Carbon-isotope stratigraphy of the Cenomanian-Turonian carbonate succession of the Türkoğlu section (SE Turkey): implications for the timing of Late Cretaceous sea-level rise and anoxic event

Date

2019-10-18

Author

Mulayim, O
Yılmaz, İsmail Ömer
Sarı, Bilal
Taslı, Kemal

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A carbon–isotope stratigraphy of the upper Cretaceous shallow and deeper water Cretaceous limestones from Türkoğlu section, SE Turkey, has enabled an accurate definition of the Cenomanian–Turonian boundary. Carbon–isotope stratigraphy of this succession revealed a positive shift 13C values that reached +1,97% and represent the CTB interval excursion (OAE2). The sediments close to the boundary show pelagic influence registered by the presence of planktic foraminifera. These results spotlight the potential use of carbon isotopes as a dating and high–resolution correlative tool in shallow–water carbonate rocks and help to elucidate the timing of oceanographic events affected the area that we studied. In particular, it is suggested that the highest rate of a relative, possibly eustatic sea–level rise took place during the latest Cenomanian, that was followed by the global oceanic anoxic event during Cenomanian–Turonian boundary (CTB) interval, and that peak transgression or maximum flooding was achieved during the early Turonian in this region.

Subject Keywords

Carbon-isotope stratigraphy, Sea-level rise, Cenomanian-Turonian boundary (CTB), OAE2

URI

http://kisi.deu.edu.tr/makbulut/IESCA_2019_ABSTRACT_BOOK_FINAL.pdf
https://hdl.handle.net/11511/75924

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Department of Geological Engineering, Conference / Seminar