Middle Eocene astronomically-tuned benthic stable isotopes, bulk stable isotopes and Ca/Fe-ratios of IODP Expedition 342 Sites U1408 and U1410
To come to a coherent middle Eocene timescale for the Atlantic, we re-evaluate the astrochronology of chrons C20n/C20r at International Ocean Discovery Program (IODP) Expedition 342 Sites U1408 and U1410 off Newfoundland. Based on the stratigraphic work of Cappelli et al., 2019 a two-site-composite...
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.928159 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.928159 2023-05-15T17:21:51+02:00 Middle Eocene astronomically-tuned benthic stable isotopes, bulk stable isotopes and Ca/Fe-ratios of IODP Expedition 342 Sites U1408 and U1410 Vahlenkamp, Maximilian D'haenens, Simon De Vleeschouwer, David Hull, Pincelli M Zachos, James C Agnini, Claudia Pälike, Heiko MEDIAN LATITUDE: 31.403721 * MEDIAN LONGITUDE: -42.059914 * SOUTH-BOUND LATITUDE: -28.532830 * WEST-BOUND LONGITUDE: -49.785805 * NORTH-BOUND LATITUDE: 41.438315 * EAST-BOUND LONGITUDE: 2.779480 * DATE/TIME START: 2003-03-29T15:15:00 * DATE/TIME END: 2003-04-03T13:30:00 2021-02-18 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.928159 en eng PANGAEA Vahlenkamp, Maximilian; D'haenens, Simon; De Vleeschouwer, David; Hull, Pincelli M; Zachos, James C; Agnini, Claudia; Cappelli, Carlotta; Pälike, Heiko (in prep.): Middle Eocene astronomically-tuned benthic stable isotopes, bulk stable isotopes and Ca/Fe-ratios of IODP Expedition 342 Sites U1408 and U1410. https://doi.pangaea.de/10.1594/PANGAEA.928159 Access constraints: access rights needed info:eu-repo/semantics/restrictedAccess Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Ocean Drilling Program ODP Dataset 2021 ftpangaea 2023-01-20T07:34:42Z To come to a coherent middle Eocene timescale for the Atlantic, we re-evaluate the astrochronology of chrons C20n/C20r at International Ocean Discovery Program (IODP) Expedition 342 Sites U1408 and U1410 off Newfoundland. Based on the stratigraphic work of Cappelli et al., 2019 a two-site-composite for the chrons C20n and C20r (~42-46 Ma) was constructed by transferring U1410 samples to the U1408 depth-scale. We then used previously published (U1410; Vahlenkamp et al., 2018) and new (U1408) benthic and bulk stable isotopes (d^13^C and d^18^O) to derive a revised eccentricity-tuned astrochronology for the Expedition 342 composite. The astrochronologic tuning demonstrates that the contourite deposition (reflected by the Ca/Fe ratio) at the Newfoundland Ridge occurred under an amplified climatic response to obliquity during C20n and C20r – with intermittent “astronomical flickering” to precession. To further test our astrochronology we refined nannofossil datums at Site 1263 to compare with those at Site U1410 (Cappelli et al., 2019). The new chronology synchronizes time scales across the Atlantic basin. A robust middle Eocene chronology for the North Atlantic is indispensable because Expedition 342 sites host the highest-resolution middle Eocene benthic stable isotope records for this time interval. Dataset Newfoundland North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-49.785805,2.779480,41.438315,-28.532830) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Ocean Drilling Program ODP |
spellingShingle |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Ocean Drilling Program ODP Vahlenkamp, Maximilian D'haenens, Simon De Vleeschouwer, David Hull, Pincelli M Zachos, James C Agnini, Claudia Pälike, Heiko Middle Eocene astronomically-tuned benthic stable isotopes, bulk stable isotopes and Ca/Fe-ratios of IODP Expedition 342 Sites U1408 and U1410 |
