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Upper Tazimina

Occurrence, Inactive

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Commodities and mineralogy

Main commodities Cu
Other commodities Ag; Pb; Zn
Ore minerals chalcopyrite; magnetite
Gangue minerals epidote; quartz

Geographic location

Quadrangle map, 1:250,000-scale LC
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 setting

Geologic description

Occurrence 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)
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

Production and reserves

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).
Indication of production None
Reserve estimates No reserves
Production notes No production

Additional comments

Mineralization very sparse. Site is in Lake Clark National Park and Preserve.

References

MRDS Number A013018

References

Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska; Supplement to Open-File Report 76-485; Part A, Summaries to January 1, 1981: U.S. Geological Survey Open-File Report 81-1343-A, 25 p.
Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska; Supplement to Open-File Report 76-485; Part B, Lists of references to Januray 1, 1981: U.S. Geological Survey Open-File Report 81-1343-B, 20 p.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.
Nelson, W.H., King, H.D., Case, J.E., Tripp, R.B., Crim, W.D., and Cooley, E.F., 1985, Mineral resource map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1114-B, 1 sheet, scale 1:250,000.
Resource 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.
Reporters M.L. Miller (USGS); D.P. Bickerstaff (USGS)
Last report date 6/15/1998