Unnamed (at the head of Devil Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Hg; Sb; Zn

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale D-4
Latitude 62.96
Longitude -148.8315
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is above the head of Devil Creek, at an elevation of about 4,500 feet on the southwest flank of hill 5374 (which is locally called U Mountain). It is about 0.4 mile south of the center of sec. 35, T. 22 S., R. 7 W. of the Seward Meridian. The location is accurate to within 1/4 mile.

Geologic setting

Geologic description

This occurrence is in altered felsic volcanic rocks. It includes gossan zones and chalky zones marked by iron- and manganese-oxide(?) banding (J. Schmidt, written communication, 2001). U.S. Geological Survey rock samples contain up to 2 parts per million gold, 228 parts per million zinc, 3 parts per million antimony, and 0.42 part per million mercury. (The 2-parts-per-million gold value is from an ICP analysis done by XRAL Laboratories; a fire assay of the same sample shows less than 0.005 part per million gold. The cause of the discrepancy is not known.)
Geologic map unit (-148.833757921708, 62.9595282720399)
Mineral deposit model Hot spring Au-Ag? (Cox and Singer, 1986; model 25a?)
Mineral deposit model number 25a?
Alteration of deposit Argillic(?) alteration of felsic volcanic rocks. Iron- and manganese-oxide(?) alteration.

Production and reserves

Workings or exploration Only surface sampling by U.S. Geological Survey (J. Schmidt, written communication, 2001).
Indication of production None

References