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

Unnamed (tributary to Trail Creek)

Occurrence in Alaska, United States with commodities Gold, Silver, Arsenic, Boron-Borates, Bismuth, Antimony, Zinc
Map
XML
JSON
KML
C
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 10021686
MRDS ID DE00938
Record type Site
Current site name Unnamed (tributary to Trail Creek)

Geographic coordinates

Geographic coordinates: -159.89274, 59.93931 (WGS84)
Relative position This occurrence is in an unnamed west tributary to Trail Creek, about 7 miles northeast of Kagati Lake and 2 miles north of the Kagati Lake prospect (GO011). The map site is at an elevation of about 1,800 feet in the SW1/4 of section 2, T 3 S, R 62 W, of the Seward Meridian. It is area 3 of Kilburn and others (1992), and is approximately located, perhaps within 1 mile.

Site location context

Political divisions (FIPS codes)

Dillingham(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Goodnews Bay D-3(quadrangle 1:63,360 scale)

Goodnews Bay NE(quadrangle 1:100,000 scale)

Goodnews Bay(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Togiak(hydrologic unit)

Nushagak River(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Togiak National Wildlife Refuge(National Wildlife Refuge)

National Wildlife Refuge FWS(Type of land area)

FWS(Federal land areas administered by FWS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Arsenic Critical Secondary
Boron-Borates Secondary
Bismuth Critical Secondary
Antimony Critical Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Arsenopyrite Ore
Pyrite Ore
Clay Gangue
Quartz Gangue
Tourmaline Gangue

Alteration

  • (Local) Silicification, clay alteration, and oxidation.

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 Host
    Rock type Volcanic Rock (Aphanitic)
    Rock unit name Togiak Terrane
    Rock description Togiak Terrane
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -159.89274, 59.93931
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = This occurrence is in hornfels near the contact of an Upper Cretaceous granitic stock (Hoare and Coonrad, 1978). Reconnaissance stream-sediment and pan concentrate samples from the area contain anomalous levels of several elements (Kilburn and Jones, 1992; Jones and Kilburn, 1992). Silicified hornfels contains disseminated pyrite and pyrite-, arsenopyrite-, and tourmaline-bearing quartz veins. Clay alteration and weakly disseminated pyrite characterize some iron-stained outcrops. Rock samples of altered and mineralized hornfels contain up to 0.28 ppm Ag, greater than 3,800 ppm As, 0.15 ppm Au, greater than 2,000 ppm B, 11 ppm Bi, greater than 5,000 ppm Mn, 5.4 ppm Sb, and 230 ppm Zn (Kilburn and others, 1992).
  • Age = Late Cretaceous. The mineralization is assumed to be related to the Upper Cretaceous granitic stock, which yielded a K/Ar age of 71.1 +/- 2.1 Ma on biotite (Hoare and Coonrad, 1978).

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Bristol Bay Region

Comments on the workings information

  • Workings / Exploration = Only reconnaissance surface observations and sampling have been completed in the area.

Reference information

Bibliographic references

  • Deposit

    Hoare, J.M., and Coonrad, W.L., 1978, Geologic map of the Goodnews and Hagemeister Island quadrangles region, southwestern Alaska: U.S. Geological Survey Open-File Report 78-9-B, two sheets, scale 1:250,000.

  • Deposit

    Kilburn, J.E., and Jones, J.L., 1992, Geochemical map showing the distribution of selected elements determined in stream-sediment samples from the Goodnews Bay, Hagemeister Island, and Nushagak Bay quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2355, scale 1:250,000.

  • Deposit

    Jones, J.L., and Kilburn, J.E., 1992, Geochemical map showing the distribution of selected elements determined in heavy-mineral-concentrate samples from the Goodnews Bay, Hagemeister Island, and Nushagak Bay quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2186, scale 1:250,000.

  • Deposit

    Kilburn, J., Box, S.E., Goldfarb, R.J., and Gray, J.E., 1992, Geochemically anomalous areas in the eastern Goodnews Bay quadrangle, southwest Alaska, in Bradley, D. C., and Ford, A. B., eds., The U.S. Geological Survey in Alaska, Accomplishments in 1990: U. S. Geological Survey Bulletin 1999, p. 156-162.

Comments on the references

  • Primary Reference = Kilburn and others, 1992

General comments

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

Reporter information

Type Date Name Affiliation Comment
Reporter 20-MAR-2001 Travis L. Hudson Applied Geology

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.