Seismic stratigraphy of the eastern continental shelf of the Wedell Sea, Antarctica
Interpretation of a 1 miles of seismic data, covering the eastern part of the Weddell Sea continental shelf, in Antarctica, reveals a passive margin environment adjacent to the East Antarctic craton. Two major seismic stratigraphic sequences bounded by regional unconformities onlap a highly eroded a...
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ftriceuniv:oai:scholarship.rice.edu:1911/103874 2023-05-15T13:44:56+02:00 Seismic stratigraphy of the eastern continental shelf of the Wedell Sea, Antarctica Roqueplo, Christine M. Clark, Howard C. Anderson, John B.;Wegner, R. 1983 203 pp reformatted digital application/pdf https://hdl.handle.net/1911/103874 eng eng Roqueplo, Christine M. "Seismic stratigraphy of the eastern continental shelf of the Wedell Sea, Antarctica." (1983) Master’s Thesis, Rice University. https://hdl.handle.net/1911/103874 . https://hdl.handle.net/1911/103874 RICE1500 Thesis Geol. 1983 Roqueplo Thesis Text 1983 ftriceuniv 2022-08-09T20:34:32Z Interpretation of a 1 miles of seismic data, covering the eastern part of the Weddell Sea continental shelf, in Antarctica, reveals a passive margin environment adjacent to the East Antarctic craton. Two major seismic stratigraphic sequences bounded by regional unconformities onlap a highly eroded and possibly faulted acoustic basement. The basement terranes which exhibit high magnetic susceptibilities were tentatively correlated with Mesozoic igneous rocks identified in the Transantarctic Mountains. The older sequence is formed of nearshore deposits which do not contradict the presence of ice on the mainland. The younger sequence, however, exhibits the seismic response expected from glacially derived sediments. The angular unconformity separating both units was probably related to a major (late Oligocene?) drop of sea level, while the erosional event which followed the deposition of the glacial series corresponds to a peak in glacial activity (Pliocene?). Structural framework of the area can only be approached through broad scale studies involving the complex relationships between the East and West Antarctic subcontinents. Thesis Antarc* Antarctic Antarctica Weddell Sea Rice University: Digital Scholarship Archive Antarctic Transantarctic Mountains Weddell Weddell Sea |
institution |
Open Polar |
collection |
Rice University: Digital Scholarship Archive |
op_collection_id |
ftriceuniv |
language |
English |
description |
Interpretation of a 1 miles of seismic data, covering the eastern part of the Weddell Sea continental shelf, in Antarctica, reveals a passive margin environment adjacent to the East Antarctic craton. Two major seismic stratigraphic sequences bounded by regional unconformities onlap a highly eroded and possibly faulted acoustic basement. The basement terranes which exhibit high magnetic susceptibilities were tentatively correlated with Mesozoic igneous rocks identified in the Transantarctic Mountains. The older sequence is formed of nearshore deposits which do not contradict the presence of ice on the mainland. The younger sequence, however, exhibits the seismic response expected from glacially derived sediments. The angular unconformity separating both units was probably related to a major (late Oligocene?) drop of sea level, while the erosional event which followed the deposition of the glacial series corresponds to a peak in glacial activity (Pliocene?). Structural framework of the area can only be approached through broad scale studies involving the complex relationships between the East and West Antarctic subcontinents. |
author2 |
Clark, Howard C. Anderson, John B.;Wegner, R. |
format |
Thesis |
author |
Roqueplo, Christine M. |
spellingShingle |
Roqueplo, Christine M. Seismic stratigraphy of the eastern continental shelf of the Wedell Sea, Antarctica |
author_facet |
Roqueplo, Christine M. |
author_sort |
Roqueplo, Christine M. |
title |
Seismic stratigraphy of the eastern continental shelf of the Wedell Sea, Antarctica |
title_short |
Seismic stratigraphy of the eastern continental shelf of the Wedell Sea, Antarctica |
title_full |
Seismic stratigraphy of the eastern continental shelf of the Wedell Sea, Antarctica |
title_fullStr |
Seismic stratigraphy of the eastern continental shelf of the Wedell Sea, Antarctica |
title_full_unstemmed |
Seismic stratigraphy of the eastern continental shelf of the Wedell Sea, Antarctica |
title_sort |
seismic stratigraphy of the eastern continental shelf of the wedell sea, antarctica |
publishDate |
1983 |
url |
https://hdl.handle.net/1911/103874 |
geographic |
Antarctic Transantarctic Mountains Weddell Weddell Sea |
geographic_facet |
Antarctic Transantarctic Mountains Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Weddell Sea |
op_relation |
Roqueplo, Christine M. "Seismic stratigraphy of the eastern continental shelf of the Wedell Sea, Antarctica." (1983) Master’s Thesis, Rice University. https://hdl.handle.net/1911/103874 . https://hdl.handle.net/1911/103874 RICE1500 Thesis Geol. 1983 Roqueplo |
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