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Unnamed (headwaters of Virginia Creek)

Prospect in Alaska, United States with commodities Silver, Copper, Lead, Zinc
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Geologic information

Identification information

Deposit ID 10307538
Record type Site
Current site name Unnamed (headwaters of Virginia Creek)

Geographic coordinates

Geographic coordinates: -147.79084, 63.82764 (WGS84)
Relative position This prospect is at an elevation of about 4,000 feet in the headwaters of Virginia Creek, a tributary of the Wood River. The site is in sec. 32, T.12 S., R. 1 W., of the Fairbanks Meridian. The location is accurate to within one-quarter mile.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Copper Primary
Lead Primary
Zinc Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrrhotite Ore
Sphalerite Ore
Quartz Gangue
Sericite Gangue

Mineral occurrence model information

Model code 184
USGS model code 28a
Deposit model name Massive sulfide, kuroko
Mark3 model number 93

Host and associated rocks

  • Host or associated Host
    Stratigraphic age (youngest) Cambrian
    Stratigraphic age (oldest) Paleoproterozoic

Nearby scientific data

(1) -147.79084, 63.82764
ListMap

Comments on the geologic information

  • Geologic Description = This deposit is a steeply-dipping stratabound massive sulfide horizon up to 13.1 feet thick in pelite and quartzite of the lower Paleozoic to possibly Upper Precambrian Birch Creek Schist (Wilson and others, 1998). The metasediments are cut by a lower Tertiary to Cretaceous intrusive stock on the southeastern boundary of the prospect area. The sulfide minerals are chalcopyrite, galena, pyrrhotite, and sphalerite. At least six drill holes have tested the deposit. Samples contain up to 0.53% copper, 1.89% lead, 6.51% zinc, 185.1 grams of silver per ton and 0.38 grams of gold per ton (www.grayd.com, 1999).
  • Age = Mineralization was probably syngenetic with host rocks that are early Paleozoic to possibly Late Precambrian.

Economic information

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Active

Mining district

District name Bonnifield

Comments on the workings information

  • Workings / Exploration = Geophysical and geochemical surveys have outlined the sulfide zone. At least six holes have been drilled at the prospect. Samples contain up to 0.53% copper, 1.89% lead, 6.51% zinc, 185.1 grams of silver per ton and 0.38 grams of gold per ton (www.grayd.com, 1999).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF HE097

Bibliographic references

  • Deposit

    Bundtzen, T.K., Eakins, G.R., Clough, J.G., Lueck, L.L., Green, C.B., Robinson, M.S., and Coleman, D.A., 1984, Alaska's Mineral Industry, 1983: Alaska Division of Geological and Geophysical Surveys Special Report 33, 56 p.

  • Deposit

    Eakins, G.R., Bundtzen, T.K., Lueck, L.L. Green, C.B., Gallagher, J.L., and Robinson, M.S., 1985, Alaska mineral industry, 1984: Alaska Division of Geological and Geophysical Surveys Special Report 38, 57p.

  • Deposit

    Wilson, F.H., Dover, J.H., Bradley, D.C., Weber, F.R., Bundtzen, T.K., and Haeussler, P.J., 1998, Geologic map of central (interior) Alaska: U.S. Geological Survey Open-File Report 98-133, 17 p., 2 sheetsm, scale 1:500,000.

Comments on the references

  • Primary Reference = www.grayd.com, 1999

General comments

Subject category Comment text
Deposit Model Name = Kuroko massive sulfide (Cox and Singer, 1986; model 28a)

Reporter information

Type Date Name Affiliation Comment
Reporter 07-APR-00 N. Van Wyck Stevens Exploration Management Corporation