|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 prospect is located between 1,380 to 1,465 feet elevation in the NE1/4 section 14, T. 1 S., R. 7 E., of the Seward Meridian. It is on the northeast side of Hogg Bay on Bainbridge Island. This is location 273 of Cobb and Tysdal (1980) and location S-24 of Jansons and others (1984). This location is accurate to 1,000 feet.|
The prospect consists of sulfide-bearing quartz stringers near the contact of a sheared greenstone and silicified mudstone of the Orca Group of early Tertiary age (Cobb and Tysdal, 1980). The greenstone and mudstone strike northeast to northwest and dip 27 to 65 W. The mineralization consists chiefly of limonite gossan with traces of chalcopyrite, pyrite, and pyrrhotite.Workings consist of two adits, one 220 feet long, the other 405 feet long, along with a 40- by 10-foot open cut (Smith, 1926). Samples collected from the 220-foot adit and the open cut contained between 23 ppm and 0.07 percent copper and a trace to 0.11 ppm gold (Kurtak and Jeske, 1986).
|Geologic map unit||(-148.196635168686, 60.0932457025806)|
|Mineral deposit model||Cyprus massive sulfide (Cox and Singer, 1986; model 24a)|
|Mineral deposit model number||24a|
|Age of mineralization||Tertiary or younger; the mineralization is in rocks of the Orca Group of Tertiary age.|
|Alteration of deposit||The mudstone is silicified, and the surface rock is leached and iron-stained (Kurtak and Jeske, 1986).|
|Workings or exploration||Workings consist of two adits and a 40- by 10-foot open cut. One adit is 220 feet long and the other is 405 feet (Smith, 1926). Samples collected from the 220-foot adit and the open cut contained between 23 ppm and 0.07 percent copper and a trace to 0.11 ppm gold (Kurtak and Jeske, 1986).|
|Indication of production||None|
Cobb, E.H., and Richter, D.H., 1972, Metallic mineral resources map of the Seward quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-466, 2 sheets, scale 1:250,000.
Cobb, E.H., and Tysdal, R.G., 1980, Summaries of data on and list of references to metallic and selected nonmetallic mineral deposits in the Blying Sound and Seward quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-621, 276 p.
Condon, W.H., and Cass, J.T., 1958, Map of a part of the Prince William Sound area, Alaska, showing linear geologic features as shown on aerial photographs: U.S. Geological Survey Miscellaneous Investigations Series Map I-273, 1 sheet, scale 1:125,000.
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.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
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.
Smith, P.S., 1926, Mineral industry of Alaska in 1924: U.S. Geological Survey Bulletin 783-A, p. 1-30.
|Reporters||Jeff A. Huber and Carol S. Huber (Anchorage)|
|Last report date||11/21/2000|