|Quadrangle map, 1:250,000-scale||LC|
|Quadrangle map, 1:63,360-scale||B-8|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||About 6.8 km west-northwest of VABM Overlook, where generally northward flowing tributaries enter the Mulchatna River. Sec. 32, T. 4 N., R. 38 W., of the Seward Meridian. Locality accurate within 1.6 km.|
Only information is that 162 placer gold claims were staked here near the Mulchatna River (U.S. Bureau of Mines, 1973).The most abundant bedrock in the areas upstream of the claims is a Jurassic to Cretaceous flysch sequence (Nelson and others, 1983; unit KJs). Unit KJs is described as interbedded lithic graywacke, silty sandstone, black shale, and local conglomerate. Irregular quartz segregations and veinlets are locally present. Scattered stocks and locally abundant dikes of intermediate to felsic composition intrude these sedimentary rocks. Adjacent to some of the larger igneous bodies are narrow contact aureoles of pelitic hornfels. Unit KJs is intruded (locally) by various Cretaceous to Tertiary plutons. The plutons include quartz monzonite, monzodiorite, grano-diorite, diorite, and rhyolite dikes. Also present is Unit Tv of Nelson and others (1983) which includes rhyolitic breccia, ash-flow tuff, flows, and intrusive rocks and subordinate mafic to intermediate flows. 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||(-155.902235301747, 60.3893051243786)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Alteration of deposit||Not applicable|
|Workings or exploration||Unknown|
|Indication of production||Undetermined|
|Reserve estimates||No reserves.|
|Production notes||No production.|
Additional commentsCobb and Reed (1981) mention gold in most river bars of the Mulchatna River, with most prospecting occurring around the late 1890s or early 1900s.
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.
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.
U.S. Bureau of Mines, 1973, Alaska 1:250,000-scale quadrangle map overlays showing mineral deposit locations, principal minerals, and number and type of claims: U.S. Bureau of Mines Open-File Report 20-73, 95 overlays (updated in 1986, 1987).
|Reporters||D.P. Bickerstaff (USGS)|
|Last report date||6/15/1998|