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

Unnamed (east of upper Bear Creek)

Occurrence, Inactive

Map
KML
XML
GeoJSON

Commodities and mineralogy

Main commodities Au
Other commodities Cr
Ore minerals unspecified sulfide mineral
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SM
Quadrangle map, 1:63,360-scale C-7
Latitude 61.6437
Longitude -158.48391
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on a west-facing slope about 0.5 mile west of hill 1379. It is at an elevation of about 750 feet in the SW1/4 sec. 14, T. 18 N., R. 51 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence consists of a chalcedony-cemented breccia in a flow of fine-grained, dark gray basalt or basaltic andesite (Bundtzen and others, 1998). The breccia contains 1-2 percent, finely disseminated sulfides in both quartz veinlets and in mafic volcanic rock. One grab sample contained 880 parts per billion gold and 200 parts per million chromium (Bundtzen and others, 1998). The elevated chromium probably represent the background of the host rocks.
Geologic map unit (-158.486284301951, 61.6429932285353)
Alteration of deposit Chalcedony.

Production and reserves

Workings or exploration Surface sampling was conducted by the Alaska Division of Geological and Geophysical Surveys in 1992 (Bundtzen and others, 1998).
Indication of production None

References

References

Bundtzen, T.K., Harris, E.E., Miller, M.L., Layer, P.W., and Laird, G.M., 1998, Geology of the Sleetmute C-7, C-8, D-7, and D-8 quadrangles, Horn Mountains, southwestern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 98-12, 38 p., one sheet, scale 1:63,360.
Cady, W.M., Wallace, R.E., Hoare, J.M., and Webber, E.J., 1955, The central Kuskokwim region, Alaska: U.S. Geological Survey Professional Paper 268, 132 p.
Reporters T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.) and M.L. Miller (U.S. Geological Survey)
Last report date 5/8/2003