A new helium isotope recored of the Paleocene-Eocene Thermal Maximum from ODP Site 198-1209 (S2)
The Paleocene-Eocene Thermal Maximum (PETM; around 56 Ma ago) is arguably the most intensively studied event of rapid greenhouse warming of the geological past. The duration and age of the PETM, however, remains vividly debated, limiting our understanding of the response of the Earth System dynamics...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.969545 2024-10-13T14:08:59+00:00 A new helium isotope recored of the Paleocene-Eocene Thermal Maximum from ODP Site 198-1209 (S2) Suan, Guillaume Pige, Nicolas Blard, Pierre-Henri Mattioli, Emanuela MEDIAN LATITUDE: 32.651717 * MEDIAN LONGITUDE: 158.505998 * SOUTH-BOUND LATITUDE: 32.651650 * WEST-BOUND LONGITUDE: 158.505930 * NORTH-BOUND LATITUDE: 32.651800 * EAST-BOUND LONGITUDE: 158.506080 * DATE/TIME START: 2001-09-18T00:00:00 * DATE/TIME END: 2001-09-23T04:30:00 * MINIMUM ELEVATION: -2387.4 m * MAXIMUM ELEVATION: -2387.3 m text/tab-separated-values, 2767 data points https://doi.pangaea.de/10.1594/PANGAEA.969545 en eng PANGAEA Bralower, Timothy J; Kelly, Daniel Clay; Gibbs, Samantha J; Farley, Kenneth A; Eccles, Laurie; Lindemann, T Logan; Smith, Gregory J (2014): Impact of dissolution on the sedimentary record of the Paleocene-Eocene thermal maximum. Earth and Planetary Science Letters, 401, 70-82, https://doi.org/10.1016/j.epsl.2014.05.055 https://doi.pangaea.de/10.1594/PANGAEA.969545 CC-BY-4.0: Creative Commons Attribution 4.0 International (License comes into effect after moratorium ends) Access constraints: access rights needed info:eu-repo/semantics/restrictedAccess 198-1209 198-1209B 198-1209C adjusted age-depth model Analytical method COMPCORE Composite Core Date/Time of event Density dry bulk Depth composite revised top DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Elevation of event Event label Fraction non-carbonate Gas age maximum minimum Half Helium Helium-3 extraterrestrial flux instantaneous sedimentation rate Helium-3/non-carbonate fraction ratio IODP Depth Scale Terminology Joides Resolution Latitude of event dataset ftpangaea https://doi.org/10.1016/j.epsl.2014.05.055 2024-09-25T00:03:38Z The Paleocene-Eocene Thermal Maximum (PETM; around 56 Ma ago) is arguably the most intensively studied event of rapid greenhouse warming of the geological past. The duration and age of the PETM, however, remains vividly debated, limiting our understanding of the response of the Earth System dynamics to rapid warming. Here we present new extraterrestrial helium 3 (3HeET) data across the PETM at ODP Site 198-1209 (N Pacific) that document a drop in 3HeET fluxes from 0.56 ± 0.02 pcm³/cm²/ka ~1 Ma prior to the PETM to values of 0.37 ± 0.02 pcm³/cm²/ka before and after the PETM. Our 3HeET-based chronology, optimized through spectral analysis and orbital tuning, indicates a duration of 160±10 ka for the PETM body/core, consistent with previous 3HeET estimates from ODP Site 208-1266 (Walvis Ridge). The PETM started at the onset of a 100 ka eccentricity maxima at 56080 ka BP and ended abruptly during a marked decline in eccentricity at 55883 ka, providing strong support for an orbital trigger of both its onset and termination. The reevaluation of the 3HeET age models of the high paleo-latitude ODP Site 113-690 shows that the prominent sedimentary and carbon isotope steps at this site were controlled by obliquity instead of precession. Our revised chronology suggests that obliquity was also the dominant driver of the repeated drops to lower δ13C values during the PETM in otherwise precession-dominated low latitude sites, possibly reflecting the repeated destabilization of methane hydrate or permafrost carbon stocks at high latitudes. This dataset contains the grayscale reflectance logs obtained on core photographs for ODP Site 198-1209A, B and C, new records of helium isotope and non-carbonate fraction data for ODP Site 198-1209 and the reconstructed apparent 3HeET fluxes (FET), instantaneous sedimentation rates (ISR) and ages. We also report new bulk carbonate carbon and oxygen stable isotope data for ODP Site 198-1209 that are included in a compilation of published bulk carbonate data from the same site along with ... Dataset Methane hydrate permafrost PANGAEA - Data Publisher for Earth & Environmental Science Pacific ENVELOPE(158.505930,158.506080,32.651800,32.651650) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
198-1209 198-1209B 198-1209C adjusted age-depth model Analytical method COMPCORE Composite Core Date/Time of event Density dry bulk Depth composite revised top DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Elevation of event Event label Fraction non-carbonate Gas age maximum minimum Half Helium Helium-3 extraterrestrial flux instantaneous sedimentation rate Helium-3/non-carbonate fraction ratio IODP Depth Scale Terminology Joides Resolution Latitude of event |
spellingShingle |
