Neodymium, lead and strontium isotope data of down core leachate and bulk digest of ODP Hole 151-911A
Water mass exchange between the Arctic Ocean and the Norwegian-Greenland Seas has played an important role for the Atlantic thermohaline circulation and Northern Hemisphere climate. We reconstruct past water mass mixing and erosional inputs from the radiogenic isotope compositions of neodymium (Nd),...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.871924 2024-09-15T17:50:42+00:00 Neodymium, lead and strontium isotope data of down core leachate and bulk digest of ODP Hole 151-911A Teschner, Claudia Frank, Martin Haley, Brian A Knies, Jochen LATITUDE: 80.477430 * LONGITUDE: 8.227300 * DATE/TIME START: 1993-08-22T06:15:00 * DATE/TIME END: 1993-08-26T21:34:00 2016 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.871924 https://doi.org/10.1594/PANGAEA.871924 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.871924 https://doi.org/10.1594/PANGAEA.871924 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Teschner, Claudia; Frank, Martin; Haley, Brian A; Knies, Jochen (2016): Plio-Pleistocene evolution of water mass exchange and erosional input at the Atlantic-Arctic gateway. Paleoceanography, 31(5), 582-599, https://doi.org/10.1002/2015PA002843 151-911A DRILL Drilling/drill rig Joides Resolution Leg151 North Greenland Sea Ocean Drilling Program ODP dataset publication series 2016 ftpangaea https://doi.org/10.1594/PANGAEA.87192410.1002/2015PA002843 2024-07-24T02:31:21Z Water mass exchange between the Arctic Ocean and the Norwegian-Greenland Seas has played an important role for the Atlantic thermohaline circulation and Northern Hemisphere climate. We reconstruct past water mass mixing and erosional inputs from the radiogenic isotope compositions of neodymium (Nd), lead (Pb), and strontium (Sr) at Ocean Drilling Program site 911 (leg 151) from 906 m water depth on Yermak Plateau in the Fram Strait over the past 5.2 Myr. The isotopic compositions of past bottom waters were extracted from authigenic oxyhydroxide coatings of the bulk sediments. Neodymium isotope signatures obtained from surface sediments agree well with present-day deepwater epsilon-Nd signature of -11.0 ± 0.2. Prior to 2.7 Ma the Nd and Pb isotope compositions of the bottom waters only show small variations indicative of a consistent influence of Atlantic waters. Since the major intensification of the Northern Hemisphere Glaciation at 2.7 Ma the seawater Nd isotope composition has varied more pronouncedly due to changes in weathering inputs related to the waxing and waning of the ice sheets on Svalbard, the Barents Sea, and the Eurasian shelf, due to changes in water mass exchange and due to the increasing supply of ice-rafted debris (IRD) originating from the Arctic Ocean. The seawater Pb isotope record also exhibits a higher short-term variability after 2.7 Ma, but there is also a trend toward more radiogenic values, which reflects a combination of changes in input sources and enhanced incongruent weathering inputs of Pb released from freshly eroded old continental rocks. Other/Unknown Material Arctic Arctic Ocean Barents Sea Fram Strait Greenland Greenland Sea North Greenland Svalbard Yermak plateau PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(8.227300,8.227300,80.477430,80.477430) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
151-911A DRILL Drilling/drill rig Joides Resolution Leg151 North Greenland Sea Ocean Drilling Program ODP |
spellingShingle |
151-911A DRILL Drilling/drill rig Joides Resolution Leg151 North Greenland Sea Ocean Drilling Program ODP Teschner, Claudia Frank, Martin Haley, Brian A Knies, Jochen Neodymium, lead and strontium isotope data of down core leachate and bulk digest of ODP Hole 151-911A |
topic_facet |
151-911A DRILL Drilling/drill rig Joides Resolution Leg151 North Greenland Sea Ocean Drilling Program ODP |
description |
Water mass exchange between the Arctic Ocean and the Norwegian-Greenland Seas has played an important role for the Atlantic thermohaline circulation and Northern Hemisphere climate. We reconstruct past water mass mixing and erosional inputs from the radiogenic isotope compositions of neodymium (Nd), lead (Pb), and strontium (Sr) at Ocean Drilling Program site 911 (leg 151) from 906 m water depth on Yermak Plateau in the Fram Strait over the past 5.2 Myr. The isotopic compositions of past bottom waters were extracted from authigenic oxyhydroxide coatings of the bulk sediments. Neodymium isotope signatures obtained from surface sediments agree well with present-day deepwater epsilon-Nd signature of -11.0 ± 0.2. Prior to 2.7 Ma the Nd and Pb isotope compositions of the bottom waters only show small variations indicative of a consistent influence of Atlantic waters. Since the major intensification of the Northern Hemisphere Glaciation at 2.7 Ma the seawater Nd isotope composition has varied more pronouncedly due to changes in weathering inputs related to the waxing and waning of the ice sheets on Svalbard, the Barents Sea, and the Eurasian shelf, due to changes in water mass exchange and due to the increasing supply of ice-rafted debris (IRD) originating from the Arctic Ocean. The seawater Pb isotope record also exhibits a higher short-term variability after 2.7 Ma, but there is also a trend toward more radiogenic values, which reflects a combination of changes in input sources and enhanced incongruent weathering inputs of Pb released from freshly eroded old continental rocks. |
format |
Other/Unknown Material |
author |
Teschner, Claudia Frank, Martin Haley, Brian A Knies, Jochen |
author_facet |
Teschner, Claudia Frank, Martin Haley, Brian A Knies, Jochen |
author_sort |
Teschner, Claudia |
title |
Neodymium, lead and strontium isotope data of down core leachate and bulk digest of ODP Hole 151-911A |
title_short |
Neodymium, lead and strontium isotope data of down core leachate and bulk digest of ODP Hole 151-911A |
title_full |
Neodymium, lead and strontium isotope data of down core leachate and bulk digest of ODP Hole 151-911A |
title_fullStr |
Neodymium, lead and strontium isotope data of down core leachate and bulk digest of ODP Hole 151-911A |
title_full_unstemmed |
Neodymium, lead and strontium isotope data of down core leachate and bulk digest of ODP Hole 151-911A |
title_sort |
neodymium, lead and strontium isotope data of down core leachate and bulk digest of odp hole 151-911a |
publisher |
PANGAEA |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.871924 https://doi.org/10.1594/PANGAEA.871924 |
op_coverage |
LATITUDE: 80.477430 * LONGITUDE: 8.227300 * DATE/TIME START: 1993-08-22T06:15:00 * DATE/TIME END: 1993-08-26T21:34:00 |
long_lat |
ENVELOPE(8.227300,8.227300,80.477430,80.477430) |
genre |
Arctic Arctic Ocean Barents Sea Fram Strait Greenland Greenland Sea North Greenland Svalbard Yermak plateau |
genre_facet |
Arctic Arctic Ocean Barents Sea Fram Strait Greenland Greenland Sea North Greenland Svalbard Yermak plateau |
op_source |
Supplement to: Teschner, Claudia; Frank, Martin; Haley, Brian A; Knies, Jochen (2016): Plio-Pleistocene evolution of water mass exchange and erosional input at the Atlantic-Arctic gateway. Paleoceanography, 31(5), 582-599, https://doi.org/10.1002/2015PA002843 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.871924 https://doi.org/10.1594/PANGAEA.871924 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.87192410.1002/2015PA002843 |
_version_ |
1810292517619367936 |