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  3. Alaska Resource Data File (ARDF)

Kings River

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; malachite

Geographic location

Quadrangle map, 1:250,000-scale AN
Quadrangle map, 1:63,360-scale D-4
Latitude 61.95
Longitude -148.5
Nearby scientific data Find additional scientific data near this location
Location and accuracy Reported by Jasper (1965) to be north of east fork of Kings River. Accuracy is poor, but based on the geologic map of Winkler (1992) the coordinates should be within a 2.5 mile radius.

Geologic setting

Geologic description

Jasper (1965) reports that a prospector noted occasional blebs of malachite and chalcopyrite in and above a Late Triassic(?) unfossiliferous and massive to poorly bedded limestone. Locally the limestone occurs as lenses as much as 30 m thick in shear zones within the Early Jurassic to Late Triassic(?) Talkeetna Formation. The extent of mineralization is not known. When Brooks (1918) first reported this occurrence he reported, based on vague data, that the deposit was similar to the occurrence on Moose Creek (ARDF number AN066).
Geologic map unit (-148.502219790386, 61.9494688693844)
Age of mineralization Late Triassic (?) or younger; the mineralization is in limestones within the Early Jurassic to Late Triassic(?) Talkeetna Formation.
Alteration of deposit Oxidation of Cu minerals.

Production and reserves

Workings or exploration The extent of mineralization is not known (Jasper, 1965).
Indication of production None

Additional comments

Location and geologic descriptions in reports are vague.

References

MRDS Number A106242

References

Jasper, M.W., 1965, Geochemical investigations of selected areas in south-central Alaska, 1964: Alaska Division of Mines and Minerals Geochemical Report 4, 31 p.
Reporters D.P. Bickerstaff (USGS contractor); S.W. Huss (USGS)
Last report date 7/30/1998