Isotopic and micropaleontological record of sediments of the Baffin Bay, supplement to: Hillaire-Marcel, Claude; de Vernal, Anne; Aksu, Ali E; Macko, Stephen A (1989): High-resolution isotopic and micropaleontological studies of Upper Pleistocene sediments at ODP Site 645, Baffin Bay. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 599-616
The oxygen and carbon isotopic compositions of the planktonic foraminifer, Neogloboquadrina pachyderma (sinistral), were determined at 20-cm intervals through the 'composite' top ~ 22 m of sediments at ODP Site 645 (Holes 645B, 645C, 645F, and 645G) and at 10-cm intervals through a 9-m pis...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA - Data Publisher for Earth & Environmental Science
1989
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.744850 https://doi.pangaea.de/10.1594/PANGAEA.744850 |
id |
ftdatacite:10.1594/pangaea.744850 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.744850 2023-05-15T15:35:00+02:00 Isotopic and micropaleontological record of sediments of the Baffin Bay, supplement to: Hillaire-Marcel, Claude; de Vernal, Anne; Aksu, Ali E; Macko, Stephen A (1989): High-resolution isotopic and micropaleontological studies of Upper Pleistocene sediments at ODP Site 645, Baffin Bay. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 599-616 Hillaire-Marcel, Claude de Vernal, Anne Aksu, Ali E Macko, Stephen A 1989 application/zip https://dx.doi.org/10.1594/pangaea.744850 https://doi.pangaea.de/10.1594/PANGAEA.744850 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.2973/odp.proc.sr.105.138.1989 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Composite Core Piston corer Trigger corer Leg105 Joides Resolution Ocean Drilling Program ODP Supplementary Collection of Datasets Collection article 1989 ftdatacite https://doi.org/10.1594/pangaea.744850 https://doi.org/10.2973/odp.proc.sr.105.138.1989 2022-02-08T16:24:46Z The oxygen and carbon isotopic compositions of the planktonic foraminifer, Neogloboquadrina pachyderma (sinistral), were determined at 20-cm intervals through the 'composite' top ~ 22 m of sediments at ODP Site 645 (Holes 645B, 645C, 645F, and 645G) and at 10-cm intervals through a 9-m piston core (85-027-016) collected during the Hudson site survey. Quantitative analyses of palynomorphs, notably dinocysts, and of planktonic foraminifers were performed. Organic and nitrogen contents and isotopic composition of nitrogen and carbon in organic matter also were determined. These data provide a high-resolution record of changes that occurred in surface-water masses during the last glacial cycle in Baffin Bay. The basin experienced low planktonic productivity during most of the late Pleistocene, either from dilution in surface water by meltwater discharges from the surrounding ice-sheet or from the presence of a relatively dense sea-ice cover. Peaks of meltwater discharge are indicated by d18O values as low as about 1.5 per mil, correlative d13C- d18O shifts, low concentration of planktonic foraminifers, high concentrations of glacially reworked pre-Quaternary palynomorphs, and low-salinity dinocyst assemblages. As a whole, d18O values ranging between 4.5 and 2.5 per mil allow the establishment of an 18O stratigraphy spanning isotopic stages 5 to 1. Because of the poor core recovery, the general paucity of microflora and microfauna, and the possible occurrence of slumping or debris flow at Site 645, further interpretation remains problematic. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Ice Sheet Neogloboquadrina pachyderma Sea ice DataCite Metadata Store (German National Library of Science and Technology) Baffin Bay Hudson |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Composite Core Piston corer Trigger corer Leg105 Joides Resolution Ocean Drilling Program ODP |
spellingShingle |
Composite Core Piston corer Trigger corer Leg105 Joides Resolution Ocean Drilling Program ODP Hillaire-Marcel, Claude de Vernal, Anne Aksu, Ali E Macko, Stephen A Isotopic and micropaleontological record of sediments of the Baffin Bay, supplement to: Hillaire-Marcel, Claude; de Vernal, Anne; Aksu, Ali E; Macko, Stephen A (1989): High-resolution isotopic and micropaleontological studies of Upper Pleistocene sediments at ODP Site 645, Baffin Bay. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 599-616 |
topic_facet |
Composite Core Piston corer Trigger corer Leg105 Joides Resolution Ocean Drilling Program ODP |
description |
