Unnamed (McClure Bay)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Zn
Ore minerals chalcopyrite; pyrite; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale C-4
Latitude 60.5053
Longitude -148.1837
Nearby scientific data Find additional scientific data near this location
Location and accuracy The occurrence is located in the SW1/4 section 23, T. 5 N., R. 7 E., of the Seward Meridian. It is situated on or near the west shore of McClure Bay, just east of hill 1692. This is location 112 of Tysdal (1978 [MF-880-A]) and location S-96 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

There is much confusion in the literature about this occurrence. Tysdal (1978 [MF-880-A]) described it as a small iron-stained breccia zone in sandstone containing 100 ppm zinc. Jansons and others (1984) describe this occurrence as thin vuggy quartz veins about 1 inch wide containing pyrite and chalcopyrite in interbedded shale and graywacke of the Tertiary Orca Group. No workings exist.
Geologic map unit (-148.185752673845, 60.5046878117871)
Age of mineralization Tertiary or younger; the occurrence is in Orca Group rocks of Tertiary age.
Alteration of deposit Iron staining.

Production and reserves

Workings or exploration Tydsal (1978 [MF-880-A]) reported 100 ppm zinc in iron-stained breccia.
Indication of production None

Additional comments

Tysdal (1978 [MF-880-A]) and Jansons and others (1984) located this occurrence in the same spot, but their descriptions do not match.

References