Quadrangle map, 1:250,000-scale | LC |
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Quadrangle map, 1:63,360-scale | A-3 |
Latitude | 60.11 |
Longitude | -153.914 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | Locality is approximately 4 km S-SW of the mouth of Ospook Creek. This is locality 36 of Nelson and others (1985) and locality 35 of MacKevett and Holloway (1977). NE1/4 sec. 9, T. 1 S., R. 27 W., of the Seward Meridian. Location is accurate within 800 m. |
Geologic descriptionOccurrence is a very small area of strong epidote - quartz - magnetite - chalcopyrite veining within 0.9 m of the contact of Tertiary andesite porphyry breccia with fine-grained metasedimentary rocks. Resource Associates of Alaska (1976) report two rock samples taken near the metasediment-volcanic contact yielded values as high as 11.2 ppm Ag, 1,100 ppm Cu, 180 ppm Pb, and 680 ppm Zn. One nearby stream sediment sample showed slight anomaly (109 ppm Cu). However, these results could not be reproduced by Nelson and others (1985). | |
Geologic map unit | (-153.916190224858, 60.1093409402108) |
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Mineral deposit model | Cu skarn (Cox and Singer, 1986; model 18b) |
Mineral deposit model number | 18b |
Age of mineralization | Tertiary or younger, based on geologic relationships. |
Alteration of deposit | Unknown |
Workings or exploration | Resource Associates of Alaska (1976) report two rock samples taken near the metasediment-volcanic contact yielded values as high as 11.2 ppm Ag, 1,100 ppm Cu, 180 ppm Pb, and 680 ppm Zn. One nearby stream sediment sample showed slight anomaly (109 ppm Cu). However, these results could not be reproduced by Nelson and others (1985). |
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Indication of production | None |
Reserve estimates | No reserves |
Production notes | No production |
Additional commentsMineralization very sparse. Site is in Lake Clark National Park and Preserve. |
MRDS Number | A013018 |
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ReferencesResource Associates of Alaska, Inc., 1976, Geology and geochemistry of certain land within the Lake Clark National Park: Contract report for U.S. Bureau of Mines, Contract JO166108, 7 v.
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Reporters | M.L. Miller (USGS); D.P. Bickerstaff (USGS) |
Last report date | 6/15/1998 |