Unnamed (west of upper Butte Creek)

Prospect, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals arsenopyrite; pyrite
Gangue minerals chlorite; quartz; sericite

Geographic location

Quadrangle map, 1:250,000-scale HE
Quadrangle map, 1:63,360-scale A-3
Latitude 63.15
Longitude -148.04
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of about 4,200 feet, near the head of an unnamed, southeast-flowing tributary to upper Battle Creek. The map site is just north of the center of sec. 25, T. 20 S., R. 3 W., of the Fairbanks Meridian. The location is accurate to within one mile.

Geologic setting

Geologic description

The country rock at this prospect is Jurassic or Cretaceous metagraywacke and argillite. The deposit consists of quartz-chlorite-sericite veins that contain arsenopyrite and pyrite. Samples of the vein assay 10 to 100 ppb gold (Anonymous, 1997).
Geologic map unit (-148.042262903457, 63.1495457141999)
Mineral deposit model Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Jurassic or younger.
Alteration of deposit Phyllic.

Production and reserves

Workings or exploration Seven drill holes were completed at the prospect in 1991 (Anonymous, 1997).
Indication of production None

Additional comments

Drill core, logs, and assays from this prospect are available at the Alaska Materials Center.

References