock chip samples yielded: 27.7 ppm Ag, 0.32 percent Cu, 0.09 percent Pb, 75 ppm Sn, and 0.1 percent Zn (Nelson and others, 1985).? Three close-spaced southwest flowing streams, about 3.2 km SW of this location is sample 'Area D' of Eakins (1970). These streams flow through basalt into the eastern end of Kontrashibuna Lake. Stream sediment samples reported by Eakins (1970) yielded up to 95 ppm Pb and 225 ppm Zn. Copper values were below 50 ppm. ? Nelson and others (1983, units Ti8 and Tv) describe the rocks in this area as Tertiary medium-grained biotite-hornblende granodiorite which also includes granite and quartz monzodiorite; and Tertiary volcanic rocks that include rhyolitic breccia, ash-flow tuff, flows, and felsic intrusive rocks, and subordinate mafic to intermediate flows.?
  • Age = Tertiary or younger

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Bristol Bay

Comments on the production information

  • Production Notes = No production

Comments on the reserve resource information

  • Reserves = No reserves

Comments on the workings information

  • Workings / Exploration = Maximum values from rock chip samples yielded: 27.7 ppm Ag, 0.32 percent Cu, 0.09 percent Pb, 75 ppm Sn, and 0.1 percent Zn (Nelson and others, 1985). Stream sediment samples reported by Eakins (1970) yielded up to 95 ppm Pb and 225 ppm Zn. Copper values were below 50 ppm.

Reference information

Bibliographic references

  • Deposit

    Resource Associates of Alaska, Inc., 1976, Geology and geochemistry of certain land within the Lake Clark National Park: Contract report for U.S. Bureau of Mines, 109 p.

  • Deposit

    Nelson, W.H., Carlson, C., and Case, J.E., 1983, Geologic map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1114-A, scale 1:250,000.

  • Deposit

    MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.

Comments on the references

  • Primary Reference = Nelson and others, 1985

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c)
Deposit Other Comments = Site is in Lake Clark National Park and Preserve.

Reporter information

Type Date Name Affiliation Comment
Reporter 15-JUN-1998 M.L. Miller U.S. Geological Survey
Reporter 15-JUN-1998 D.P. Bickerstaff 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.