Nd-Sr isotopes in fossil fish debris from IODP Exp302
Strontium and neodymium radiogenic isotope ratios in early to middle Eocene fossil fish debris (ichthyoliths) from Lomonosov Ridge (Integrated Ocean Drilling Program Expedition 302) help constrain water mass compositions in the Eocene Arctic Ocean between 55 and 45 Ma. The inferred paleodepositional...
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.787111 https://doi.org/10.1594/PANGAEA.787111 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.787111 2024-09-15T17:50:59+00:00 Nd-Sr isotopes in fossil fish debris from IODP Exp302 Gleason, James D Thomas, Deborah J Moore, Theodore C Blum, Joel D Owen, Robert M Haley, Brian A MEDIAN LATITUDE: 87.893021 * MEDIAN LONGITUDE: 137.717683 * SOUTH-BOUND LATITUDE: 87.866580 * WEST-BOUND LONGITUDE: 136.174580 * NORTH-BOUND LATITUDE: 87.921180 * EAST-BOUND LONGITUDE: 139.365010 * DATE/TIME START: 2004-08-19T00:00:00 * DATE/TIME END: 2004-09-02T00:00:00 2012 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.787111 https://doi.org/10.1594/PANGAEA.787111 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.787111 https://doi.org/10.1594/PANGAEA.787111 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Gleason, James D; Thomas, Deborah J; Moore, Theodore C; Blum, Joel D; Owen, Robert M; Haley, Brian A (2009): Early to middle Eocene history of the Arctic Ocean from Nd-Sr isotopes in fossil fish debris, Lomonosov Ridge. Paleoceanography, 24(2), PA2215, https://doi.org/10.1029/2008PA001685 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP dataset publication series 2012 ftpangaea https://doi.org/10.1594/PANGAEA.78711110.1029/2008PA001685 2024-07-24T02:31:21Z Strontium and neodymium radiogenic isotope ratios in early to middle Eocene fossil fish debris (ichthyoliths) from Lomonosov Ridge (Integrated Ocean Drilling Program Expedition 302) help constrain water mass compositions in the Eocene Arctic Ocean between 55 and 45 Ma. The inferred paleodepositional setting was a shallow, offshore marine to marginal marine environment with limited connections to surrounding ocean basins. The new data demonstrate that sources of Nd and Sr in fish debris were distinct from each other, consistent with a salinity-stratified water column above Lomonosov Ridge in the Eocene. The 87Sr/86Sr values of ichthyoliths (0.7079 - 0.7087) are more radiogenic than Eocene seawater, requiring brackish to fresh water conditions in the environment where fish metabolized Sr. The 87Sr/86Sr variations probably record changes in the overall balance of river Sr flux to the Eocene Arctic Ocean between 55 and 45 Ma and are used here to reconstruct surface water salinity values. The eNd values of ichthyoliths vary between -5.7 and -7.8, compatible with periodic (or intermittent) supply of Nd to Eocene Arctic intermediate water (AIW) from adjacent seas. Although the Norwegian-Greenland Sea and North Atlantic Ocean were the most likely sources of Eocene AIW Nd, input from the Tethys Sea (via the Turgay Strait in early Eocene time) and the North Pacific Ocean (via a proto-Bering Strait) also contributed. Other/Unknown Material Arctic Arctic Ocean Bering Strait Greenland Greenland Sea Lomonosov Ridge North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(136.174580,139.365010,87.921180,87.866580) |
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 |
spellingShingle |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Gleason, James D Thomas, Deborah J Moore, Theodore C Blum, Joel D Owen, Robert M Haley, Brian A Nd-Sr isotopes in fossil fish debris from IODP Exp302 |
topic_facet |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP |
description |
Strontium and neodymium radiogenic isotope ratios in early to middle Eocene fossil fish debris (ichthyoliths) from Lomonosov Ridge (Integrated Ocean Drilling Program Expedition 302) help constrain water mass compositions in the Eocene Arctic Ocean between 55 and 45 Ma. The inferred paleodepositional setting was a shallow, offshore marine to marginal marine environment with limited connections to surrounding ocean basins. The new data demonstrate that sources of Nd and Sr in fish debris were distinct from each other, consistent with a salinity-stratified water column above Lomonosov Ridge in the Eocene. The 87Sr/86Sr values of ichthyoliths (0.7079 - 0.7087) are more radiogenic than Eocene seawater, requiring brackish to fresh water conditions in the environment where fish metabolized Sr. The 87Sr/86Sr variations probably record changes in the overall balance of river Sr flux to the Eocene Arctic Ocean between 55 and 45 Ma and are used here to reconstruct surface water salinity values. The eNd values of ichthyoliths vary between -5.7 and -7.8, compatible with periodic (or intermittent) supply of Nd to Eocene Arctic intermediate water (AIW) from adjacent seas. Although the Norwegian-Greenland Sea and North Atlantic Ocean were the most likely sources of Eocene AIW Nd, input from the Tethys Sea (via the Turgay Strait in early Eocene time) and the North Pacific Ocean (via a proto-Bering Strait) also contributed. |
format |
Other/Unknown Material |
author |
Gleason, James D Thomas, Deborah J Moore, Theodore C Blum, Joel D Owen, Robert M Haley, Brian A |
author_facet |
Gleason, James D Thomas, Deborah J Moore, Theodore C Blum, Joel D Owen, Robert M Haley, Brian A |
author_sort |
Gleason, James D |
title |
Nd-Sr isotopes in fossil fish debris from IODP Exp302 |
title_short |
Nd-Sr isotopes in fossil fish debris from IODP Exp302 |
title_full |
Nd-Sr isotopes in fossil fish debris from IODP Exp302 |
title_fullStr |
Nd-Sr isotopes in fossil fish debris from IODP Exp302 |
title_full_unstemmed |
Nd-Sr isotopes in fossil fish debris from IODP Exp302 |
title_sort |
nd-sr isotopes in fossil fish debris from iodp exp302 |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.787111 https://doi.org/10.1594/PANGAEA.787111 |
op_coverage |
MEDIAN LATITUDE: 87.893021 * MEDIAN LONGITUDE: 137.717683 * SOUTH-BOUND LATITUDE: 87.866580 * WEST-BOUND LONGITUDE: 136.174580 * NORTH-BOUND LATITUDE: 87.921180 * EAST-BOUND LONGITUDE: 139.365010 * DATE/TIME START: 2004-08-19T00:00:00 * DATE/TIME END: 2004-09-02T00:00:00 |
long_lat |
ENVELOPE(136.174580,139.365010,87.921180,87.866580) |
genre |
Arctic Arctic Ocean Bering Strait Greenland Greenland Sea Lomonosov Ridge North Atlantic |
genre_facet |
Arctic Arctic Ocean Bering Strait Greenland Greenland Sea Lomonosov Ridge North Atlantic |
op_source |
Supplement to: Gleason, James D; Thomas, Deborah J; Moore, Theodore C; Blum, Joel D; Owen, Robert M; Haley, Brian A (2009): Early to middle Eocene history of the Arctic Ocean from Nd-Sr isotopes in fossil fish debris, Lomonosov Ridge. Paleoceanography, 24(2), PA2215, https://doi.org/10.1029/2008PA001685 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.787111 https://doi.org/10.1594/PANGAEA.787111 |
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.78711110.1029/2008PA001685 |
_version_ |
1810292787480887296 |