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Late Permian (Tatarian) fluvio-lacustrine successions in NW Anatolia (Zonguldak Terrane, Turkey): palaeogeographic implications

Published online by Cambridge University Press:  25 July 2016

CENGİZ OKUYUCU ,
TATYANA K. DIMITROVA ,
MEHMET CEMAL GÖNCÜOĞLU  and
İBRAHİM GEDİK
CENGİZ OKUYUCU*
Affiliation:
Department of Geological Engineering, Selçuk University, 42250 Selçuklu, Konya, Turkey
TATYANA K. DIMITROVA
Affiliation:
Bulgarian Academy of Sciences, Institute of Geology, 1113 Sofia, Bulgaria
MEHMET CEMAL GÖNCÜOĞLU
Affiliation:
Department of Geological Engineering, Middle East Technical University, 06800 Çankaya, Ankara, Turkey
İBRAHİM GEDİK
Affiliation:
General Directorate of Mineral Research and Exploration (MTA), Department of Geological Research, 06800 Çankaya, Ankara, Turkey
*
†Author for correspondence: [email protected]
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Abstract

Late Permian fluvio-lacustrine successions of the Çakraz Formation in the Zonguldak Terrane between the regions of Akçakoca and Ereğli were investigated in order to describe the litho- and biostratigraphic properties and explain the depositional environment. The studied succession with black, dark-grey to greenish-grey shales, siltstones and limestones is named the Alaplı Member to distinguish it from the classical red clastic successions, which are tentatively named the Ereğli Member of the Çakraz Formation. The organic-rich black shales, mudstones and limestones of the Alaplı Member yielded palynological assemblages suggesting a Lopingian (Tatarian) age. The lack of any marine macro- or microfossils, the fine-grained character of the lithofacies with abundant plant material and the association of poorly sorted conglomerates in the middle part of the succession indicate possible deposition in a broad range of fluvial and lacustrine environments. Successions of similar age and depositional environment are known from the East European Variscan Belt in Bulgaria and Romania. Common successions were also developed in actively extending shallow-marine platforms on the NW Palaeotethyan margin at the end of the Permian Period.

Keywords

PermianLopingianTatarianpollenZonguldak TerraneTurkey
Type
Original Articles
Information
Geological Magazine , Volume 154 , Issue 5 , September 2017 , pp. 1073 - 1087
Copyright
Copyright © Cambridge University Press 2016 

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