Late Cenomanian to Middle Turonian high-resolution carbon isotope stratigraphy: new data from the Münsterland Cretaceous Basin, Germany.

Voigt, Silke, Aurag, A., Leis, F. and Kaplan, U. (2007) Late Cenomanian to Middle Turonian high-resolution carbon isotope stratigraphy: new data from the Münsterland Cretaceous Basin, Germany. Earth and Planetary Science Letters, 253 . pp. 196-210. DOI 10.1016/j.epsl.2006.10.026.

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Abstract

New high resolution carbon isotope stratigraphies from two basinal pelagic carbonate successions in northern Germany (Halle and Oerlinghausen, Münsterland Cretaceous Basin) resolve late Cenomanian to early Mid-Turonian carbon cycle variations at timescales of less than 100 kyr. Beside the major carbon isotope excursion of the late Cenomanian oceanic anoxic event (OAE 2), 11 small-scale distinct features are precisely resolved in the δ13C carbonate curve and related to boreal macrofossil zonations. The small-scale carbon isotope events correspond to secular δ13C carbonate variations identified previously in the English Chalk. The boreal high-resolution δ13C carbonate curve shows a detailed coincidence with two Tethyan δ13C curves from Italy, what demonstrates the interregional significance of the δ13C dates and allows their correlation within error limits of ± 40 kyr. Furthermore, the new δ13C curve enables the calibration of boreal and tethyan macro- and microfossil zonations. Accordingly, the Tethyan calcareous nannoplankton boundary NC13/NC14 corresponds to the boreal FO of C. woollgari, the index taxon for the Lower-Middle Turonian boundary. The cyclic appearance and the temporal spacing of the small-scale carbon isotope events suggest that orbital forcing exerted control on surface water productivity and organic matter preservation at the sea floor.

Document Type: Article
Keywords: carbon isotope stratigraphy, Cretaceous, correlation
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.epsl.2006.10.026
ISSN: 0012-821X
Date Deposited: 28 Apr 2009 14:36
Last Modified: 30 Jan 2017 14:04
URI: http://oceanrep.geomar.de/id/eprint/3221

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