Ikuk Prospect, Goodnews Bay, Bethel Census Area, Alaska, USAi

Regional Level Types
Ikuk Prospect	Prospect
Goodnews Bay	City
Bethel Census Area	Census Area
Alaska	State
USA	Country

Location: This prospect is on the divide between the headwaters of an unnamed north tributary to the Tunulik River and the Barnum Creek drainage. The prospect is in a saddle at an elevation of about 1,500 feet and about 1 mile west of a 2,298-foot summit of Ikuktlitlig Mountain It is locality 3 of Kilburn and others (1993).
Geology: A composite mafic to felsic pluton intrudes Paleozoic to Mesozoic sedimentary and volcanic rocks in this area (Hoare and Coonrad, 1978). Surface observations completed for Calista Corporation (unpublished data), identified peridotite, diorite, granodiorite, and quartz monzonite in the intrusive complex. A variably silicified, choritized, and biotite-altered, 800-foot-wide fractured zone in diorite contains chalcopyrite, arsenopyrite, pyrrhotite, and pyrite (Fechner, 1988, 61). Rock samples from the prospect contain up to 2.4 percent Cu, 25.2 ppm Ag, 0.16 ounce of gold per ton, and 0.99 percent As.
Workings: Reconnaissance surface observations and sampling have been completed in the prospect area.
Age: Not known. The age of the host intrusive rock is probably Jurassic or Late Cretaceous/Early Tertiary, the age of other intrusive rocks in the region (Hoare and Coonrad, 1978).
Alteration: Silicification, chloritization, and biotite replacement (?).

Commodities (Major) - Ag, Au, Cu
Development Status: None
Deposit Model: Sulfide-bearing shear zone in diorite

Other Databases

Link to USGS - Alaska:	GO024

Other Regions, Features and Areas containing this locality

References