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| Titel |
Orbital calibration of the late Campanian carbon isotope event in the North Sea |
| VerfasserIn |
Anastasios Perdiou, Nicolas Thibault, Kresten Anderskouv, Frans van Buchem, Govert Joan Arie Buijs, Christian J. Bjerrum |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250121543
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| Publikation (Nr.) |
 EGU/EGU2016-312.pdf |
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| Zusammenfassung |
| A new record of carbon isotopes, nannofossil biostratigraphy, gamma-ray and Fe content variations is presented for the upper Campanian of the Adda-3 core, Danish Central Graben, North Sea. The studied interval provides a revision of previously assigned late Coniacian to early Santonian ages. New biostratigraphic data show a late Campanian age for the 60-m thick studied interval. The Late Campanian Event (LCE) is well-recorded by a 1.5‰ negative excursion in the bulk δ13C, along with two stepwise pre-excursion negative shifts (defining the pre-LCE). The amplitude of the LCE appears higher in the North Sea than in other areas as seen from the correlation to Germany, UK, and France. This correlation allows identification of a new 0.4‰ negative excursion (defined as the conica event). Fe and gamma-ray variations are used to calibrate the record with cyclostratigraphy. Fourteen 405 kyr cycles identified in the upper Campanian of Adda-3 can be correlated to North Germany. The compilation of previous results from North Germany and correlation to Adda-3 indicates that the Boreal upper Campanian spans a total of seventeen 405 cycles, i.e. 6.885 Myr. The duration of the LCE is estimated to be of ca. 1 Myr at Adda-3 and in North Germany. |
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