topic_facet |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Ocean Drilling Program ODP |
description |
To come to a coherent middle Eocene timescale for the Atlantic, we re-evaluate the astrochronology of chrons C20n/C20r at International Ocean Discovery Program (IODP) Expedition 342 Sites U1408 and U1410 off Newfoundland. Based on the stratigraphic work of Cappelli et al., 2019 a two-site-composite for the chrons C20n and C20r (~42-46 Ma) was constructed by transferring U1410 samples to the U1408 depth-scale. We then used previously published (U1410; Vahlenkamp et al., 2018) and new (U1408) benthic and bulk stable isotopes (d^13^C and d^18^O) to derive a revised eccentricity-tuned astrochronology for the Expedition 342 composite. The astrochronologic tuning demonstrates that the contourite deposition (reflected by the Ca/Fe ratio) at the Newfoundland Ridge occurred under an amplified climatic response to obliquity during C20n and C20r – with intermittent “astronomical flickering” to precession. To further test our astrochronology we refined nannofossil datums at Site 1263 to compare with those at Site U1410 (Cappelli et al., 2019). The new chronology synchronizes time scales across the Atlantic basin. A robust middle Eocene chronology for the North Atlantic is indispensable because Expedition 342 sites host the highest-resolution middle Eocene benthic stable isotope records for this time interval. |
format |
Dataset |
author |
Vahlenkamp, Maximilian D'haenens, Simon De Vleeschouwer, David Hull, Pincelli M Zachos, James C Agnini, Claudia Pälike, Heiko |
author_facet |
Vahlenkamp, Maximilian D'haenens, Simon De Vleeschouwer, David Hull, Pincelli M Zachos, James C Agnini, Claudia Pälike, Heiko |
author_sort |
Vahlenkamp, Maximilian |
title |
Middle Eocene astronomically-tuned benthic stable isotopes, bulk stable isotopes and Ca/Fe-ratios of IODP Expedition 342 Sites U1408 and U1410 |
title_short |
Middle Eocene astronomically-tuned benthic stable isotopes, bulk stable isotopes and Ca/Fe-ratios of IODP Expedition 342 Sites U1408 and U1410 |
title_full |
Middle Eocene astronomically-tuned benthic stable isotopes, bulk stable isotopes and Ca/Fe-ratios of IODP Expedition 342 Sites U1408 and U1410 |
title_fullStr |
Middle Eocene astronomically-tuned benthic stable isotopes, bulk stable isotopes and Ca/Fe-ratios of IODP Expedition 342 Sites U1408 and U1410 |
title_full_unstemmed |
Middle Eocene astronomically-tuned benthic stable isotopes, bulk stable isotopes and Ca/Fe-ratios of IODP Expedition 342 Sites U1408 and U1410 |
title_sort |
middle eocene astronomically-tuned benthic stable isotopes, bulk stable isotopes and ca/fe-ratios of iodp expedition 342 sites u1408 and u1410 |
publisher |
PANGAEA |
publishDate |
2021 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.928159 |
op_coverage |
MEDIAN LATITUDE: 31.403721 * MEDIAN LONGITUDE: -42.059914 * SOUTH-BOUND LATITUDE: -28.532830 * WEST-BOUND LONGITUDE: -49.785805 * NORTH-BOUND LATITUDE: 41.438315 * EAST-BOUND LONGITUDE: 2.779480 * DATE/TIME START: 2003-03-29T15:15:00 * DATE/TIME END: 2003-04-03T13:30:00 |
long_lat |
ENVELOPE(-49.785805,2.779480,41.438315,-28.532830) |
genre |
Newfoundland North Atlantic |
genre_facet |
Newfoundland North Atlantic |
op_relation |
Vahlenkamp, Maximilian; D'haenens, Simon; De Vleeschouwer, David; Hull, Pincelli M; Zachos, James C; Agnini, Claudia; Cappelli, Carlotta; Pälike, Heiko (in prep.): Middle Eocene astronomically-tuned benthic stable isotopes, bulk stable isotopes and Ca/Fe-ratios of IODP Expedition 342 Sites U1408 and U1410. https://doi.pangaea.de/10.1594/PANGAEA.928159 |
op_rights |
Access constraints: access rights needed info:eu-repo/semantics/restrictedAccess |
_version_ |
1766107703736795136 |