Organic chemistry of Neogene sediments from ODP Leg 113
Stable carbon and nitrogen isotopic compositions as well as organic carbon and total nitrogen contents of cored material are reported for the Weddell Sea, Ocean Drilling Program (ODP) Sites 689 and 690 (Maud Rise), Site 693 (continental margin), and Site 694 (abyssal plain). Results from both high r...
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1990
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.726518 2023-05-15T13:42:09+02:00 Organic chemistry of Neogene sediments from ODP Leg 113 Macko, Stephen A Pereira, Christopher PG MEDIAN LATITUDE: -66.607800 * MEDIAN LONGITUDE: -11.777710 * SOUTH-BOUND LATITUDE: -70.832000 * WEST-BOUND LONGITUDE: -33.447100 * NORTH-BOUND LATITUDE: -64.517000 * EAST-BOUND LONGITUDE: 3.100400 * DATE/TIME START: 1987-01-16T08:00:00 * DATE/TIME END: 1987-02-18T07:45:00 1990-08-11 application/zip, 10 datasets https://doi.pangaea.de/10.1594/PANGAEA.726518 https://doi.org/10.1594/PANGAEA.726518 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.726518 https://doi.org/10.1594/PANGAEA.726518 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Macko, Stephen A; Pereira, Christopher PG (1990): Neogene paleoclimate development of the Antarctic Weddell Sea region: organic geochemistry. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 881-897, https://doi.org/10.2973/odp.proc.sr.113.190.1990 113-689B 113-689C 113-689D 113-690A 113-690B 113-693A 113-693B 113-694A 113-694B 113-694C DRILL Drilling/drill rig Joides Resolution Leg113 Ocean Drilling Program ODP South Atlantic Ocean Weddell Sea Dataset 1990 ftpangaea https://doi.org/10.1594/PANGAEA.726518 https://doi.org/10.2973/odp.proc.sr.113.190.1990 2023-01-20T07:31:28Z Stable carbon and nitrogen isotopic compositions as well as organic carbon and total nitrogen contents of cored material are reported for the Weddell Sea, Ocean Drilling Program (ODP) Sites 689 and 690 (Maud Rise), Site 693 (continental margin), and Site 694 (abyssal plain). Results from both high resolution sampling (up to six samples per section) and low resolution (one sample per section) are documented. In general, these results indicate large changes in the types and amounts of carbon and nitrogen preserved in the sediments of the Weddell Sea region during the past 25 m.y., with an especially important and dramatic event coinciding with the western Antarctic ice-sheet becoming a semi-permanent or permanent feature about 5 Ma. The overall results may be correlated with the onset of major ice-sheets on West Antarctica, stabilization of the icesheet in the Pliocene and the intensified recycling of organic carbon and total nitrogen, which is possibly the result of increased ice cover. Evidence is also presented for either low production of organic carbon or the presence of a water column, in the eastern Weddell Sea during the early and middle Neogene, which was highly corrosive to organic matter. This condition, together with slow sediment accumulation rates, inhibited the preservation of carbon in the sediments. Dataset Antarc* Antarctic Antarctica Ice Sheet South Atlantic Ocean Weddell Sea West Antarctica PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Weddell Sea West Antarctica Weddell Maud Rise ENVELOPE(3.000,3.000,-66.000,-66.000) ENVELOPE(-33.447100,3.100400,-64.517000,-70.832000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
113-689B 113-689C 113-689D 113-690A 113-690B 113-693A 113-693B 113-694A 113-694B 113-694C DRILL Drilling/drill rig Joides Resolution Leg113 Ocean Drilling Program ODP South Atlantic Ocean Weddell Sea |
spellingShingle |
113-689B 113-689C 113-689D 113-690A 113-690B 113-693A 113-693B 113-694A 113-694B 113-694C DRILL Drilling/drill rig Joides Resolution Leg113 Ocean Drilling Program ODP South Atlantic Ocean Weddell Sea Macko, Stephen A Pereira, Christopher PG Organic chemistry of Neogene sediments from ODP Leg 113 |
topic_facet |
113-689B 113-689C 113-689D 113-690A 113-690B 113-693A 113-693B 113-694A 113-694B 113-694C DRILL Drilling/drill rig Joides Resolution Leg113 Ocean Drilling Program ODP South Atlantic Ocean Weddell Sea |
description |
Stable carbon and nitrogen isotopic compositions as well as organic carbon and total nitrogen contents of cored material are reported for the Weddell Sea, Ocean Drilling Program (ODP) Sites 689 and 690 (Maud Rise), Site 693 (continental margin), and Site 694 (abyssal plain). Results from both high resolution sampling (up to six samples per section) and low resolution (one sample per section) are documented. In general, these results indicate large changes in the types and amounts of carbon and nitrogen preserved in the sediments of the Weddell Sea region during the past 25 m.y., with an especially important and dramatic event coinciding with the western Antarctic ice-sheet becoming a semi-permanent or permanent feature about 5 Ma. The overall results may be correlated with the onset of major ice-sheets on West Antarctica, stabilization of the icesheet in the Pliocene and the intensified recycling of organic carbon and total nitrogen, which is possibly the result of increased ice cover. Evidence is also presented for either low production of organic carbon or the presence of a water column, in the eastern Weddell Sea during the early and middle Neogene, which was highly corrosive to organic matter. This condition, together with slow sediment accumulation rates, inhibited the preservation of carbon in the sediments. |
format |
Dataset |
author |
Macko, Stephen A Pereira, Christopher PG |
author_facet |
Macko, Stephen A Pereira, Christopher PG |
author_sort |
Macko, Stephen A |
title |
Organic chemistry of Neogene sediments from ODP Leg 113 |
title_short |
Organic chemistry of Neogene sediments from ODP Leg 113 |
title_full |
Organic chemistry of Neogene sediments from ODP Leg 113 |
title_fullStr |
Organic chemistry of Neogene sediments from ODP Leg 113 |
title_full_unstemmed |
Organic chemistry of Neogene sediments from ODP Leg 113 |
title_sort |
organic chemistry of neogene sediments from odp leg 113 |
publisher |
PANGAEA |
publishDate |
1990 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.726518 https://doi.org/10.1594/PANGAEA.726518 |
op_coverage |
MEDIAN LATITUDE: -66.607800 * MEDIAN LONGITUDE: -11.777710 * SOUTH-BOUND LATITUDE: -70.832000 * WEST-BOUND LONGITUDE: -33.447100 * NORTH-BOUND LATITUDE: -64.517000 * EAST-BOUND LONGITUDE: 3.100400 * DATE/TIME START: 1987-01-16T08:00:00 * DATE/TIME END: 1987-02-18T07:45:00 |
long_lat |
ENVELOPE(3.000,3.000,-66.000,-66.000) ENVELOPE(-33.447100,3.100400,-64.517000,-70.832000) |
geographic |
Antarctic Weddell Sea West Antarctica Weddell Maud Rise |
geographic_facet |
Antarctic Weddell Sea West Antarctica Weddell Maud Rise |
genre |
Antarc* Antarctic Antarctica Ice Sheet South Atlantic Ocean Weddell Sea West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet South Atlantic Ocean Weddell Sea West Antarctica |
op_source |
Supplement to: Macko, Stephen A; Pereira, Christopher PG (1990): Neogene paleoclimate development of the Antarctic Weddell Sea region: organic geochemistry. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 881-897, https://doi.org/10.2973/odp.proc.sr.113.190.1990 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.726518 https://doi.org/10.1594/PANGAEA.726518 |
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.726518 https://doi.org/10.2973/odp.proc.sr.113.190.1990 |
_version_ |
1766163527142211584 |