|Quadrangle map, 1:250,000-scale||PE|
|Quadrangle map, 1:63,360-scale||A-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The coordinates are at the approximate center of ten claims at five locations that were staked for copper in 1956; apparently they have not been active since.|
Geologic descriptionTen claims at five locations were staked for copper in 1956 on the Niblack Islands in Ernest Sound; apparently they have not been active since (U.S. Bureau of Mines, 1980). A brief examination by the USGS in 1979 did not reveal any signs of mineral deposits (Grybeck, Berg, and Karl, 1984, locality 79). Rocks in the vicinity consist largely of migmatite and granite (Brew and others, 1984). The islands were also searched for indications of mineralization by Still and others, 2002; they found nothing other than a sample of granite that may have had a copper content a bit above background.
|Geologic map unit||(-132.104785514034, 56.0388576225668)|
|Workings or exploration||Ten claims at five locations were staked for copper in 1956 on the Niblack Islands in Ernest Sound; apparently they have been not active since (U.S. Bureau of Mines, 1980). Several attempts by government geologists and engineers to find evidence of mineralization have been fruitless.|
|Indication of production||None|
Brew, D.A., Ovenshine, A.T., Karl, S.M., and Hunt, S.J., 1984, Preliminary reconnaissance geologic map of the Petersburg and parts of the Port Alexander and Sumdum 1:250,000 quadrangles, southeastern Alaska: U.S. Geological Survey Open-File Report 84-405, 43 p., 2 sheets, scale 1:250,000.
Grybeck, D.J., Berg, H.C., and Karl, S.M., 1984, Map and description of the mineral deposits in the Petersburg and eastern Port Alexander quadrangles: U.S. Geological Survey Open-File Report 84-837, 86 p., 1 sheet, scale 1:250,000.
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.
U.S. Bureau of Mines, 1980, Claim map, Petersburg quadrangle, Alaska: U.S. Bureau of Mines Map 117, 1 sheet, scale 1:250,000.
|Reporters||D.J. Grybeck (Port Ludlow, WA)|
|Last report date||4/8/2007|