|Quadrangle map, 1:250,000-scale||PE|
|Quadrangle map, 1:63,360-scale||C-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect consists of several cuts in the banks of 'Brushy Creek' between elevations of 90 to 170 feet. Brushy Creek is the informal name given to the creek that flows southwest, about 1.3 miles northwest of the southern tip of Woewodski Island. The coordinates are at about the center of the workings which trend southwest through the southwest quarter of section 1, T. 61 S., R. 79 E. The location is accurate.|
During the middle 1990s, Westmin Resources was active on Brushy Creek near the southern tip of Woewodski Island.). They excavated a series of cuts along the creek bank for about 3,000 feet between elevations of 90 to 170 feet and collected gridded soil samples over the area.The rocks in the area are greenstone and greenschist of the Triassic Hyd Formation (Brew, 1997; Karl and others, 1999). Still and others (2002) collected samples in the cuts of iron-stained silicified volcanic rocks with thin bands of and disseminated pyrite, sphalerite, and galena. The best, a 2-foot chip sample, contained 423 parts per billion gold, 27.9 parts per million (ppm) silver, 7,380 ppm lead, and 2.6 percent zinc. Six others contained 1,731 ppm to 2.2 percent zinc.
|Geologic map unit||(-133.020522092927, 56.5200540239229)|
|Mineral deposit model||Volcanogenic massive sulfide deposit.|
|Age of mineralization||Late Triassic based on the age of the host rock and similarities to massive sulfide deposits in the Duncan-Zarembo belt of mineralization.|
|Alteration of deposit||Volcanic rocks near the mineralization are silicified.|
|Workings or exploration||During the middle 1990s, Westmin Resources was active on Brushy Creek near the southern tip of Woewodski Island. They excavated a series of cuts along the creek bank for about 3,000 feet between elevations of 90 to 170 feet and collected gridded soil samples over the area. Still and others (2002) sampled the area as part of a regional mineral assessment for 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||H. C. Berg (Fullerton, California); D.J. Grybeck (Port Ludlow, WA)|
|Last report date||3/4/2008|