The oxygen and carbon isotopic compositions of the planktonic foraminifer, Neogloboquadrina pachyderma (sinistral), were determined at 20-cm intervals through the 'composite' top ~ 22 m of sediments at ODP Site 645 (Holes 645B, 645C, 645F, and 645G) and at 10-cm intervals through a 9-m piston core (85-027-016) collected during the Hudson site survey. Quantitative analyses of palynomorphs, notably dinocysts, and of planktonic foraminifers were performed. Organic and nitrogen contents and isotopic composition of nitrogen and carbon in organic matter also were determined. These data provide a high-resolution record of changes that occurred in surface-water masses during the last glacial cycle in Baffin Bay. The basin experienced low planktonic productivity during most of the late Pleistocene, either from dilution in surface water by meltwater discharges from the surrounding ice-sheet or from the presence of a relatively dense sea-ice cover. Peaks of meltwater discharge are indicated by d18O values as low as about 1.5 per mil, correlative d13C- d18O shifts, low concentration of planktonic foraminifers, high concentrations of glacially reworked pre-Quaternary palynomorphs, and low-salinity dinocyst assemblages. As a whole, d18O values ranging between 4.5 and 2.5 per mil allow the establishment of an 18O stratigraphy spanning isotopic stages 5 to 1. Because of the poor core recovery, the general paucity of microflora and microfauna, and the possible occurrence of slumping or debris flow at Site 645, further interpretation remains problematic. |
format |
Article in Journal/Newspaper |
author |
Hillaire-Marcel, Claude de Vernal, Anne Aksu, Ali E Macko, Stephen A |
author_facet |
Hillaire-Marcel, Claude de Vernal, Anne Aksu, Ali E Macko, Stephen A |
author_sort |
Hillaire-Marcel, Claude |
title |
Isotopic and micropaleontological record of sediments of the Baffin Bay, supplement to: Hillaire-Marcel, Claude; de Vernal, Anne; Aksu, Ali E; Macko, Stephen A (1989): High-resolution isotopic and micropaleontological studies of Upper Pleistocene sediments at ODP Site 645, Baffin Bay. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 599-616 |
title_short |
Isotopic and micropaleontological record of sediments of the Baffin Bay, supplement to: Hillaire-Marcel, Claude; de Vernal, Anne; Aksu, Ali E; Macko, Stephen A (1989): High-resolution isotopic and micropaleontological studies of Upper Pleistocene sediments at ODP Site 645, Baffin Bay. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 599-616 |
title_full |
Isotopic and micropaleontological record of sediments of the Baffin Bay, supplement to: Hillaire-Marcel, Claude; de Vernal, Anne; Aksu, Ali E; Macko, Stephen A (1989): High-resolution isotopic and micropaleontological studies of Upper Pleistocene sediments at ODP Site 645, Baffin Bay. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 599-616 |
title_fullStr |
Isotopic and micropaleontological record of sediments of the Baffin Bay, supplement to: Hillaire-Marcel, Claude; de Vernal, Anne; Aksu, Ali E; Macko, Stephen A (1989): High-resolution isotopic and micropaleontological studies of Upper Pleistocene sediments at ODP Site 645, Baffin Bay. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 599-616 |
title_full_unstemmed |
Isotopic and micropaleontological record of sediments of the Baffin Bay, supplement to: Hillaire-Marcel, Claude; de Vernal, Anne; Aksu, Ali E; Macko, Stephen A (1989): High-resolution isotopic and micropaleontological studies of Upper Pleistocene sediments at ODP Site 645, Baffin Bay. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 599-616 |
title_sort |
isotopic and micropaleontological record of sediments of the baffin bay, supplement to: hillaire-marcel, claude; de vernal, anne; aksu, ali e; macko, stephen a (1989): high-resolution isotopic and micropaleontological studies of upper pleistocene sediments at odp site 645, baffin bay. in: srivastava, sp; arthur, m; clement, b; et al. (eds.), proceedings of the ocean drilling program, scientific results, college station, tx (ocean drilling program), 105, 599-616 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1989 |
url |
https://dx.doi.org/10.1594/pangaea.744850 https://doi.pangaea.de/10.1594/PANGAEA.744850 |
geographic |
Baffin Bay Hudson |
geographic_facet |
Baffin Bay Hudson |
genre |
Baffin Bay Baffin Bay Baffin Ice Sheet Neogloboquadrina pachyderma Sea ice |
genre_facet |
Baffin Bay Baffin Bay Baffin Ice Sheet Neogloboquadrina pachyderma Sea ice |
op_relation |
https://dx.doi.org/10.2973/odp.proc.sr.105.138.1989 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.744850 https://doi.org/10.2973/odp.proc.sr.105.138.1989 |
_version_ |
1766365290284711936 |