|Quadrangle map, 1:250,000-scale||SR|
|Quadrangle map, 1:63,360-scale||A-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The occurrence is located on the south side of the head of Swanson Bay, which is in the southern part of Bainbridge Island. It is in the NE1/4 section 2, T. 2 S., R. 7 E., of the Seward Meridian. This is location 275 of Tysdal (1978 [MF-880-A]) and location S-22 of Jansons and others (1984). This location is accurate to within 300 feet.|
Geologic descriptionThe occurrence consists of as much as 1 percent disseminated pyrite and pyrrhotite in basaltic greenstone and siliceous shale and slate. Samples from the occurrence contained as much as 100 ppm copper and 200 ppm zinc (Kurtak and Jeske, 1986). Nelson and others (1985) mapped bedrock in this area as Orca Group of early Tertiary age.
|Geologic map unit||(-148.198438340785, 60.0341464572131)|
|Mineral deposit model||Besshi massive sulfide (Cox and Singer, 1986; model 24b)|
|Mineral deposit model number||24b|
|Age of mineralization||Tertiary or younger; the mineralization is in rocks of the Orca Group of Tertiary age.|
|Workings or exploration||Samples from the occurrence contained as much as 100 ppm copper and 200 ppm zinc (Kurtak and Jeske, 1986).|
|Indication of production||None|
Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, southcentral Alaska: U.S. Bureau of Mines Mineral Land Assessment 5-84, 218 p., 2 sheets, scale 1:250,000.
Kurtak, J.M., and Jeske, R.E., 1986, Mineral investigations in the Chugach National Forest, Alaska (Islands area): U.S. Bureau of Mines Open-File Report 54-86, 302 p., 1 sheet, scale 1:63,360.
Nelson, S.W., Dumoulin, J. A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-B, 16 p., 1 sheet, scale 1:250,000.
|Reporters||Jeff A. Huber and Carol S. Huber (Anchorage)|
|Last report date||11/29/2001|