(Table 1) Helium isotope ratio of ODP Site 198-1209 sediments
We attempt to constrain the variability of the flux of extraterrestrial 3He in the Paleocene by studying sediments from Shatsky Rise (Ocean Drilling Program, ODP Leg 198) that have tight orbital age control. 3He concentrations in Shatsky Rise sediments vary periodically at high frequency by about a...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.786024 2023-05-15T18:43:19+02:00 (Table 1) Helium isotope ratio of ODP Site 198-1209 sediments Marcantonio, Franco Thomas, Deborah J Woodard, Stella C McGee, David Winckler, Gisela LATITUDE: 32.651700 * LONGITUDE: 158.505983 * DATE/TIME START: 2001-09-18T00:00:00 * DATE/TIME END: 2001-09-23T00:00:00 * MINIMUM DEPTH, sediment/rock: 229.93 m * MAXIMUM DEPTH, sediment/rock: 233.99 m 2009-07-13 text/tab-separated-values, 192 data points https://doi.pangaea.de/10.1594/PANGAEA.786024 https://doi.org/10.1594/PANGAEA.786024 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.786024 https://doi.org/10.1594/PANGAEA.786024 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Marcantonio, Franco; Thomas, Deborah J; Woodard, Stella C; McGee, David; Winckler, Gisela (2009): Extraterrestrial 3He in Paleocene sediments from Shatsky Rise: Constraints on sedimentation rate variability. Earth and Planetary Science Letters, 287(1-2), 24-30, https://doi.org/10.1016/j.epsl.2009.07.029 198-1209 COMPCORE Composite Core DEPTH sediment/rock Fraction Helium-3 Helium-3/Helium-4 Helium-4 Joides Resolution Leg198 Mass spectrometer noble gas MAP215-50 North Pacific Ocean Ocean Drilling Program ODP Dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.786024 https://doi.org/10.1016/j.epsl.2009.07.029 2023-01-20T08:54:59Z We attempt to constrain the variability of the flux of extraterrestrial 3He in the Paleocene by studying sediments from Shatsky Rise (Ocean Drilling Program, ODP Leg 198) that have tight orbital age control. 3He concentrations in Shatsky Rise sediments vary periodically at high frequency by about a factor of 6 over the 800-ka record analyzed. Virtually all of the sedimentary 3He (> 99.98%) is of extraterrestrial origin. The total helium in the sediments can be explained as a binary mixture of terrestrial and extraterrestrial components. We calculate an average 3He/4He ratio for the extraterrestrial endmember of 2.41 ± 0.29 * 10**-4, which is, remarkably, equal to that measured in present-day interplanetary dust particles. We determine a constant extraterrestrial 3He flux of 5.9 ± 0.9 * 10**-13 cm**3STP/cm**2/ ka for our 800-ka Paleocene record at ~ 58 Ma. This value is identical within error to those for the late Paleocene in sediments from the northern Pacific and the Weddell Sea. Bulk sediment MARs (derived using a constant extraterrestrial 3He flux) respond to climate-forced carbonate preservation cycles and changes in eolian flux over the late Paleocene. This is the first direct evidence for significant changes in dust accumulation in response to eccentricity forcing during a greenhouse climate interval. Dataset Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Weddell Sea Pacific Weddell ENVELOPE(158.505983,158.505983,32.651700,32.651700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
198-1209 COMPCORE Composite Core DEPTH sediment/rock Fraction Helium-3 Helium-3/Helium-4 Helium-4 Joides Resolution Leg198 Mass spectrometer noble gas MAP215-50 North Pacific Ocean Ocean Drilling Program ODP |
spellingShingle |
