|Quadrangle map, 1:250,000-scale||SW|
|Quadrangle map, 1:63,360-scale||C-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This site is located on the eastern tip of Sutwik Island near Foggy Cape (MacKevett and Holloway, 1977, locality 6). Site location is accurate to within 2 miles.|
Geologic descriptionThe rocks at this site consist of basaltic plug domes intruding sedimentary strata of the Meshik Formation (Detterman and others, 1981). The site has been described as a porphyry-type occurrence consisting of a strongly altered zone in Tertiary hypabyssal and volcanic rocks (MacKevett and Holloway, 1977). No mention is made of ore or gangue minerals present.
|Geologic map unit||(-156.902033816558, 56.4992594436595)|
|Mineral deposit model||Porphyry copper (Cox and Singer, 1986, model 17)|
|Mineral deposit model number||17|
|Age of mineralization||Tertiary.|
|Alteration of deposit||The alteration is unknown but it probably includes propylitic and sericitic types.|
|Indication of production||None|
Additional commentsThis site is on land selected by the Koniag Native Corporation.
Cox, D.P., Detra, D.E., and Detterman, R.L., 1981, Mineral resource maps of the Chignik and Sutwik Island quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF- 1053-K, 2 sheets, scale 1:250,000.
Detterman, R.L., Miller, T.P., Yount, M.E., and Wilson, F.H.,1981, Geologic map the Chignik and Sutwik Island quadrangles Alaska: U.S. Geologic Survey Miscellaneous Investigations Series Map I-1229, 1 sheet, scale 1:250,000.
|Reporters||S.H. Pilcher (Anchorage)|
|Last report date||1/31/2000|