198-1209 198-1209B 198-1209C adjusted age-depth model Analytical method COMPCORE Composite Core Date/Time of event Density dry bulk Depth composite revised top DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Elevation of event Event label Fraction non-carbonate Gas age maximum minimum Half Helium Helium-3 extraterrestrial flux instantaneous sedimentation rate Helium-3/non-carbonate fraction ratio IODP Depth Scale Terminology Joides Resolution Latitude of event Suan, Guillaume Pige, Nicolas Blard, Pierre-Henri Mattioli, Emanuela A new helium isotope recored of the Paleocene-Eocene Thermal Maximum from ODP Site 198-1209 (S2) |
topic_facet |
198-1209 198-1209B 198-1209C adjusted age-depth model Analytical method COMPCORE Composite Core Date/Time of event Density dry bulk Depth composite revised top DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Elevation of event Event label Fraction non-carbonate Gas age maximum minimum Half Helium Helium-3 extraterrestrial flux instantaneous sedimentation rate Helium-3/non-carbonate fraction ratio IODP Depth Scale Terminology Joides Resolution Latitude of event |
description |
The Paleocene-Eocene Thermal Maximum (PETM; around 56 Ma ago) is arguably the most intensively studied event of rapid greenhouse warming of the geological past. The duration and age of the PETM, however, remains vividly debated, limiting our understanding of the response of the Earth System dynamics to rapid warming. Here we present new extraterrestrial helium 3 (3HeET) data across the PETM at ODP Site 198-1209 (N Pacific) that document a drop in 3HeET fluxes from 0.56 ± 0.02 pcm³/cm²/ka ~1 Ma prior to the PETM to values of 0.37 ± 0.02 pcm³/cm²/ka before and after the PETM. Our 3HeET-based chronology, optimized through spectral analysis and orbital tuning, indicates a duration of 160±10 ka for the PETM body/core, consistent with previous 3HeET estimates from ODP Site 208-1266 (Walvis Ridge). The PETM started at the onset of a 100 ka eccentricity maxima at 56080 ka BP and ended abruptly during a marked decline in eccentricity at 55883 ka, providing strong support for an orbital trigger of both its onset and termination. The reevaluation of the 3HeET age models of the high paleo-latitude ODP Site 113-690 shows that the prominent sedimentary and carbon isotope steps at this site were controlled by obliquity instead of precession. Our revised chronology suggests that obliquity was also the dominant driver of the repeated drops to lower δ13C values during the PETM in otherwise precession-dominated low latitude sites, possibly reflecting the repeated destabilization of methane hydrate or permafrost carbon stocks at high latitudes. This dataset contains the grayscale reflectance logs obtained on core photographs for ODP Site 198-1209A, B and C, new records of helium isotope and non-carbonate fraction data for ODP Site 198-1209 and the reconstructed apparent 3HeET fluxes (FET), instantaneous sedimentation rates (ISR) and ages. We also report new bulk carbonate carbon and oxygen stable isotope data for ODP Site 198-1209 that are included in a compilation of published bulk carbonate data from the same site along with ... |
format |
Dataset |
author |
Suan, Guillaume Pige, Nicolas Blard, Pierre-Henri Mattioli, Emanuela |
author_facet |
Suan, Guillaume Pige, Nicolas Blard, Pierre-Henri Mattioli, Emanuela |
author_sort |
Suan, Guillaume |
title |
A new helium isotope recored of the Paleocene-Eocene Thermal Maximum from ODP Site 198-1209 (S2) |
title_short |
A new helium isotope recored of the Paleocene-Eocene Thermal Maximum from ODP Site 198-1209 (S2) |
title_full |
A new helium isotope recored of the Paleocene-Eocene Thermal Maximum from ODP Site 198-1209 (S2) |
title_fullStr |
A new helium isotope recored of the Paleocene-Eocene Thermal Maximum from ODP Site 198-1209 (S2) |
title_full_unstemmed |
A new helium isotope recored of the Paleocene-Eocene Thermal Maximum from ODP Site 198-1209 (S2) |
title_sort |
new helium isotope recored of the paleocene-eocene thermal maximum from odp site 198-1209 (s2) |
publisher |
PANGAEA |
url |
https://doi.pangaea.de/10.1594/PANGAEA.969545 |
op_coverage |
MEDIAN LATITUDE: 32.651717 * MEDIAN LONGITUDE: 158.505998 * SOUTH-BOUND LATITUDE: 32.651650 * WEST-BOUND LONGITUDE: 158.505930 * NORTH-BOUND LATITUDE: 32.651800 * EAST-BOUND LONGITUDE: 158.506080 * DATE/TIME START: 2001-09-18T00:00:00 * DATE/TIME END: 2001-09-23T04:30:00 * MINIMUM ELEVATION: -2387.4 m * MAXIMUM ELEVATION: -2387.3 m |
long_lat |
ENVELOPE(158.505930,158.506080,32.651800,32.651650) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Methane hydrate permafrost |
genre_facet |
Methane hydrate permafrost |
op_relation |
Bralower, Timothy J; Kelly, Daniel Clay; Gibbs, Samantha J; Farley, Kenneth A; Eccles, Laurie; Lindemann, T Logan; Smith, Gregory J (2014): Impact of dissolution on the sedimentary record of the Paleocene-Eocene thermal maximum. Earth and Planetary Science Letters, 401, 70-82, https://doi.org/10.1016/j.epsl.2014.05.055 https://doi.pangaea.de/10.1594/PANGAEA.969545 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International (License comes into effect after moratorium ends) Access constraints: access rights needed info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2014.05.055 |
_version_ |
1812815782298517504 |