Oxygen- and carbon-isotopes at DSDP Leg 73 Holes, supplement to: Weissert, Helmut J; McKenzie, Judith A; Wright, R; Clark, Murlene W; Oberhänsli, Hedi; Casey, Martin (1984): Paleoclimatic record of the Pliocene at Deep Sea Drilling Project Sites 519, 521, 522, and 523 (Central South Atlantic). In: Hsü, KJ; LaBrecque, JL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 73, 701-715
We established a composite oxygen- and carbon-isotope stratigraphy for the Pliocene in the central South Atlantic. Monospecific samples of benthic and planktonic foraminifers from pelagic sediments from DSDP Sites 519, 521, 522, and 523 were analyzed isotopically. The resulting benthic oxygen-isotop...
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ftdatacite:10.1594/pangaea.811212 2023-05-15T13:56:05+02:00 Oxygen- and carbon-isotopes at DSDP Leg 73 Holes, supplement to: Weissert, Helmut J; McKenzie, Judith A; Wright, R; Clark, Murlene W; Oberhänsli, Hedi; Casey, Martin (1984): Paleoclimatic record of the Pliocene at Deep Sea Drilling Project Sites 519, 521, 522, and 523 (Central South Atlantic). In: Hsü, KJ; LaBrecque, JL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 73, 701-715 Weissert, Helmut J McKenzie, Judith A Wright, R Clark, Murlene W Oberhänsli, Hedi Casey, Martin 1984 application/zip https://dx.doi.org/10.1594/pangaea.811212 https://doi.pangaea.de/10.1594/PANGAEA.811212 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.2973/dsdp.proc.73.131.1984 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Drilling/drill rig Leg73 Glomar Challenger Deep Sea Drilling Project DSDP Collection article Supplementary Collection of Datasets 1984 ftdatacite https://doi.org/10.1594/pangaea.811212 https://doi.org/10.2973/dsdp.proc.73.131.1984 2021-11-05T12:55:41Z We established a composite oxygen- and carbon-isotope stratigraphy for the Pliocene in the central South Atlantic. Monospecific samples of benthic and planktonic foraminifers from pelagic sediments from DSDP Sites 519, 521, 522, and 523 were analyzed isotopically. The resulting benthic oxygen-isotope stratigraphy allowed three paleoclimatic periods in the Pliocene to be distinguished. During the early Pliocene (5.2-3.3 Ma), low-amplitude climatic changes prevailed in a world that was less glaciated than during the Pleistocene. A net increase in global ice volume is documented in a 0.5 permil positive shift in the average 18O composition of the benthic foraminifers at 3.2 Ma. The middle Pliocene (3.3-2.5 Ma) is not only characterized by a more widespread glaciation of the Southern and Northern hemispheres but also by more drastic isotopic differences between glacial and interglacial times. A minor shift in the average 18O composition of the benthic foraminifers marks the beginning of the late Pliocene-early Pleistocene climatic period (2.5-1.1 Ma). Alternating cold and warm climate is documented in both the oxygen-isotope record and in the pelagic sediments. During cold periods, sediments with a lower CaCO3 content indicate more corrosive bottom-water conditions. More negative 13C signals in the benthic foraminifers from these sediments suggest that the Antarctic Bottom Water current was intensified in glacial times. The oxygen-isotope composition of the measured planktonic foraminifers suggests that the surface water in this part of the South Atlantic remained relatively warm during the growth of the Pliocene glaciers. Article in Journal/Newspaper Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Drilling/drill rig Leg73 Glomar Challenger Deep Sea Drilling Project DSDP |
spellingShingle |
Drilling/drill rig Leg73 Glomar Challenger Deep Sea Drilling Project DSDP Weissert, Helmut J McKenzie, Judith A Wright, R Clark, Murlene W Oberhänsli, Hedi Casey, Martin Oxygen- and carbon-isotopes at DSDP Leg 73 Holes, supplement to: Weissert, Helmut J; McKenzie, Judith A; Wright, R; Clark, Murlene W; Oberhänsli, Hedi; Casey, Martin (1984): Paleoclimatic record of the Pliocene at Deep Sea Drilling Project Sites 519, 521, 522, and 523 (Central South Atlantic). In: Hsü, KJ; LaBrecque, JL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 73, 701-715 |
topic_facet |
Drilling/drill rig Leg73 Glomar Challenger Deep Sea Drilling Project DSDP |
description |
