|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||The Nicirque prospect is about 2.5 miles northeast of Grief Island in Duncan Canal at an elevation of about 2,300 feet. It is about 0.4 mile north-northeast of the center of section 30, T. 60 S., R. 59 E. The location is accurate to within one-quarter mile.|
Geologic descriptionThe Nicirque prospect was staked in 1993 and was active at least as recently as 1998 (Still and others, 2002). It is near the fault contact of the Permian and Mississippian Cannery Formation with volcanic and sedimentary rocks of the Triassic Hyd Group (Karl and others, 1999). A fossil find at the prospect indicates that it may be in slate of Hyd Group. The mineralization is reportedly a massive pyrite vein in a breccia zone. Still and others (2002) collected a sample across three feet of slate with pyrite bands. The sample contained 56 parts per billion gold, 2.6 parts per million (ppm) silver, and 333 ppm zinc.
|Geologic map unit||(-133.029820034002, 56.646650886217)|
|Mineral deposit model||Pyrite bands in slate.|
|Age of mineralization||Possibly Triassic based on the age of the host rock.|
|Workings or exploration||There is no record of work at this prospect other than that it was first staked in 1983 and that the Bureau of Land Management examined the it and collected a sample.|
|Indication of production||None|
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||4/8/2007|