North Atlantic drift sediments constrain Eocene tidal dissipation and the evolution of the Earth‐Moon system
North Atlantic drift sediments constrain Eocene tidal dissipation and the evolution of the Earth‐Moon system
Cyclostratigraphy and astrochronology are now at the forefront of geologic timekeeping. While this technique heavily relies on the accuracy of astronomical calculations, solar system chaos limits how far back astronomical calculations can be performed with confidence. High-resolution paleoclimate records with Milankovitch imprints now allow reversing the traditional cyclostratigraphic approach: Middle Eocene drift sediments from Newfoundland Ridge are well-suited for this purpose, due to high sedimentation rates and distinct lithological cycles. Per contra, the stratigraphies of Integrated Ocean Drilling Program Sites U1408–U1410 are highly complex with several hiatuses. Here, we built a two-site composite and constructed a conservative age-depth model to provide a reliable chronology for this rhythmic, highly resolved (<1 kyr) sedimentary archive. Astronomical components (g-terms and precession constant) are extracted from proxy time-series using two different techniques, producing consistent results. We find astronomical frequencies up to 4% lower than reported in astronomical solution La04. This solution, however, was smoothed over 20-Myr intervals, and our results therefore provide constraints on g-term variability on shorter, million-year timescales. We also report first evidence that the g
4–g
3 “grand eccentricity cycle” may have had a 1.2-Myr period around 41 Ma, contrary to its 2.4-Myr periodicity today. Our median precession constant estimate (51.28 ± 0.56″/year) confirms earlier indicators of a relatively low rate of tidal dissipation in the Paleogene. Newfoundland Ridge drift sediments thus enable a reliable reconstruction of astronomical components at the limit of validity of current astronomical calculations, extracted from geologic data, providing a new target for the next generation of astronomical calculations.
De Vleeschouwer, David
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Penman, Donald E.
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D'haenens, Simon
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Wu, Fei
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Westerhold, Thomas
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Vahlenkamp, Maximilian
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Cappelli, Carlotta
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Agnini, Claudia
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Kordesch, Wendy E.C.
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King, Daniel J.
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Van Der Ploeg, Robin
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Palike, Heiko
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Kirtland Turner, Sandra
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Wilson, Paul
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Norris, Richard D.
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Zachos, James C.
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Bohaty, Steven
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Hull, Pincelli M.
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9 February 2023
De Vleeschouwer, David
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Penman, Donald E.
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D'haenens, Simon
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Wu, Fei
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Westerhold, Thomas
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Vahlenkamp, Maximilian
9039e6ad-44e9-402c-98ac-ff81b22b07f6
Cappelli, Carlotta
97c45d21-56c9-42e9-951a-3ccb8698707c
Agnini, Claudia
dd107c35-47ba-4140-a232-637ca2c041cd
Kordesch, Wendy E.C.
68780b6a-f991-4723-a388-062df6bff5cd
King, Daniel J.
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Van Der Ploeg, Robin
f17951c6-b5eb-479b-95a7-e04714635bb3
Palike, Heiko
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Kirtland Turner, Sandra
a6e8275b-cd0d-4a51-8e4f-7044ff7b0bcb
Wilson, Paul
f940a9f0-fa5a-4a64-9061-f0794bfbf7c6
Norris, Richard D.
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Zachos, James C.
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Bohaty, Steven
af9dbe78-8b9f-44f2-ba1d-20795837d2d1
Hull, Pincelli M.
071e549a-6172-448b-b339-9359c495c03c
De Vleeschouwer, David, Penman, Donald E., D'haenens, Simon, Wu, Fei, Westerhold, Thomas, Vahlenkamp, Maximilian, Cappelli, Carlotta, Agnini, Claudia, Kordesch, Wendy E.C., King, Daniel J., Van Der Ploeg, Robin, Palike, Heiko, Kirtland Turner, Sandra, Wilson, Paul, Norris, Richard D., Zachos, James C., Bohaty, Steven and Hull, Pincelli M.
(2023)
North Atlantic drift sediments constrain Eocene tidal dissipation and the evolution of the Earth‐Moon system.
Paleoceanography and Paleoclimatology, 38 (2), [e2022PA004555].
(doi:10.1029/2022PA004555).
