Interglacial collapse of crary trough-mouth fan, Weddel Sea, Antarctica: Implications for Antarctic glacial history
In this study, we investigate the stratigraphy of a trough-mouth fan in the Weddell Sea to determine possible relationships between basin-floor stratigraphy and glaciation on Antarctica. Seismic data from the basin floor show a deep, broad, and elongate erosional channel filled by thick chaotic-faci...
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Language: | English |
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ftvliz:oai:oma.vliz.be:13348 2023-05-15T13:57:19+02:00 Interglacial collapse of crary trough-mouth fan, Weddel Sea, Antarctica: Implications for Antarctic glacial history Bart, P.J. De Batist, M. Jokat, W. 1999 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=13348 en eng info:eu-repo/semantics/altIdentifier/wos/000083782600011 info:eu-repo/semantics/altIdentifier/doi/oi.org/10.2110/jsr.69.1276 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=13348 info:eu-repo/semantics/restrictedAccess %3Ci%3EJ.+Sediment.+Res.+%28B+Stratigr.+Global+Stud.%29+69%286%29%3C%2Fi%3E%3A+1276-1289.+%3Ca+href%3D%22http%3A%2F%2Fdx.doi.org%2F10.2110%2Fjsr.69.1276%22+target%3D%22_blank%22%3Ehttp%3A%2F%2Fdx.doi.org%2F10.2110%2Fjsr.69.1276%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1999 ftvliz https://doi.org/10.2110/jsr.69.1276 2022-05-01T08:21:19Z In this study, we investigate the stratigraphy of a trough-mouth fan in the Weddell Sea to determine possible relationships between basin-floor stratigraphy and glaciation on Antarctica. Seismic data from the basin floor show a deep, broad, and elongate erosional channel filled by thick chaotic-facies deposits, basin-floor fans, and channel-levee deposits. From seismic-stratigraphy analysis of basin-floor stratigraphy, we infer that this channel formed by large-volume mass wasting sourced from poorly sorted glacial sediments from Crary Trough-Mouth Fan and Dronning Maud Land slopes. Correlation to ODP Leg 113 Site 693 suggests that the mass wasting of the slopes occurred in the early Pliocene. We surmise that collapse occurred during an early Pliocene interglacial and was related to major drawdown of the antarctic ice volume. Collapse was probably triggered by rebound and relative sea-level fall, a mathematically predicted geoidal effect related to antarctic ice-volume reduction. The record of this major ice-volume reduction is not manifest in the trough-mouth fan but rather is manifest in the basin-floor stratigraphy as a major backfilled erosional channel, which extends far beyond the trough-mouth fan. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land Weddel Sea Weddell Sea Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Antarctic Dronning Maud Land The Antarctic Weddell Weddell Sea Journal of Sedimentary Research 69 6 1276 1289 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
In this study, we investigate the stratigraphy of a trough-mouth fan in the Weddell Sea to determine possible relationships between basin-floor stratigraphy and glaciation on Antarctica. Seismic data from the basin floor show a deep, broad, and elongate erosional channel filled by thick chaotic-facies deposits, basin-floor fans, and channel-levee deposits. From seismic-stratigraphy analysis of basin-floor stratigraphy, we infer that this channel formed by large-volume mass wasting sourced from poorly sorted glacial sediments from Crary Trough-Mouth Fan and Dronning Maud Land slopes. Correlation to ODP Leg 113 Site 693 suggests that the mass wasting of the slopes occurred in the early Pliocene. We surmise that collapse occurred during an early Pliocene interglacial and was related to major drawdown of the antarctic ice volume. Collapse was probably triggered by rebound and relative sea-level fall, a mathematically predicted geoidal effect related to antarctic ice-volume reduction. The record of this major ice-volume reduction is not manifest in the trough-mouth fan but rather is manifest in the basin-floor stratigraphy as a major backfilled erosional channel, which extends far beyond the trough-mouth fan. |
format |
Article in Journal/Newspaper |
author |
Bart, P.J. De Batist, M. Jokat, W. |
spellingShingle |
Bart, P.J. De Batist, M. Jokat, W. Interglacial collapse of crary trough-mouth fan, Weddel Sea, Antarctica: Implications for Antarctic glacial history |
author_facet |
Bart, P.J. De Batist, M. Jokat, W. |
author_sort |
Bart, P.J. |
title |
Interglacial collapse of crary trough-mouth fan, Weddel Sea, Antarctica: Implications for Antarctic glacial history |
title_short |
Interglacial collapse of crary trough-mouth fan, Weddel Sea, Antarctica: Implications for Antarctic glacial history |
title_full |
Interglacial collapse of crary trough-mouth fan, Weddel Sea, Antarctica: Implications for Antarctic glacial history |
title_fullStr |
Interglacial collapse of crary trough-mouth fan, Weddel Sea, Antarctica: Implications for Antarctic glacial history |
title_full_unstemmed |
Interglacial collapse of crary trough-mouth fan, Weddel Sea, Antarctica: Implications for Antarctic glacial history |
title_sort |
interglacial collapse of crary trough-mouth fan, weddel sea, antarctica: implications for antarctic glacial history |
publishDate |
1999 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=13348 |
geographic |
Antarctic Dronning Maud Land The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Dronning Maud Land The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land Weddel Sea Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land Weddel Sea Weddell Sea |
op_source |
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op_relation |
info:eu-repo/semantics/altIdentifier/wos/000083782600011 info:eu-repo/semantics/altIdentifier/doi/oi.org/10.2110/jsr.69.1276 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=13348 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.2110/jsr.69.1276 |
container_title |
Journal of Sedimentary Research |
container_volume |
69 |
container_issue |
6 |
container_start_page |
1276 |
op_container_end_page |
1289 |
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1766264932174659584 |