Unnamed (on northeast bank of Holokuk River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Ag; As; Cu; Sb
Ore minerals pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SM
Quadrangle map, 1:63,360-scale B-7
Latitude 61.4074
Longitude -158.34661
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the northeast bank of the Holokuk River about 1.0 mile northwest of the mouth of Beemguiga Creek. The occurrence is at an elevation of about 380 feet, about 0.3 mile northwest of the center of section 12, T. 15 N., R. 51 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence consists of a zone of quartz stringers adjacent to a swarm of granite-porphyry dikes that intrudes sandstone and shale of the Upper Cretaceous, Kuskokwim Group (Cady and others, 1955; T.K. Bundtzen, unpublished field data, 1999). The largest dike strikes N45E and is about 30 feet wide. One grab sample of a quartz stringer contained 141 parts per billion (ppb) gold, 138 parts per million (ppm) arsenic, 200 ppb silver, 21 ppm antimony, and 118 ppm copper (T.K. Bundtzen, unpublished analytical data, 1999).
Geologic map unit (-158.348965983619, 61.4066887579842)
Mineral deposit model Polymetallic vein? (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c?
Alteration of deposit Sericite alteration in dikes.

Production and reserves

Workings or exploration The U.S. Geological Survey sampled the site in 1999.
Indication of production None

References

References

Reporters T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.) and M.L. Miller (U.S. Geological Survey)
Last report date 5/10/2003