|Quadrangle map, 1:250,000-scale||PE|
|Quadrangle map, 1:63,360-scale||C-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at Boulder Point along Wrangell Narrows on northeastern Woewodski Island, about 0.4 mile east-southeast of the center of section 18, T. 61 S., R . 80 E. The location is accurate.|
Geologic descriptionThe rocks in the vicinity are part of the Triassic Hyd Group that consists mainly of volcanic flows and breccias, argillite, and some limestone (Brew, 1997; Karl and others, 1999). There is no indication of mineralization here other than Still and others (2002) collected samples of iron-stained andesite along several hundred feet of shoreline that locally contains pyrrhotite and chalcopyrite along fractures. The samples contained 246 to 929 parts per million copper.
|Geologic map unit||(-132.979517530988, 56.5809506327553)|
|Age of mineralization||Triassic or younger based on the age of the host rock.|
|Alteration of deposit||The andesite host rock is silicified.|
|Workings or exploration||No workings. Still and others (2002) collected samples as part of a regional mineral assessment by the Bureau of Land Management.|
|Indication of production||None|
Brew, D.A., 1997, Reconnaissance geologic map of the Petersburg C-4 quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 97-156-J, 21 p., 1 sheet, scale 1:63,360.
Karl, S.W., Haeussler, P.J., and McCafferty, A.E., 1999, Reconnaissance geologic map of the Duncan Canal-Zarembo Island area, southeastern Alaska: U.S. Geological Survey Open-File Report 99-0168, 30 p., 1 sheet, scale 1:150,000.
Still, J.C., Bittenbender, P.E., Bean, K.W., and Gensler, E.G., 2002, Mineral assessment of the Stikine area, central Southeast Alaska: U.S. Bureau of Land Management Technical Report 51, 560 p.
|Reporters||D.J. Grybeck (Port Ludlow, WA)|
|Last report date||3/4/2008|