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Unnamed (in Tatlawiksuk River basin)

Occurrence in Alaska, United States with commodities Silver, 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. 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 10307831
Record type Site
Current site name Unnamed (in Tatlawiksuk River basin)

Geographic coordinates

Geographic coordinates: -155.59487, 62.23244 (WGS84)
Relative position This unnamed occurrence is located in a small saddle along a southwest-northeast-trending spur overlooking a south-flowing tributary of the Tatlawiksuk River; it is at an elevation of 2,150 feet (655 m) in the NW1/4 sec. 28, T. 25 N., R. 34 W., of the Seward Meridian. The reporter visited the site in 1978; at station no. 78BT196.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

McGrath A-6(quadrangle 1:63,360 scale)

McGrath SW(quadrangle 1:100,000 scale)

McGrath(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Stony River(hydrologic unit)

Upper Kuskokwim River(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Copper Secondary

Materials information

Materials Type of material
Pyrite Ore
Quartz Gangue

Mineral occurrence model information

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

Nearby scientific data

(1) -155.59487, 62.23244
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This unnamed occurrence is a pyrite-rich quartz-breccia zone within a N5E-trending, high-angle fault zone that juxtaposes quartz monzonite and thermally altered Kuskokwim Group rocks (Wilson and others, 1998). A pronounced fault zone is at least 15 meters thick and extends for 10 kilometers along strike. One grab sample of pyrite-rich gossan from the fault zone contained 10.1 grams/tonne silver and 142 ppm copper (T.K. Bundtzen, written communication, 1998).

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name McGrath

Comments on the workings information

  • Workings / Exploration = The unnamed occurrence was found by the reporter during geologic mapping conducted for the Alaska Division of Geological and Geophysical Surveys; and eventually published in Wilson and others (1998). One grab sample contained 10.1 grams/tonne silver and 142 ppm copper (T.K. Bundtzen, written communication, 1998).

Reference information

Comments on the references

  • Primary Reference = This description

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c).

Reporter information

Type Date Name Affiliation Comment
Reporter 18-DEC-98 T.K. Bundtzen Pacific Rim Geological Consulting

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.