We established a composite oxygen- and carbon-isotope stratigraphy for the Pliocene in the central South Atlantic. Monospecific samples of benthic and planktonic foraminifers from pelagic sediments from DSDP Sites 519, 521, 522, and 523 were analyzed isotopically. The resulting benthic oxygen-isotope stratigraphy allowed three paleoclimatic periods in the Pliocene to be distinguished. During the early Pliocene (5.2-3.3 Ma), low-amplitude climatic changes prevailed in a world that was less glaciated than during the Pleistocene. A net increase in global ice volume is documented in a 0.5 permil positive shift in the average 18O composition of the benthic foraminifers at 3.2 Ma. The middle Pliocene (3.3-2.5 Ma) is not only characterized by a more widespread glaciation of the Southern and Northern hemispheres but also by more drastic isotopic differences between glacial and interglacial times. A minor shift in the average 18O composition of the benthic foraminifers marks the beginning of the late Pliocene-early Pleistocene climatic period (2.5-1.1 Ma). Alternating cold and warm climate is documented in both the oxygen-isotope record and in the pelagic sediments. During cold periods, sediments with a lower CaCO3 content indicate more corrosive bottom-water conditions. More negative 13C signals in the benthic foraminifers from these sediments suggest that the Antarctic Bottom Water current was intensified in glacial times. The oxygen-isotope composition of the measured planktonic foraminifers suggests that the surface water in this part of the South Atlantic remained relatively warm during the growth of the Pliocene glaciers. |
format |
Article in Journal/Newspaper |
author |
Weissert, Helmut J McKenzie, Judith A Wright, R Clark, Murlene W Oberhänsli, Hedi Casey, Martin |
author_facet |
Weissert, Helmut J McKenzie, Judith A Wright, R Clark, Murlene W Oberhänsli, Hedi Casey, Martin |
author_sort |
Weissert, Helmut J |
title |
Oxygen- and carbon-isotopes at DSDP Leg 73 Holes, supplement to: Weissert, Helmut J; McKenzie, Judith A; Wright, R; Clark, Murlene W; Oberhänsli, Hedi; Casey, Martin (1984): Paleoclimatic record of the Pliocene at Deep Sea Drilling Project Sites 519, 521, 522, and 523 (Central South Atlantic). In: Hsü, KJ; LaBrecque, JL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 73, 701-715 |
title_short |
Oxygen- and carbon-isotopes at DSDP Leg 73 Holes, supplement to: Weissert, Helmut J; McKenzie, Judith A; Wright, R; Clark, Murlene W; Oberhänsli, Hedi; Casey, Martin (1984): Paleoclimatic record of the Pliocene at Deep Sea Drilling Project Sites 519, 521, 522, and 523 (Central South Atlantic). In: Hsü, KJ; LaBrecque, JL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 73, 701-715 |
title_full |
Oxygen- and carbon-isotopes at DSDP Leg 73 Holes, supplement to: Weissert, Helmut J; McKenzie, Judith A; Wright, R; Clark, Murlene W; Oberhänsli, Hedi; Casey, Martin (1984): Paleoclimatic record of the Pliocene at Deep Sea Drilling Project Sites 519, 521, 522, and 523 (Central South Atlantic). In: Hsü, KJ; LaBrecque, JL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 73, 701-715 |
title_fullStr |
Oxygen- and carbon-isotopes at DSDP Leg 73 Holes, supplement to: Weissert, Helmut J; McKenzie, Judith A; Wright, R; Clark, Murlene W; Oberhänsli, Hedi; Casey, Martin (1984): Paleoclimatic record of the Pliocene at Deep Sea Drilling Project Sites 519, 521, 522, and 523 (Central South Atlantic). In: Hsü, KJ; LaBrecque, JL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 73, 701-715 |
title_full_unstemmed |
Oxygen- and carbon-isotopes at DSDP Leg 73 Holes, supplement to: Weissert, Helmut J; McKenzie, Judith A; Wright, R; Clark, Murlene W; Oberhänsli, Hedi; Casey, Martin (1984): Paleoclimatic record of the Pliocene at Deep Sea Drilling Project Sites 519, 521, 522, and 523 (Central South Atlantic). In: Hsü, KJ; LaBrecque, JL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 73, 701-715 |
title_sort |
oxygen- and carbon-isotopes at dsdp leg 73 holes, supplement to: weissert, helmut j; mckenzie, judith a; wright, r; clark, murlene w; oberhänsli, hedi; casey, martin (1984): paleoclimatic record of the pliocene at deep sea drilling project sites 519, 521, 522, and 523 (central south atlantic). in: hsü, kj; labrecque, jl; et al. (eds.), initial reports of the deep sea drilling project (u.s. govt. printing office), 73, 701-715 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1984 |
url |
https://dx.doi.org/10.1594/pangaea.811212 https://doi.pangaea.de/10.1594/PANGAEA.811212 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://dx.doi.org/10.2973/dsdp.proc.73.131.1984 |
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.811212 https://doi.org/10.2973/dsdp.proc.73.131.1984 |
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1766263326173560832 |