1. Mineral Resources
  2. Online Spatial Data
  3. Alaska Resource Data File (ARDF)

Unnamed (near Spruce Creek)

Occurrence, Inactive

Map
KML
XML
GeoJSON

Commodities and mineralogy

Main commodities Au
Other commodities Ag; Pb; Sb
Ore minerals arsenopyrite; gold; jamesonite; scorodite

Geographic location

Quadrangle map, 1:250,000-scale FB
Quadrangle map, 1:63,360-scale A-4
Latitude 64.083
Longitude -148.925
Nearby scientific data Find additional scientific data near this location
Location and accuracy This unnamed prospect is located in sec. 4, T. 10 S., R. 7 W., Fairbanks Meridian. Although this occurrence is called Spruce Creek, Cobb plotted it at the head of Rex Creek, just west of Spruce Creek. The coordinates reflect Cobb's location; it is unclear if this location is accurate, and this occurrence may be a mile or more away. The occurrence is locality 38 of Cobb (1972 [MF 410]).

Geologic setting

Geologic description

Bedrock in the area is gray quartz-orthoclase-sericite schist and augen gneiss of the California Creek Member of the Totalanika Schist (Wahrhaftig, 1970 [GQ-810]). Berg and Cobb (1967, p. 202-203) reported a few gold-bearing lodes and small jamesonite-bearing veins. Samples from an antimony-bearing vein contained 0.44 ounce of gold per ton and 5.4 ounces of silver per ton (Joesting, 1943 [ATDM Pamph. 2, p. 14]).
Geologic map unit (-148.927341325027, 64.0825400433488)
Mineral deposit model Gold- and antimony-bearing veins in quartz-orthoclase-sericite schist.

Production and reserves

Workings or exploration The only work that has been reported is hand samples taken of a vein for assay (Joesting , 1943 [ATDM 2, p. 14]).
Indication of production None

References

MRDS Number A015311

References

Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Fairbanks quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-410, 1 sheet, scale 1:250,000.
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Fairbanks quadrangle, Alaska: U.S. Geological Survey Open-File Report 76-662, 174 p.
Joesting, H.R., 1943, Strategic mineral occurrences in interior Alaska, supplement to pamphlet No. 1: Alaska Territorial Department of Mines Pamphlet 2, 31 p.
Wahrhaftig, Clyde, 1970, Geologic map of the Fairbanks A-4 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-810, 1 sheet, scale 1:63:360.
Reporters J.R. Guidetti Schaefer and C.J. Freeman (Avalon Development Corporation)
Last report date 7/31/2001