Unnamed (on Kaiyuh Hill)

Occurrence, Probably inactive

Commodities and mineralogy

Main commodities Ag; Pb
Gangue minerals limonite

Geographic location

Quadrangle map, 1:250,000-scale NL
Quadrangle map, 1:63,360-scale A-4
Latitude 64.11
Longitude -157.93
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence, informally called the Kaiyuh Ridge gossan, is in the southern Kaiyuh Mountains. It is at an elevation of about 2500 feet, 0.9 mile due west of VABM Kalyuh Hill. VABM Kalyuh Hill is approximately 5 miles south-southwest of the summit of Khotol Mountain. The location is accurate within 2 miles.

Geologic setting

Geologic description

This occurrence is a weakly mineralized limonite gossan in garnet-chlorite-quartz schist and quartz-amphibole schist. The gossan occurs along a north-south-trending shear zone. Samples contain up to 10.0 ppm silver and 550 ppm lead (Flanigan, 1998).
Also see NL012-016 and NL020-022.
Geologic map unit (-157.932441245232, 64.109344217661)
Mineral deposit model Gossan with Ag and Pb values
Age of mineralization Flanigan (1998) interprets this gossan to be related to magmatic fluids from the Khotol pluton, based on its proximity to the pluton and its low molybdenum content . K-Ar and Ar/Ar dates for the Khotol pluton are approximately 110 Ma (Flanigan, 1998).

Production and reserves

Workings or exploration This occurrence was discovered by Anaconda Minerals Company in 1980 (Flanigan, 1998).
Indication of production None


MRDS Number 10307897


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