(Table 1) Strontium isotope ratios (87Sr/86Sr) of Neogloboquadrina pachyderma (sinistrally coiling) tests from ODP Hole 151-910A
The sediment sequence at Ocean Drilling Program (ODP) Site 910 (556 m water depth) on the Yermak Plateau in the Arctic Ocean features a remarkable "overconsolidated section" from ~19 to 70-95 m below sea floor (m bsf), marked by large increases in bulk density and sediment strength. The OD...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.712046 2024-09-15T17:50:42+00:00 (Table 1) Strontium isotope ratios (87Sr/86Sr) of Neogloboquadrina pachyderma (sinistrally coiling) tests from ODP Hole 151-910A Flower, Benjamin P LATITUDE: 80.264700 * LONGITUDE: 6.590000 * DATE/TIME START: 1993-08-17T15:30:00 * DATE/TIME END: 1993-08-17T23:38:00 * MINIMUM ELEVATION: -567.0 m * MAXIMUM ELEVATION: -567.0 m 1997 text/tab-separated-values, 12 data points https://doi.pangaea.de/10.1594/PANGAEA.712046 https://doi.org/10.1594/PANGAEA.712046 en eng PANGAEA Flower, Benjamin P (1997): Overconsolidated section on the Yermak Plateau, Arctic Ocean: Ice sheet grounding prior to ca. 660 ka? Geology, 25(2), 147-150, https://doi.org/10.1130/0091-7613(1997)025%3C0147:OSOTYP%3E2.3.CO;2 https://doi.pangaea.de/10.1594/PANGAEA.712046 https://doi.org/10.1594/PANGAEA.712046 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess 151-910A Depth bottom/max top/min DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Isotope ratio mass spectrometry Joides Resolution Leg151 North Greenland Sea Ocean Drilling Program ODP Sample code/label Strontium-87/Strontium-86 ratio dataset 1997 ftpangaea https://doi.org/10.1594/PANGAEA.712046 2024-07-24T02:31:30Z The sediment sequence at Ocean Drilling Program (ODP) Site 910 (556 m water depth) on the Yermak Plateau in the Arctic Ocean features a remarkable "overconsolidated section" from ~19 to 70-95 m below sea floor (m bsf), marked by large increases in bulk density and sediment strength. The ODP Leg 151 Shipboard Scientific Party interpreted the overconsolidated section to be caused by (1) grounding of a marine-based ice sheet, derived from Svalbard and perhaps the Barents Sea ice sheet, and/or (2) coarser-grained glacial sedimentation, which allowed increased compaction. Here I present planktonic foraminiferal d18O data based on Neogloboquadrina pachyderma (sinistrally coiling) that date the termination of overconsolidation near the boundary between isotope stages 16 and 17 (ca. 660 ka). No evidence is found for coarser grained sedimentation, because lithic fragments >150 µm exhibit similar mean concentrations throughout the upper 24.5 m bsf. The overconsolidated section may reflect more extensive ice-sheet grounding prior to ca. 660 ka, suggesting a major change in state of the Svalbard ice sheets during the mid-Quaternary. Furthermore, continuous sedimentation since that time argues against a pervasive Arctic ice shelf impinged on the Yermak Plateau during the past 660 k.y. These findings suggest that Svalbard ice-sheet history was largely independent of circum-Arctic ice-sheet history during the middle to late Quaternary. Dataset Arctic Arctic Ocean Barents Sea Foraminifera* Greenland Greenland Sea Ice Sheet Ice Shelf Neogloboquadrina pachyderma North Greenland Sea ice Svalbard Yermak plateau PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(6.590000,6.590000,80.264700,80.264700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
151-910A Depth bottom/max top/min DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Isotope ratio mass spectrometry Joides Resolution Leg151 North Greenland Sea Ocean Drilling Program ODP Sample code/label Strontium-87/Strontium-86 ratio |
spellingShingle |
151-910A Depth bottom/max top/min DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Isotope ratio mass spectrometry Joides Resolution Leg151 North Greenland Sea Ocean Drilling Program ODP Sample code/label Strontium-87/Strontium-86 ratio Flower, Benjamin P (Table 1) Strontium isotope ratios (87Sr/86Sr) of Neogloboquadrina pachyderma (sinistrally coiling) tests from ODP Hole 151-910A |
