Unnamed (north of Simeon Bight)

Prospect, Active?

Commodities and mineralogy

Main commodities Au
Other commodities As; Cu; Hg; Pb; Zn
Ore minerals gold; pyrite

Geographic location

Quadrangle map, 1:250,000-scale PM
Quadrangle map, 1:63,360-scale B-3
Latitude 55.294
Longitude -160.409
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of 300 feet on western Popof Island approximately 0.3 mile north of the west part of Simeon Bight. The map site is in the northeast corner of sec. 35, T. 56 S., R. 73 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description

The rocks at this site are basaltic tuffs and flows interbedded with ash and crystal-lithic tuffs of the Eocene to Oligocene Popof volcanic rocks (Wilson and others, 1995). Two distinct areas of alteration are present. The westernmost is a north-trending 5,000- by 1,000-foot zone of silicification. Approximately 1,000 feet to the east is a 2,000- by 2,000-foot zone of mixed silicified and argillized rock (Ellis and Apel, 1989). Pyrite is the only sulfide reported.
Grid sampling of soil and rocks revealed only scattered, low-order gold anomalies; however, widespread arsenic and mercury anomalies were outlined. The prospect was explored by 5 drill holes. Three were drilled on a gold-arsenic anomaly just southwest of a 4,000-gamma magnetic low. This drilling penetrated rock carrying scattered gold values of 20 to 200 ppb and localized base metal values of 100 to 2,500 ppm copper, 100 to 800 ppm lead, and 200 to 700 ppm zinc (Ellis and Apel, 1989). All five drill holes cut strong to pervasive silicification, argillization, pyritization, and localized solfataric alteration marked by native sulfur.
Geologic map unit (-160.411018894059, 55.2931764340078)
Age of mineralization Eocene or younger.
Alteration of deposit The volcanic rocks exhibit silicic, argillic and solfataric alteration.

Production and reserves

Workings or exploration In 1989 Battle Mountain Exploration Company mapped this prospect, collected 250 rock and 500 soil samples, conducted VLF-EM surveys, power-augered 97 holes, and drilled five core holes for a total of 2,795 feet (Ellis and Apel, 1989; 1990). Fifty-five rock samples were taken in 1990. Only scattered low-level gold values were found.
Indication of production None

Additional comments

This site is located on land patented by, or interim-conveyed to, the Aleut Corporation.

References

MRDS Number 10308165

References

Ellis, W.T., and Apel, R.A., 1989, Unga/Alaska Peninsula 1989 final report: Battle Mountain Exploration Company report, 41 p., 28 map sheets at various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)
Ellis, W.T., and Apel, R.A., 1990, Unga/Alaska Peninsula 1990 final report: Battle Mountain Exploration Company report, 49 p., 29 map sheets at various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)
Reporters S.H. Pilcher
Last report date 1/31/2001