Late Cenomanian to Middle Turonian high-resolution carbon isotope stratigraphy: New data from the Münsterland Cretaceous Basin,Germany |
| |
| Institution: | 1. Institute of Geology and Mineralogy, University of Cologne, Zülpicher Str. 49a, 50674, Köln, Germany;2. Eichenallee 141, 33332 Gütersloh, Germany;1. Institut für Geochemie und Petrologie, ETH Zürich, Clausiusstrasse 25, 8092, Zürich, Switzerland;2. School of Earth Sciences, University of Bristol, Wills Memorial Building, BS8 1RJ, Bristol, UK;3. Department of Earth Sciences, University of Oxford, South Parks Road, OX1 3AN, Oxford, UK;1. Department of Earth Sciences, University of Oxford, South Parks Road, Oxford OX1 3AN, UK;2. School of Earth and Environmental Sciences, University of Portsmouth, Burnaby Road, Oxford PO1 3QL, UK;3. Department of Earth Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, UK;1. Department of Earth Sciences, Durham University, Durham DH1 3LE, UK;2. Department of Geological Sciences, Northwestern University, Evanston, IL 60208, USA;3. School of Geography, Geology and the Environment, Kingston University London, Kingston upon Thames KT1 2EE, UK;4. Institute of Geosciences, Goethe-University Frankfurt, Altenhöferallee 1, 60438 Frankfurt, Germany;1. SPEEDSTAT, 19 Langstrom Crescent, Ottawa, ON K1G 5J5, Canada;2. Department of Earth Sciences, Carleton University, Ottawa, ON K1S 5B6, Canada;3. KFUPM, Box 209, Dhahran 31261, Saudi Arabia;4. International Arctic Science Committee (IASC), Telegrafenberg A43, 14473 Potsdam, Germany;3. Geology Department, Faculty of Science, Benha University, Benha, Egypt;4. Senckenberg Naturhistorische Sammlungen Dresden, Museum für Mineralogie und Geologie, Sektion Paläozoologie, Königsbrücker Landstr. 159, D-01109 Dresden, Germany |
| |
| 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. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