topic_facet |
151-910A Depth bottom/max top/min DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Isotope ratio mass spectrometry Joides Resolution Leg151 North Greenland Sea Ocean Drilling Program ODP Sample code/label Strontium-87/Strontium-86 ratio |
description |
The sediment sequence at Ocean Drilling Program (ODP) Site 910 (556 m water depth) on the Yermak Plateau in the Arctic Ocean features a remarkable "overconsolidated section" from ~19 to 70-95 m below sea floor (m bsf), marked by large increases in bulk density and sediment strength. The ODP Leg 151 Shipboard Scientific Party interpreted the overconsolidated section to be caused by (1) grounding of a marine-based ice sheet, derived from Svalbard and perhaps the Barents Sea ice sheet, and/or (2) coarser-grained glacial sedimentation, which allowed increased compaction. Here I present planktonic foraminiferal d18O data based on Neogloboquadrina pachyderma (sinistrally coiling) that date the termination of overconsolidation near the boundary between isotope stages 16 and 17 (ca. 660 ka). No evidence is found for coarser grained sedimentation, because lithic fragments >150 µm exhibit similar mean concentrations throughout the upper 24.5 m bsf. The overconsolidated section may reflect more extensive ice-sheet grounding prior to ca. 660 ka, suggesting a major change in state of the Svalbard ice sheets during the mid-Quaternary. Furthermore, continuous sedimentation since that time argues against a pervasive Arctic ice shelf impinged on the Yermak Plateau during the past 660 k.y. These findings suggest that Svalbard ice-sheet history was largely independent of circum-Arctic ice-sheet history during the middle to late Quaternary. |
format |
Dataset |
author |
Flower, Benjamin P |
author_facet |
Flower, Benjamin P |
author_sort |
Flower, Benjamin P |
title |
(Table 1) Strontium isotope ratios (87Sr/86Sr) of Neogloboquadrina pachyderma (sinistrally coiling) tests from ODP Hole 151-910A |
title_short |
(Table 1) Strontium isotope ratios (87Sr/86Sr) of Neogloboquadrina pachyderma (sinistrally coiling) tests from ODP Hole 151-910A |
title_full |
(Table 1) Strontium isotope ratios (87Sr/86Sr) of Neogloboquadrina pachyderma (sinistrally coiling) tests from ODP Hole 151-910A |
title_fullStr |
(Table 1) Strontium isotope ratios (87Sr/86Sr) of Neogloboquadrina pachyderma (sinistrally coiling) tests from ODP Hole 151-910A |
title_full_unstemmed |
(Table 1) Strontium isotope ratios (87Sr/86Sr) of Neogloboquadrina pachyderma (sinistrally coiling) tests from ODP Hole 151-910A |
title_sort |
(table 1) strontium isotope ratios (87sr/86sr) of neogloboquadrina pachyderma (sinistrally coiling) tests from odp hole 151-910a |
publisher |
PANGAEA |
publishDate |
1997 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.712046 https://doi.org/10.1594/PANGAEA.712046 |
op_coverage |
LATITUDE: 80.264700 * LONGITUDE: 6.590000 * DATE/TIME START: 1993-08-17T15:30:00 * DATE/TIME END: 1993-08-17T23:38:00 * MINIMUM ELEVATION: -567.0 m * MAXIMUM ELEVATION: -567.0 m |
long_lat |
ENVELOPE(6.590000,6.590000,80.264700,80.264700) |
genre |
Arctic Arctic Ocean Barents Sea Foraminifera* Greenland Greenland Sea Ice Sheet Ice Shelf Neogloboquadrina pachyderma North Greenland Sea ice Svalbard Yermak plateau |
genre_facet |
Arctic Arctic Ocean Barents Sea Foraminifera* Greenland Greenland Sea Ice Sheet Ice Shelf Neogloboquadrina pachyderma North Greenland Sea ice Svalbard Yermak plateau |
op_relation |
Flower, Benjamin P (1997): Overconsolidated section on the Yermak Plateau, Arctic Ocean: Ice sheet grounding prior to ca. 660 ka? Geology, 25(2), 147-150, https://doi.org/10.1130/0091-7613(1997)025%3C0147:OSOTYP%3E2.3.CO;2 https://doi.pangaea.de/10.1594/PANGAEA.712046 https://doi.org/10.1594/PANGAEA.712046 |
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.712046 |
_version_ |
1810292517439012864 |