Unnamed (northeast of upper Eddy Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Zn
Other commodities Ag; Mo

Geographic location

Quadrangle map, 1:250,000-scale NL
Quadrangle map, 1:63,360-scale A-4
Latitude 64.25
Longitude -157.5
Nearby scientific data Find additional scientific data near this location
Location and accuracy The approximate location of this occurrence, informally called 'R-0582 gossan,' is about 2 miles northeast of upper Eddy Creek. For this record, the site is plotted in the southwest corner of sec. 28, T. 14 S., R. 7 E., Kateel River Meridian. The location is accurate within 5 miles.

Geologic setting

Geologic description

This occurrence consists of scattered gossan in variably graphitic quartz schist adjacent to a greenstone(?) dike (Flanigan, 1998). Seven rock samples contained up to 191 ppm copper, 373 ppm zinc, 1.1 ppm silver, and 62 ppm molybdenum. Flanigan (1998) suggests that this occurrence is probably related to the Round Top (NL011) quartz monzonite intrusive complex, for which K-Ar and Ar/Ar dates indicate cooling at approximately 75 Ma.
Also see NL002, 008, 010, and 011.
Geologic map unit (-157.502450750581, 64.249352207792)
Mineral deposit model Plutonic-related Cu-Zn
Age of mineralization Flanigan (1998) suggests that this occurrence is probably related to the Round Top (NL011) quartz monzonite intrusive complex, for which K-Ar and Ar/Ar dates indicate cooling at approximately 75 Ma.

Production and reserves

Workings or exploration This occurrence was discovered by the Anaconda Mineral Company between 1980 and 1982 (Flanigan, 1998).
Indication of production None

References

MRDS Number 10307902

References

Flanigan, B., 1998, Genesis and mineralization of ore deposits in the Illinois Creek region, west central Alaska: University of Alaska, Fairbanks, M.Sc. thesis, 125 p., 2 plates.
Reporters C.E. Cameron (Northern Associates, Inc.)
Last report date 8/7/2001