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REE systematics and Nd model age of Upper Vendian argillites of the Shkapovo-Shikhan Depression



ISSN 1028-334X, Doklady Earth Sciences, 2006, Vol. 411, No. 8, pp. 1267–1271. © Pleiades Publishing, Inc., 2006. Original Russian Text © A.V. Maslov, Yu.L. Ronkin, M.V. Isherskaya, O.P. Lepikhina, 2006, published in Doklady Akademii Nauk, 2006, Vol. 410, No. 6, pp. 799–803. GEOCHEMISTRY Corresponding Member of the RAS A. V. Maslova, Yu. L. Ronkina, M. V. Isherskaya , and O. P. Lepikhinaa Received March 6, 2006 DOI: 10.1134/S1028334X06080241 The Shakapovo–Shikhan Depression—one of the largest in the eastern part of the East European Platform—is filled with Upper Vendian sedimentary rocks of the Bizhbulyak Complex about 1.6–1.8 km in total thickness. The depression is framed by the Orenburg, Tatar, and Komi–Permyak arches in the southwest, west, and northwest, respectively. These arches are composed of the Archean (~80% of total area of ancient drainage basin [2]) and Paleoproterozoic crystalline rocks. According to the seismostratigraphic data [3], the Upper Vendian sedimentary rocks give way eastward to the coeval Asha Group of the Bashkir Anticlinorium. The transition occurs via a system of fold– thrust dislocations. Different aspects of the formation of the Upper Vendian rocks in the Shkapovo–Shikhan Depression were considered by E.M. Aksenov, M.M. Aliev, M.M. Balashova, Yu.R. Bekker, T.V. Belokon, I.K.



Doklady Earth SciencesSpringer Journals

Published: Nov 1, 2006

DOI: 10.1134/S1028334X06080241

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