Argon and neodymium concentrations of ODP Site 145-884
A large sediment deposit known as the Meiji Drift, located in the northwestern Pacific Ocean, is thought to have formed from deep water exiting the Bering Sea, although no notable deep water forms there presently. We determine the terrigenous sources since 140 ka to the drift using bulk sediment 40A...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.720976 2023-05-15T15:43:29+02:00 Argon and neodymium concentrations of ODP Site 145-884 VanLaningham, Sam Pisias, Nicklas G Duncan, Robert A Clift, Peter D MEDIAN LATITUDE: 51.450500 * MEDIAN LONGITUDE: 168.336917 * SOUTH-BOUND LATITUDE: 51.450400 * WEST-BOUND LONGITUDE: 168.336600 * NORTH-BOUND LATITUDE: 51.450600 * EAST-BOUND LONGITUDE: 168.337100 * DATE/TIME START: 1992-08-20T18:00:00 * DATE/TIME END: 1992-08-26T01:45:00 2009-06-18 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.720976 https://doi.org/10.1594/PANGAEA.720976 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.720976 https://doi.org/10.1594/PANGAEA.720976 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: VanLaningham, Sam; Pisias, Nicklas G; Duncan, Robert A; Clift, Peter D (2009): Glacial-interglacial sediment transport to the Meiji Drift, northwest Pacific Ocean: Evidence for timing of Beringian outwashing. Earth and Planetary Science Letters, 277(1-2), 64-72, https://doi.org/10.1016/j.epsl.2008.09.033 145-884B 145-884C 145-884D DRILL Drilling/drill rig Joides Resolution Leg145 North Pacific Ocean Ocean Drilling Program ODP Dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.720976 https://doi.org/10.1016/j.epsl.2008.09.033 2023-01-20T07:31:25Z A large sediment deposit known as the Meiji Drift, located in the northwestern Pacific Ocean, is thought to have formed from deep water exiting the Bering Sea, although no notable deep water forms there presently. We determine the terrigenous sources since 140 ka to the drift using bulk sediment 40Ar-39Ar and Nd isotopic analyses on the silt-sized (20-63 µm) terrigenous fraction from Ocean Drilling Program (ODP) Site 884 to reconstruct paleo-circulation patterns. There are large changes in both isotopic tracers, varying on glacial-interglacial cycles. During glacial intervals, bulk sediment 40Ar-39Ar ages range between 40 and 80 Ma, while Nd isotopic values range from epsilon-Nd = -1 to +2. During interglacial intervals, sediments become much younger and more radiogenic, with bulk sediment ages falling to 2-15 Ma and Nd isotopic values ranging between epsilon-Nd = +5 and +9. These data and quantitative comparison to potential source rocks indicate that the young Kamchatkan and Aleutian Arcs, lying NW and NE of the Meiji Drift, contribute the majority of sediment during interglacials. Conversely, older source rocks, such as those drained by the Yukon River and northeast Russia are the dominant origin of sediments during glacials. Mixing model calculations suggest that as much as 35-45% of the sediment deposited in the Meiji Drift during glacials is from the Bering Sea. It remains unclear whether thermohaline-type circulation or focussing of Bering Sea flow lead to the glacial-interglacial sediment source changes observed here. Dataset Bering Sea Yukon river Yukon PANGAEA - Data Publisher for Earth & Environmental Science Bering Sea Pacific Yukon ENVELOPE(168.336600,168.337100,51.450600,51.450400) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
145-884B 145-884C 145-884D DRILL Drilling/drill rig Joides Resolution Leg145 North Pacific Ocean Ocean Drilling Program ODP |
spellingShingle |
