Unnamed (on the Kichatna River)

Prospect, Undetermined

Commodities and mineralogy

Main commodities Au; Pt
Ore minerals gold; platinum

Geographic location

Quadrangle map, 1:250,000-scale TL
Quadrangle map, 1:63,360-scale A-4
Latitude 62.153
Longitude -151.749
Nearby scientific data Find additional scientific data near this location
Location and accuracy Clark and Cobb (1972, locality 11) locate this placer prospect at the confluence of the Nakochna River and the Kichatna River in the southeast quarter of Section 24, T. 24 N., R. 14 W., of the Seward Meridian. Reed and others (1978) show this prospect as locality 39.

Geologic setting

Geologic description

Reed and others (1978) describe this site as an old placer prospect on river bars, chiefly for platinum. There is no evidence that the 1917 dredging operation at this site was productive. Cobb and Reed (1980) report some fine gold was recovered from the Nakochna River. No other published data are available.
The sources of platinum may be the ultramafic rocks of the composite plutons (Tcp) described by Reed and Nelson (1980) that extend from Mt. Estelle in the Tyonek quadrangle to the headwaters of Cascade Creek. Anomalous gold, platinum-group elements, copper, chrome, nickel and arsenic are reported from the composite plutons (Reed and others, 1978; Reed and Nelson, 1980; Nelson and others, 1992). Gold and platinum group element placers have been worked at sites downstream from these bodies (Mertie, 1919; Cobb, 1973).
Also see TL020, TL023, TL052, and TL05.
Geologic map unit (-151.751241778204, 62.1524507367515)
Mineral deposit model Placer Au-PGE (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Pleistocene.

Production and reserves

Workings or exploration According to Reed and others (1978) this was a former dredge site.
Indication of production Undetermined

References

MRDS Number A011550; M045410

References

Reporters Madelyn A. Millholland (Millholland & Associates)
Last report date 8/10/1998