Unnamed (near mouth of Harding River)

Prospect, Probably inactive

Commodities and mineralogy

Main commodities Ag; Au; Cu; Zn
Ore minerals chalcopyrite; pyrite; pyrrhotite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale BC
Quadrangle map, 1:63,360-scale A-5
Latitude 56.2025
Longitude -131.6379
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is at an elevation of about 40 feet on the west side of a small bight about 0.7 mile west-southwest of the mouth of the Harding River on Bradfield Canal. It is about 0.3 mile southwest of the center of section 27, T. 69 S., R. 89 E., of the Copper River Meridian. The location is accurate.

Geologic setting

Geologic description

As first described by Roehm (1942) and sampled by Still and others (2002), this prospect is an old opencut and probably the best mineralization in the several shear zones along Bradfield Canal in this area. The prospect is near the contact zone between the Eocene Coast Mountains batholith and metamorphic rocks. As described by Roehm (1942), the shear zone at this open cut has a hanging wall of mica schist or gneiss and a footwall of marble. A quartz vein about 0.5 to 1 foot thick occurs along the shear for about 20 feet of the opencut. The vein contains 1 to 2 percent sulfides, mainly pyrrhotite with pyrite and chalcopyrite. Still and others (2002) collected several samples; the highest values were 17 parts per billion gold, 1.8 part per million (ppm) silver, 197 ppm copper, and 235 ppm zinc.
Geologic map unit (-131.639591790737, 56.2021438690681)
Mineral deposit model Quartz vein with low values of gold, silver, copper, and zinc.

Production and reserves

Workings or exploration A short opencut was dug before 1942 and there was limited sampling by government geologists about 2000.
Indication of production None

References

References

Still, J.C., Bittenbender, P.E., Bean, K.W., and Gensler, E.G., 2002, Mineral assessment of the Stikine area, central southeast Alaska: Bureau of Land Management Technical Report 51, 560 p.
Reporters D.J. Grybeck (Port Ludlow, WA)
Last report date 3/4/2008