Geochemistry of obsidian from Krasnoe Lake on the Chukchi Peninsula (Northeastern Siberia)


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This report considers features of the geochemical composition of obsidian from beach sediments of Krasnoe Lake along the lower course of the Anadyr River, as well as from lava–pyroclastic rocks constituting the lake coastal outcrops and the surrounding branches of Rarytkin Ridge. The two geochemical types of obsidian, for the first time distinguished and researched, correspond in their chemical composition to lavas and ignimbrite-like tuffs of rhyolites from the Rarytkin area. The distinguished types represent the final stage of acidic volcanism in the West Kamchatkan–Koryak volcanic belt. It was assumed that the accumulation of obsidian in coastal pebble beds was caused by the erosion of extrusive domes and pyroclastic flows. The geochemical studies of obsidian artifacts from archeological sites of the regions of the Sea of Okhotsk, the Kolyma River, and the Chukchi Peninsula along with the correlation of geological and archeological samples show that Krasnoe Lake was an important source of “archeological” obsidian in Northeastern Siberia.

作者简介

V. Popov

Far Eastern Geological Institute, Far East Branch

编辑信件的主要联系方式.
Email: vladpov@fegi.ru
俄罗斯联邦, Vladivostok, 690022

A. Grebennikov

Far Eastern Geological Institute, Far East Branch; Far Eastern Federal University

Email: vladpov@fegi.ru
俄罗斯联邦, Vladivostok, 690022; Vladivostok

Ya. Kuzmin

Sobolev Institute of Geology and Mineralogy, Siberian Branch; Tomsk State University

Email: vladpov@fegi.ru
俄罗斯联邦, Novosibirsk, 630090; Tomsk

M. Glascock

University of Missouri Research Reactor

Email: vladpov@fegi.ru
美国, Columbia, Missouri

E. Nozdrachev

Far Eastern Geological Institute, Far East Branch

Email: vladpov@fegi.ru
俄罗斯联邦, Vladivostok, 690022

S. Budnitsky

Far Eastern Geological Institute, Far East Branch

Email: vladpov@fegi.ru
俄罗斯联邦, Vladivostok, 690022

I. Vorobey

Magadan Regional Museum of Local Lore

Email: vladpov@fegi.ru
俄罗斯联邦, Magadan

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