Wells Bay No. 4

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; As; Au
Ore minerals arsenopyrite; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale AN
Quadrangle map, 1:63,360-scale A-2
Latitude 61.05
Longitude -147.4
Nearby scientific data Find additional scientific data near this location
Location and accuracy On south facing slope above the northernmost drainage of Wells Bay. At 2,000 ft elevation, 2.1 miles north-northeast of the tidal flats in northern Wells Bay. Accurate within 3,000 ft. Locality A-11 of Jansons and others (1984).

Geologic setting

Geologic description

Jansons and others (1984) reported a 30-ft-wide, more than 100-ft-long shear zone in graywacke of the Tertiary Orca Group. The shear zone contains fractured graywacke cemented by pyrite, arsenopyrite, and quartz. Eight grab samples contained up to .012 oz/ton Au, less than 0.2 to 0.6 oz/ton Ag, and up to 0.2 percent As.
Geologic map unit (-147.402075256955, 61.0494694854772)
Age of mineralization Paleocene or younger; shear zone cuts graywacke of the Tertiary Orca Group.

Production and reserves

Workings or exploration Eight grab samples contained up to .012 oz/ton Au, less than 0.2 to 0.6 oz/ton Ag, and up to 0.2 percent As. Jansons and others (1984) indicate low potential for mineral development.
Indication of production None

References

MRDS Number A106208
Reporters D.P. Bickerstaff (USGS contractor); S.W. Huss (USGS)
Last report date 7/30/1998