198-1209 COMPCORE Composite Core DEPTH sediment/rock Fraction Helium-3 Helium-3/Helium-4 Helium-4 Joides Resolution Leg198 Mass spectrometer noble gas MAP215-50 North Pacific Ocean Ocean Drilling Program ODP Marcantonio, Franco Thomas, Deborah J Woodard, Stella C McGee, David Winckler, Gisela (Table 1) Helium isotope ratio of ODP Site 198-1209 sediments |
topic_facet |
198-1209 COMPCORE Composite Core DEPTH sediment/rock Fraction Helium-3 Helium-3/Helium-4 Helium-4 Joides Resolution Leg198 Mass spectrometer noble gas MAP215-50 North Pacific Ocean Ocean Drilling Program ODP |
description |
We attempt to constrain the variability of the flux of extraterrestrial 3He in the Paleocene by studying sediments from Shatsky Rise (Ocean Drilling Program, ODP Leg 198) that have tight orbital age control. 3He concentrations in Shatsky Rise sediments vary periodically at high frequency by about a factor of 6 over the 800-ka record analyzed. Virtually all of the sedimentary 3He (> 99.98%) is of extraterrestrial origin. The total helium in the sediments can be explained as a binary mixture of terrestrial and extraterrestrial components. We calculate an average 3He/4He ratio for the extraterrestrial endmember of 2.41 ± 0.29 * 10**-4, which is, remarkably, equal to that measured in present-day interplanetary dust particles. We determine a constant extraterrestrial 3He flux of 5.9 ± 0.9 * 10**-13 cm**3STP/cm**2/ ka for our 800-ka Paleocene record at ~ 58 Ma. This value is identical within error to those for the late Paleocene in sediments from the northern Pacific and the Weddell Sea. Bulk sediment MARs (derived using a constant extraterrestrial 3He flux) respond to climate-forced carbonate preservation cycles and changes in eolian flux over the late Paleocene. This is the first direct evidence for significant changes in dust accumulation in response to eccentricity forcing during a greenhouse climate interval. |
format |
Dataset |
author |
Marcantonio, Franco Thomas, Deborah J Woodard, Stella C McGee, David Winckler, Gisela |
author_facet |
Marcantonio, Franco Thomas, Deborah J Woodard, Stella C McGee, David Winckler, Gisela |
author_sort |
Marcantonio, Franco |
title |
(Table 1) Helium isotope ratio of ODP Site 198-1209 sediments |
title_short |
(Table 1) Helium isotope ratio of ODP Site 198-1209 sediments |
title_full |
(Table 1) Helium isotope ratio of ODP Site 198-1209 sediments |
title_fullStr |
(Table 1) Helium isotope ratio of ODP Site 198-1209 sediments |
title_full_unstemmed |
(Table 1) Helium isotope ratio of ODP Site 198-1209 sediments |
title_sort |
(table 1) helium isotope ratio of odp site 198-1209 sediments |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.786024 https://doi.org/10.1594/PANGAEA.786024 |
op_coverage |
LATITUDE: 32.651700 * LONGITUDE: 158.505983 * DATE/TIME START: 2001-09-18T00:00:00 * DATE/TIME END: 2001-09-23T00:00:00 * MINIMUM DEPTH, sediment/rock: 229.93 m * MAXIMUM DEPTH, sediment/rock: 233.99 m |
long_lat |
ENVELOPE(158.505983,158.505983,32.651700,32.651700) |
geographic |
Weddell Sea Pacific Weddell |
geographic_facet |
Weddell Sea Pacific Weddell |
genre |
Weddell Sea |
genre_facet |
Weddell Sea |
op_source |
Supplement to: Marcantonio, Franco; Thomas, Deborah J; Woodard, Stella C; McGee, David; Winckler, Gisela (2009): Extraterrestrial 3He in Paleocene sediments from Shatsky Rise: Constraints on sedimentation rate variability. Earth and Planetary Science Letters, 287(1-2), 24-30, https://doi.org/10.1016/j.epsl.2009.07.029 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.786024 https://doi.org/10.1594/PANGAEA.786024 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.786024 https://doi.org/10.1016/j.epsl.2009.07.029 |
_version_ |
1766233647456714752 |