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

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

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. A high-resolution carbon-isotope record from bulk carbonates allows us to identify global trends in the late Maastrichtian carbon cycle. Low-amplitude variations (up to 0.4‰) in carbon isotopes at Site U1403 match similar scale variability in records from Tethyan and Pacific open-ocean sites. Comparison between Site U1403 and the hemipelagic restricted basin of the Zumaia section (northern Spain), with its own well-established independent cyclostratigraphic framework, is more complex. Whereas the pre-K/Pg oscillations and the negative values of the Mid-Maastrichtian Event (MME) can be readily discerned in both the Zumaia and U1403 records, patterns diverge during a ~ 1 Myr period in the late Maastrichtian (67.8-66.8 Ma), with Site U1403 more reliably reflecting global carbon cycling. Our new carbon isotope record and cyclostratigraphy offer promise for Site U1403 to serve as a future reference section for high-resolution studies of late Maastrichtian paleoclimatic change.

Astronomical climate forcing, Carbon isotopes, Integrated stratigraphy, Maastrichtian, Ocean Drilling Program Site U1403 (Newfoundland), Paleoclimatology
0078-0421
245-260
Batenburg, Sietske J.
5f05bc69-6654-4673-8279-30e5ae762726
Friedrich, Oliver
30dc21d4-6581-4b89-96b1-c11689e85078
Moriya, Kazuyoshi
d6b84bd5-a826-4cf9-8db3-5c65c4f1e93b
Voigt, Silke
5a9a2192-017e-44f8-ac46-ef545a3b5237
Cournède, Cécile
07506843-37e4-471f-80d6-31c8e162bba9
Moebius, Iris
fd82d7cc-0a1b-4046-8fd5-9e0d5b4f739e
Blum, Peter
638fafe6-f3d5-4103-9c08-59e7342a022c
Bornemann, André
57f1da93-2b5f-4f6d-a0b6-2ce8cd918d89
Fiebig, Jens
2002fcc6-8c97-4f72-9f07-76efa9bd89ee
Hasegawa, Takashi
a0a6e7e7-af35-402e-ac4f-848e9e5c62f0
Hull, Pincelli M.
56b9ec5b-7112-453b-92fd-b4b84cfcc326
Norris, Richard D.
9e0dfa1e-0c69-4666-bbf9-a5a14909d8f9
Röhl, Ursula
c28c498d-f0a1-4c25-bf94-4bf46641ceed
Sexton, Philip F.
e461e50e-fb4e-4d13-9013-5155be9f90ce
Westerhold, Thomas
7b499943-ba7a-40e8-ae35-797594908d30
Wilson, Paul A.
f940a9f0-fa5a-4a64-9061-f0794bfbf7c6
the IODP Expedition 342 Scientists
Batenburg, Sietske J.
5f05bc69-6654-4673-8279-30e5ae762726
Friedrich, Oliver
30dc21d4-6581-4b89-96b1-c11689e85078
Moriya, Kazuyoshi
d6b84bd5-a826-4cf9-8db3-5c65c4f1e93b
Voigt, Silke
5a9a2192-017e-44f8-ac46-ef545a3b5237
Cournède, Cécile
07506843-37e4-471f-80d6-31c8e162bba9
Moebius, Iris
fd82d7cc-0a1b-4046-8fd5-9e0d5b4f739e
Blum, Peter
638fafe6-f3d5-4103-9c08-59e7342a022c
Bornemann, André
57f1da93-2b5f-4f6d-a0b6-2ce8cd918d89
Fiebig, Jens
2002fcc6-8c97-4f72-9f07-76efa9bd89ee
Hasegawa, Takashi
a0a6e7e7-af35-402e-ac4f-848e9e5c62f0
Hull, Pincelli M.
56b9ec5b-7112-453b-92fd-b4b84cfcc326
Norris, Richard D.
9e0dfa1e-0c69-4666-bbf9-a5a14909d8f9
Röhl, Ursula
c28c498d-f0a1-4c25-bf94-4bf46641ceed
Sexton, Philip F.
e461e50e-fb4e-4d13-9013-5155be9f90ce
Westerhold, Thomas
7b499943-ba7a-40e8-ae35-797594908d30
Wilson, Paul A.
f940a9f0-fa5a-4a64-9061-f0794bfbf7c6

Batenburg, Sietske J., Friedrich, Oliver, Moriya, Kazuyoshi, Voigt, Silke, Cournède, Cécile, Moebius, Iris, Blum, Peter, Bornemann, André, Fiebig, Jens, Hasegawa, Takashi, Hull, Pincelli M., Norris, Richard D., Röhl, Ursula, Sexton, Philip F., Westerhold, Thomas and Wilson, Paul A. , the IODP Expedition 342 Scientists (2018) Late Maastrichtian carbon isotope stratigraphy and cyclostratigraphy of the Newfoundland Margin (Site U1403, IODP Leg 342). Newsletters on Stratigraphy, 51 (2), 245-260. (doi:10.1127/nos/2017/0398).

Record type: Article

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. A high-resolution carbon-isotope record from bulk carbonates allows us to identify global trends in the late Maastrichtian carbon cycle. Low-amplitude variations (up to 0.4‰) in carbon isotopes at Site U1403 match similar scale variability in records from Tethyan and Pacific open-ocean sites. Comparison between Site U1403 and the hemipelagic restricted basin of the Zumaia section (northern Spain), with its own well-established independent cyclostratigraphic framework, is more complex. Whereas the pre-K/Pg oscillations and the negative values of the Mid-Maastrichtian Event (MME) can be readily discerned in both the Zumaia and U1403 records, patterns diverge during a ~ 1 Myr period in the late Maastrichtian (67.8-66.8 Ma), with Site U1403 more reliably reflecting global carbon cycling. Our new carbon isotope record and cyclostratigraphy offer promise for Site U1403 to serve as a future reference section for high-resolution studies of late Maastrichtian paleoclimatic change.

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e-pub ahead of print date: 14 August 2017
Published date: 1 March 2018
Keywords: Astronomical climate forcing, Carbon isotopes, Integrated stratigraphy, Maastrichtian, Ocean Drilling Program Site U1403 (Newfoundland), Paleoclimatology

Identifiers

Local EPrints ID: 418428
URI: https://eprints.soton.ac.uk/id/eprint/418428
ISSN: 0078-0421
PURE UUID: dda9d64f-38c2-41fb-b1f3-4021c36592b6

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Date deposited: 08 Mar 2018 17:30
Last modified: 25 May 2018 16:30

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Contributors

Author: Sietske J. Batenburg
Author: Oliver Friedrich
Author: Kazuyoshi Moriya
Author: Silke Voigt
Author: Cécile Cournède
Author: Iris Moebius
Author: Peter Blum
Author: André Bornemann
Author: Jens Fiebig
Author: Takashi Hasegawa
Author: Pincelli M. Hull
Author: Richard D. Norris
Author: Ursula Röhl
Author: Philip F. Sexton
Author: Thomas Westerhold
Author: Paul A. Wilson

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