DBPapers
DOI: 10.5593/SGEM2014/B11/S1.048

THE VISEAN - SERPUKHOVIAN BOUNDARY DEPOSITS AND FORAMINIFERA’S IN SECTION AKTOBE IN BIG KARATAU (SOUTH KAZAKHSTAN)

A. B. Baybatsha, S. N. Mustapayeva, V.Ja Zhaimina, Z. Belka
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-07-0 / ISSN 1314-2704, June 19-25, 2014, Book 1, Vol. 1, 361-366 pp

ABSTRACT
M. Marfenkova was the first scientist who recognizes foraminiferal zones in the Big Karatau Mountains in 1991. Paleontologist V. Zhaimina recognized foraminiferal zones in the same region in 2006. Those researches were continued by S.N. Mustapaeva, V. Zhaimina, A. Baybatsha and J. Belka in 2012. In the Aktobe section, the lower part of the Upper Viséan interval composed of alternating wackestone, packstone and grainstone beds (Baktysay Formation) contain debris flow breccia with corals and brachiopods. Wackestones contain conodonts. The middle part of this interval contains an algal buildup with brachiopods (boundstone). This is part of the Akuyuk reef complex. The Upper Serpukhovian interval is composed of packstone-grainstone alternating with wackestones and containing a breccia bed. The section is capped by the Akuyuk reef complex composed of algal-bryozoan boundstone with foraminifers, brachiopods and corals. Both shallow and deep-water facies contain assemblages of Upper Viséan and Lower Serpukhovian foraminifers. The base of the Serpukhovian is currently drawn at the level of the first appearance of Janischewskina delicate. The research group found new results on foraminifers Janischewskina delicata in Aktobe section in the Big Karatau Mountains. Local correlation of deep and shallow carbonate facies is based on species of Neoarchaediscus and Janischewskina.

Keywords:Janischewskina delicata, serpukhovian, visean, Big Karatau, Aktobe section.

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