Unnamed (headwaters of the Chistochina River)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Zn
Other commodities Pb
Ore minerals chalcopyrite; galena; pyrite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-1
Latitude 63.1455
Longitude -144.4901
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 4,400 feet, 8 miles southeast of Mount Kimball. It is on moraine at the foot of an unnamed glacier at the head of the Chistochina River at the northeast corner of section 29 T. 16 N., R. 5 E., Copper River Meridian. This location is accurate.

Geologic setting

Geologic description

During reconnaissance work in 1978, Resource Associates of Alaska, Inc. discovered pyrite-rich float on a glacial moraine (R.A. Blakestad and others, unpublished Resource Associates of Alaska Inc. report, 1978). There is no indication of any follow-up work at this site. The occurrence is 2.5 miles down the glacier from the SM massive sulfide occurrence (MH316).
The rocks of the Hayes Glacier unit that hosts this occurrence consist of fine-grained phyllitic schist and mylonite derived from sedimentary and volcanic protoliths. The rocks locally display intense structural deformation due to their proximity to Denali Fault. The basal part of the unit consists of mafic- to intermediate-composition metavolcanic rocks; they are overlain by interbedded felsic metavolcanic rocks and extensive pelitic and graphitic metasedimentary rocks (Dashevsky and others, 2003).
Geologic map unit (-144.492334850729, 63.1451121302342)
Mineral deposit model Kuroko massive sulfide (Cox and Singer, 1986; model 28a).
Mineral deposit model number 28a

Production and reserves

Workings or exploration    During reconnaissance work in 1978, Resource Associates of Alaska, Inc. discovered pyrite-rich float on a glacial moraine (Rodney A. Blakestad and others, unpublished Resource Associates of Alaska Inc. report, 1978). There is no indication of any follow-up work at this site.
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Unpublished data cited is available for viewing by contacting Grayd Resources Inc. in Vancouver, B. C., Canada (www.grayd.com), or Northern Associates Inc. in Fairbanks,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