Unnamed

Occurrence, Undetermined

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale TL
Quadrangle map, 1:63,360-scale C-5
Latitude 62.522
Longitude -152.368
Nearby scientific data Find additional scientific data near this location
Location and accuracy Reed and others (1978, locality 18) show this occurrence approximately at the toe of a glacier at the 3000 foot elevation mark in the northeast quarter of Section 14, T. 28 N., R. 7 W., of the Seward Meridian within Denali National Park and Preserve.

Geologic setting

Geologic description

Pan concentrates containing visible gold are reported at this site by Reed and others (1978).
The area is underlain by Mesozoic marine sedimentary rocks (KJs) that have been intruded by the Upper Yentna pluton, a 65 to 66 m.y. old intrusive body that is one of the composite plutons (Tcp) described by Reed and Nelson (1980). These composite plutons form a 65-km-long curvilinear belt from Mt. Estelle in the south to Cascade Creek in the northeast. Anomalous gold, platinum-group elements, copper, chrome, nickel and arsenic are reported from these plutons (Reed and others, 1978; Reed and Nelson, 1980; Nelson and others 1992; Foley and others, 1997). Gold and platinum group element placers have been worked at sites downstream from these bodies (Mertie, 1919; Cobb, 1973). The occurrence lies near the convergent margin that places Paleozoic rocks over younger Mesozoic rocks (KJs) (Reed and Nelson, 1980). See also TL020, TL023, TL052, and TL053.
Geologic map unit (-152.370226623357, 62.5214359182892)
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 Reconnaissance mapping, prospecting, stream silt, pan concentrate and rock sampling are all that have been done here. Pan concentrates containing visible gold are reported at this site by Reed and others (1978). Anomalous gold, platinum-group elements, copper, chrome, nickel and arsenic are reported from these plutons (Reed and others, 1978; Reed and Nelson, 1980; Nelson and others 1992; Foley and others, 1997). Gold and platinum group element placers have been worked at sites downstream from these bodies (Mertie, 1919; Cobb, 1973).
Indication of production None

Additional comments

This site is located within Denali National Park and Preserve.

References