145-884B 145-884C 145-884D DRILL Drilling/drill rig Joides Resolution Leg145 North Pacific Ocean Ocean Drilling Program ODP VanLaningham, Sam Pisias, Nicklas G Duncan, Robert A Clift, Peter D Argon and neodymium concentrations of ODP Site 145-884 |
topic_facet |
145-884B 145-884C 145-884D DRILL Drilling/drill rig Joides Resolution Leg145 North Pacific Ocean Ocean Drilling Program ODP |
description |
A large sediment deposit known as the Meiji Drift, located in the northwestern Pacific Ocean, is thought to have formed from deep water exiting the Bering Sea, although no notable deep water forms there presently. We determine the terrigenous sources since 140 ka to the drift using bulk sediment 40Ar-39Ar and Nd isotopic analyses on the silt-sized (20-63 µm) terrigenous fraction from Ocean Drilling Program (ODP) Site 884 to reconstruct paleo-circulation patterns. There are large changes in both isotopic tracers, varying on glacial-interglacial cycles. During glacial intervals, bulk sediment 40Ar-39Ar ages range between 40 and 80 Ma, while Nd isotopic values range from epsilon-Nd = -1 to +2. During interglacial intervals, sediments become much younger and more radiogenic, with bulk sediment ages falling to 2-15 Ma and Nd isotopic values ranging between epsilon-Nd = +5 and +9. These data and quantitative comparison to potential source rocks indicate that the young Kamchatkan and Aleutian Arcs, lying NW and NE of the Meiji Drift, contribute the majority of sediment during interglacials. Conversely, older source rocks, such as those drained by the Yukon River and northeast Russia are the dominant origin of sediments during glacials. Mixing model calculations suggest that as much as 35-45% of the sediment deposited in the Meiji Drift during glacials is from the Bering Sea. It remains unclear whether thermohaline-type circulation or focussing of Bering Sea flow lead to the glacial-interglacial sediment source changes observed here. |
format |
Dataset |
author |
VanLaningham, Sam Pisias, Nicklas G Duncan, Robert A Clift, Peter D |
author_facet |
VanLaningham, Sam Pisias, Nicklas G Duncan, Robert A Clift, Peter D |
author_sort |
VanLaningham, Sam |
title |
Argon and neodymium concentrations of ODP Site 145-884 |
title_short |
Argon and neodymium concentrations of ODP Site 145-884 |
title_full |
Argon and neodymium concentrations of ODP Site 145-884 |
title_fullStr |
Argon and neodymium concentrations of ODP Site 145-884 |
title_full_unstemmed |
Argon and neodymium concentrations of ODP Site 145-884 |
title_sort |
argon and neodymium concentrations of odp site 145-884 |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.720976 https://doi.org/10.1594/PANGAEA.720976 |
op_coverage |
MEDIAN LATITUDE: 51.450500 * MEDIAN LONGITUDE: 168.336917 * SOUTH-BOUND LATITUDE: 51.450400 * WEST-BOUND LONGITUDE: 168.336600 * NORTH-BOUND LATITUDE: 51.450600 * EAST-BOUND LONGITUDE: 168.337100 * DATE/TIME START: 1992-08-20T18:00:00 * DATE/TIME END: 1992-08-26T01:45:00 |
long_lat |
ENVELOPE(168.336600,168.337100,51.450600,51.450400) |
geographic |
Bering Sea Pacific Yukon |
geographic_facet |
Bering Sea Pacific Yukon |
genre |
Bering Sea Yukon river Yukon |
genre_facet |
Bering Sea Yukon river Yukon |
op_source |
Supplement to: VanLaningham, Sam; Pisias, Nicklas G; Duncan, Robert A; Clift, Peter D (2009): Glacial-interglacial sediment transport to the Meiji Drift, northwest Pacific Ocean: Evidence for timing of Beringian outwashing. Earth and Planetary Science Letters, 277(1-2), 64-72, https://doi.org/10.1016/j.epsl.2008.09.033 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.720976 https://doi.org/10.1594/PANGAEA.720976 |
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.720976 https://doi.org/10.1016/j.epsl.2008.09.033 |
_version_ |
1766377655575248896 |