Unnamed

Prospect, Undetermined

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale LC
Quadrangle map, 1:63,360-scale B-8
Latitude 60.39
Longitude -155.9
Nearby scientific data Find additional scientific data near this location
Location and accuracy About 6.8 km west-northwest of VABM Overlook, where generally northward flowing tributaries enter the Mulchatna River. Sec. 32, T. 4 N., R. 38 W., of the Seward Meridian. Locality accurate within 1.6 km.

Geologic setting

Geologic description

Only information is that 162 placer gold claims were staked here near the Mulchatna River (U.S. Bureau of Mines, 1973).
The most abundant bedrock in the areas upstream of the claims is a Jurassic to Cretaceous flysch sequence (Nelson and others, 1983; unit KJs). Unit KJs is described as interbedded lithic graywacke, silty sandstone, black shale, and local conglomerate. Irregular quartz segregations and veinlets are locally present. Scattered stocks and locally abundant dikes of intermediate to felsic composition intrude these sedimentary rocks. Adjacent to some of the larger igneous bodies are narrow contact aureoles of pelitic hornfels. Unit KJs is intruded (locally) by various Cretaceous to Tertiary plutons. The plutons include quartz monzonite, monzodiorite, grano-diorite, diorite, and rhyolite dikes. Also present is Unit Tv of Nelson and others (1983) which includes rhyolitic breccia, ash-flow tuff, flows, and intrusive rocks and subordinate mafic to intermediate flows. Potassium-argon ages for unit Tv range from 56.2 to 62.7 m.y. indicating a Tertiary age for these rocks (Eakins and others, 1978).
Geologic map unit (-155.902235301747, 60.3893051243786)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a
Age of mineralization Quaternary.
Alteration of deposit Not applicable

Production and reserves

Workings or exploration Unknown
Indication of production Undetermined
Reserve estimates No reserves.
Production notes No production.

Additional comments

Cobb and Reed (1981) mention gold in most river bars of the Mulchatna River, with most prospecting occurring around the late 1890s or early 1900s.

References