Unnamed (north of Kimball Glacier)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Pb; Zn
Other commodities Ag
Ore minerals arsenopyrite; chalcopyrite; galena; pyrite; pyrrhotite; sphalerite; stibnite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale B-2
Latitude 63.2837
Longitude -144.6023
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 6,000 feet and one-half mile north of the Kimball Glacier and approximately 5 miles south of the terminus of the glacier at the head of the West Fork Robertson River. It is about 0.2 mile west-northwest of the center of section 12, T. 19 S., R. 16 E., Fairbanks Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence is in an area of a hydrothermal massive sulfide veins. The rocks are quartz-sericite schist with massive pyrite bands as much as 12 inches thick (R.A. Blakestad and others, unpublished Resource Associates of Alaska, Inc. report, 1978). Samples contain as much as 0.5 percent copper and lead, 1.8 percent zinc, and less than 1 ounce of silver per ton. No significant gold is reported, but it is not clear how many samples were analyzed for gold.
Geologic map unit (-144.604543878336, 63.2833166008977)
Mineral deposit model Polymetallic veins and Kuroko massive sulfide (Cox and Singer, 1986; model 22c, model 28a).
Mineral deposit model number 22c, 28a
Age of mineralization Devonian or younger, on the basis of the age of the host rock, which is in the Jarvis Creek Glacier subterrane (Nokleberg and others, 1992).

Production and reserves

Workings or exploration This occurrence has only had limited surface sampling.
Indication of production None

Additional comments

Unpublished data cited is available for viewing by contacting Grayd Resources Inc. in Vancouver, B. C., Canada (www.grayd.com), or Northern Associates Inc. in Fairbanks, Alaska.

References