Abstract
Cyclostratigraphy and astrochronology are now at the forefront of geologic timekeeping. While this technique heavily relies on the accuracy of astronomical calculations, solar system chaos limits how far back astronomical calculations can be performed with confidence. High-resolution paleoclimate records with Milankovitch imprints now allow reversing the traditional cyclostratigraphic approach: Middle Eocene drift sediments from Newfoundland Ridge are well-suited for this purpose, due to high sedimentation rates and distinct lithological cycles. Per contra, the stratigraphies of Integrated Ocean Drilling Program Sites U1408–U1410 are highly complex with several hiatuses. Here, we built a two-site composite and constructed a conservative age-depth model to provide a reliable chronology for this rhythmic, highly resolved (<1 kyr) sedimentary archive. Astronomical components (g-terms and precession constant) are extracted from proxy time-series using two different techniques, producing consistent results. We find astronomical frequencies up to 4% lower than reported in astronomical solution La04. This solution, however, was smoothed over 20-Myr intervals, and our results therefore provide constraints on g-term variability on shorter, million-year timescales. We also report first evidence that the g
4–g
3 “grand eccentricity cycle” may have had a 1.2-Myr period around 41 Ma, contrary to its 2.4-Myr periodicity today. Our median precession constant estimate (51.28 ± 0.56″/year) confirms earlier indicators of a relatively low rate of tidal dissipation in the Paleogene. Newfoundland Ridge drift sediments thus enable a reliable reconstruction of astronomical components at the limit of validity of current astronomical calculations, extracted from geologic data, providing a new target for the next generation of astronomical calculations.
Text
Paleoceanog and Paleoclimatol - 2023 - De Vleeschouwer - North Atlantic Drift Sediments Constrain Eocene Tidal Dissipation (1)
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Accepted/In Press date: 11 January 2023
e-pub ahead of print date: 9 February 2023
Published date: 9 February 2023
Additional Information:
Funding Information:
This research used samples and data provided by the International Ocean Discovery Program (IODP) and its predecessors, a program sponsored by NSF and participating countries under the management of Joint Oceanographic Institutions. XRF core-scanning was made possible thanks to the instrumentation and support of the SIO Geological Collections at the Scripps Institution of Oceanography, University of California San Diego (managed by A. Hangsterfer). We warmly thank all shipboard and on-shore scientists that contributed to XRF core scanning in Bremen and San Diego. Financial support was provided by the National Science Foundation (NSF) to PMH (NSF Award #1335261) and JCZ (NSF Award #1334209) and the Belgian American Educational Foundation (B.A.E.F.) and the Fulbright Commission of Belgium and Luxemburg to SD. B. Erkkila, M. Wint, L. Elder and numerous students of the Yale Analytical and Stable Isotope Center, D. Andreasen of the UCSC Stable Isotope Laboratory, Megan Wilding and Bastian Hambach of the NOCS stable isotope lab, and Henning Kuhnert and the team of the MARUM isotope lab are thanked for assistance with isotopic analyses. All Bayesian Morkov Chain Monte Carlo analyses were run on the PALMA-II High Performance Computing cluster provided by the University of Münster. Open Access funding enabled and organized by Projekt DEAL.
Funding Information:
This research used samples and data provided by the International Ocean Discovery Program (IODP) and its predecessors, a program sponsored by NSF and participating countries under the management of Joint Oceanographic Institutions. XRF core‐scanning was made possible thanks to the instrumentation and support of the SIO Geological Collections at the Scripps Institution of Oceanography, University of California San Diego (managed by A. Hangsterfer). We warmly thank all shipboard and on‐shore scientists that contributed to XRF core scanning in Bremen and San Diego. Financial support was provided by the National Science Foundation (NSF) to PMH (NSF Award #1335261) and JCZ (NSF Award #1334209) and the Belgian American Educational Foundation (B.A.E.F.) and the Fulbright Commission of Belgium and Luxemburg to SD. B. Erkkila, M. Wint, L. Elder and numerous students of the Yale Analytical and Stable Isotope Center, D. Andreasen of the UCSC Stable Isotope Laboratory, Megan Wilding and Bastian Hambach of the NOCS stable isotope lab, and Henning Kuhnert and the team of the MARUM isotope lab are thanked for assistance with isotopic analyses. All Bayesian Morkov Chain Monte Carlo analyses were run on the PALMA‐II High Performance Computing cluster provided by the University of Münster. Open Access funding enabled and organized by Projekt DEAL.
Publisher Copyright:
© 2023. The Authors.
Identifiers
Local EPrints ID: 477105
URI: http://eprints.soton.ac.uk/id/eprint/477105
ISSN: 2572-4525
PURE UUID: c29882fe-a603-4066-ad02-519d30951293
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Date deposited: 26 May 2023 16:39
Last modified: 16 Apr 2024 01:40
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Contributors
Author:
David De Vleeschouwer
Author:
Donald E. Penman
Author:
Simon D'haenens
Author:
Fei Wu
Author:
Thomas Westerhold
Author:
Maximilian Vahlenkamp
Author:
Carlotta Cappelli
Author:
Claudia Agnini
Author:
Wendy E.C. Kordesch
Author:
Daniel J. King
Author:
Robin Van Der Ploeg
Author:
Heiko Palike
Author:
Sandra Kirtland Turner
Author:
Richard D. Norris
Author:
James C. Zachos
Author:
Pincelli M. Hull
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