|Quadrangle map, 1:250,000-scale||SW|
|Quadrangle map, 1:63,360-scale||D-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is in T. 37 S., R. 50 W., of the Seward Meridian, east of Yantarni Creek (MacKevett and Holloway, 1977, locality 5). Site location is accurate to within 2 miles.|
Geologic descriptionThis site is marked by a color anomaly which coincides with a diorite stock (Detterman and others, 1981; Cox and others 1981). The stock, dated at 32-40 million years, intrudes the Jurassic Naknek and the Eocene and Paleocene Tolstoi Formations (Detterman and others, 1981). The diorite is reported to be altered and to contain disseminated porphyry-type mineralization (MacKevett and Holloway, 1977). The main drainage in the area is anomalous in zinc (Cox and others, 1981). No mention is made of ore or gangue minerals.
|Geologic map unit||(-157.302057375091, 56.8992524735252)|
|Mineral deposit model||Porphyry copper (Cox and Singer, 1986, model 17)|
|Mineral deposit model number||17|
|Age of mineralization||Tertiary.|
|Alteration of deposit||Color anomaly associated with diorite stock.|
|Indication of production||None|
Additional commentsThis site is located 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|