|Quadrangle map, 1:250,000-scale||LC|
|Quadrangle map, 1:63,360-scale||B-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Approximately 5.6 km north of Kijik Mountain, near peak 3,180. Locality 19 of Nelson and others (1985) and locality 27 of MacKevett and Holloway (1977). Sec. 35, T. 4 N., R. 29 W., of the Seward Meridian. Locality accurate within 1.6 km.|
Geologic descriptionArea of widespread zinc and trace lead anomalies associated with silicified zones in felsic volcanic rocks. Several zones of intense fracturing and iron-staining contain 1 percent to 3 percent pyrrhotite or pyrite. Samples taken from zones of intense fracturing and iron-staining yielded values of 220 to 260 ppm Zn (Resource Associates of Alaska, 1976). The volcanic rocks include: rhyolitic breccia, ash-flow tuff, flows, and intrusive rocks and subordinate mafic to intermediate flows (Nelson and others, 1983; unit Tv). Potassium-argon ages for Unit Tv range from 56.2 to 62.7 m.y. indicating a Tertiary age for these rocks (Eakins and others, 1978).
|Geologic map unit||(-154.282225973463, 60.3893331490157)|
|Mineral deposit model||Kuroko massive sulfide? (Cox and Singer, 1986; model 28a?).|
|Mineral deposit model number||28a?|
|Age of mineralization||Tertiary; volcanic host for mineralization has potassium-argon ages that range from 56.2 to 62.7 m.y. (Eakins and others, 1978).|
|Alteration of deposit||Iron-staining, silicic alteration, and slight chloritic alteration of volcanic rocks (Resource Associates of Alaska, 1976).|
|Workings or exploration||Samples taken from zones of intense fracturing and iron-staining yielded values of 220 to 260 ppm Zn (Resource Associates of Alaska, 1976).|
|Indication of production||None|
|Reserve estimates||No reserves|
|Production notes||No production|
Additional commentsSite is in Lake Clark National Park and Preserve.
Eakins, G.R., Gilbert W.G., and Buntzen, T.K., 1978, Preliminary bedrock geology and mineral resource potential of west-central Lake Clark quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Open-File Report 118, 15 p., 2 plates, scale 1:25,000.
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., Carlson, C., and Case, J.E., 1983, Geologic map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1114-A, 1 sheet, scale 1:250,000.
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|