|Quadrangle map, 1:250,000-scale||HE|
|Quadrangle map, 1:63,360-scale||A-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 4,500 feet on the south wall of the valley of Windy Creek. It is near the north end of the boundary bwtween secs. 15 and 16, T. 21 S., R. 2 E., of the Fairbanks Meridian. The site is shown as site 30 in Smith (1981). The location is accurate to within 500 feet.|
The bedrock in the area of this occurrence is mainly the Middle or Upper Triassic Nikolai Greenstone, a thick sequence of subaerial and submarine basalt flows and minor interbedded volcaniclastic sedimentary rocks, aquagene and epiclastic tuff, breccia, argillite, and radiolarian chert (Nokleberg and others, 1992).
This small mineral occurrence consists of a small shear zone along which hydrothermal alteration has produced epidote, chalcopyrite, and iron carbonate minerals. Weathering produces malachite- and azurite-coated float and encrustations.This small mineral occurrence is one of many similar deposits in the Nikolai Greenstone. Most of these occurrences are part of an east-northeast trending fault zone several miles wide.
|Geologic map unit||(-147.356254755668, 63.099551249666)|
|Mineral deposit model||Hydrothermally altered shear zone.|
|Age of mineralization||Triassic or younger.|
|Alteration of deposit||Propylitic alteration of greenstone.|
|Indication of production||None|
Additional commentsThis occurrence is about 0.25 miles southeast of HE187.
Glavinovich, P.S., 1967, Trace element copper distribution and areal geology in a portion of the Clearwater Mountains, Alaska: University of Alaska, Minerals Industry Research Laboratory, Report No. 10, 55 p.
|Reporters||D.L. Stevens (Stevens Exploration Management Corporation)|
|Last report date||4/7/2000|