Main commodities | Zn |
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Other commodities | Ag; Pb |
Ore minerals | pyrite; pyrrhotite |
Quadrangle map, 1:250,000-scale | LC |
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Quadrangle map, 1:63,360-scale | B-4 |
Latitude | 60.39 |
Longitude | -154.28 |
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) |
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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). |
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Indication of production | None |
Reserve estimates | No reserves |
Production notes | No production |
Additional commentsSite is in Lake Clark National Park and Preserve. |
MRDS Number | A013030 |
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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 |