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Late Maastrichtian carbon isotope stratigraphy and cyclostratigraphy of the Newfoundland Margin (Site U1403, IODP Expedition 342)

Batenburg, Sietske J.; Friedrich, Oliver; Moriya, Kazuyoshi; Voigt, Silke; Cournède, Cécile; Möbius, Iris; Blum, Peter; Bornemann, André; Fiebig, Jens; Hasegawa, Takashi; Hull, Pincelli M.; Norris, Richard D.; Röhl, Ursula; Sexton, Philip F.; Westerhold, Thomas; Wilson, Paul A. and IODP Expedition 342 Scientists (2017). Late Maastrichtian carbon isotope stratigraphy and cyclostratigraphy of the Newfoundland Margin (Site U1403, IODP Expedition 342). Newsletters on Stratigraphy (Early Access).

DOI (Digital Object Identifier) Link: https://doi.org/10.1127/nos/2017/0398
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Abstract

Earth’s climate during the Maastrichtian (latest Cretaceous) was punctuated by brief warming and cooling episodes, accompanied by perturbations of the global carbon cycle. Superimposed on a long-term cooling trend, the middle Maastrichtian is characterized by deep-sea warming and relatively high values of stable carbon-isotope ratios, followed by strong climatic variability towards the end of the Cretaceous. A lack of knowledge on the timing of climatic change inhibits our understanding of underlying causal mechanisms. We present an integrated stratigraphy from Integrated Ocean Drilling Program (IODP) Site U1403, providing an expanded deep ocean record from the North Atlantic (Expedition 342, Newfoundland Margin). Distinct sedimentary cyclicity suggests that orbital forcing played a major role in depositional processes, which is confirmed by statistical analyses of high resolution elemental data obtained by X-ray fluorescence (XRF) core scanning. Astronomical calibration reveals that the investigated interval encompasses seven 405-kyr cycles (Ma4051 to Ma4057) and spans the 2.8 Myr directly preceding the Cretaceous/Paleocene (K/Pg) boundary.

Item Type: Journal Item
Copyright Holders: 2017 Gebrüder Borntraeger
ISSN: 0078-0421
Keywords: integrated stratigraphy; paleoclimatology; Maastrichtian; astronomical climate forcing; carbon isotopes; Ocean Drilling Program Site U1403 (Newfoundland)
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Environment, Earth and Ecosystem Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 50858
Depositing User: Philip Sexton
Date Deposited: 11 Sep 2017 08:24
Last Modified: 18 Sep 2017 10:13
URI: http://oro.open.ac.uk/id/eprint/50858
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