Tectonic, Oceanographic, and Climatic Controls on the Cretaceous‐Cenozoic Sedimentary Record of the Australian‐Antarctic Basin
Understanding the patterns and characteristics of sedimentary deposits on the conjugate Australian‐Antarctic margins is critical to reveal the Cretaceous‐Cenozoic tectonic, oceanographic, and climatic conditions in the basin. However, unraveling its evolution has remained difficult due to the differ...
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Online Access: | https://epic.awi.de/id/eprint/50393/ https://hdl.handle.net/10013/epic.784b10a1-4153-49a1-b90a-f914b6a5b3fc |
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ftawi:oai:epic.awi.de:50393 2023-05-15T13:45:21+02:00 Tectonic, Oceanographic, and Climatic Controls on the Cretaceous‐Cenozoic Sedimentary Record of the Australian‐Antarctic Basin Sauermilch, Isabel Whittaker, Joanne M. Bijl, Peter K Totterdell, J.M. Jokat, Wilfried 2019-08-29 https://epic.awi.de/id/eprint/50393/ https://hdl.handle.net/10013/epic.784b10a1-4153-49a1-b90a-f914b6a5b3fc unknown Wiley Sauermilch, I. , Whittaker, J. M. , Bijl, P. K. , Totterdell, J. and Jokat, W. orcid:0000-0002-7793-5854 (2019) Tectonic, Oceanographic, and Climatic Controls on the Cretaceous‐Cenozoic Sedimentary Record of the Australian‐Antarctic Basin , Journal of Geophysical Research-Solid Earth, 124 , pp. 7699-7724 . doi:10.1029/2018JB016683 <https://doi.org/10.1029/2018JB016683> , hdl:10013/epic.784b10a1-4153-49a1-b90a-f914b6a5b3fc EPIC3Journal of Geophysical Research-Solid Earth, Wiley, 124, pp. 7699-7724, ISSN: 0148-0227 Article isiRev 2019 ftawi https://doi.org/10.1029/2018JB016683 2021-12-24T15:44:58Z Understanding the patterns and characteristics of sedimentary deposits on the conjugate Australian‐Antarctic margins is critical to reveal the Cretaceous‐Cenozoic tectonic, oceanographic, and climatic conditions in the basin. However, unraveling its evolution has remained difficult due to the different seismic stratigraphic interpretations on each margin and sparse drill sites. Here, for the first time, we collate all available seismic reflection profiles on both margins and use newly available offshore drilling data to develop a consistent seismic stratigraphic framework across the Australian‐Antarctic basins. We find sedimentation patterns similar in structure and thickness, prior to the onset of Antarctic glaciation, enabling the basinwide correlation of four major sedimentary units and their depositional history. We interpret that during the warm and humid Late Cretaceous (~83–65 Ma), large onshore river systems on both Australia and Antarctica resulted in deltaic sediment deposition offshore. We interpret that the onset of clockwise bottom currents during the early Paleogene (~58–48 Ma) formed prominent sediment drift deposits along both continental rises. We suggest that these currents strengthened and progressed farther east through the Eocene. Coevally, global cooling (<48 Ma) and progressive aridification led to a large‐scale decrease in sediment input from both continents. Two major Eocene hiatuses recovered by the Integrated Ocean Discovery Program site U1356A at the Antarctic continental slope likely formed during this preglacial phase of low sedimentation and strong bottom currents. Our results can be used to constrain future paleo‐oceanographic modeling of this region and aid the understanding of the oceanographic changes accompanying the transition from a greenhouse to icehouse world. Article in Journal/Newspaper Antarc* Antarctic Antarctica Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Australian Antarctic Basin ENVELOPE(120.000,120.000,-60.000,-60.000) Australian-Antarctic Basin ENVELOPE(134.115,134.115,-58.800,-58.800) The Antarctic Journal of Geophysical Research: Solid Earth 124 8 7699 7724 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Understanding the patterns and characteristics of sedimentary deposits on the conjugate Australian‐Antarctic margins is critical to reveal the Cretaceous‐Cenozoic tectonic, oceanographic, and climatic conditions in the basin. However, unraveling its evolution has remained difficult due to the different seismic stratigraphic interpretations on each margin and sparse drill sites. Here, for the first time, we collate all available seismic reflection profiles on both margins and use newly available offshore drilling data to develop a consistent seismic stratigraphic framework across the Australian‐Antarctic basins. We find sedimentation patterns similar in structure and thickness, prior to the onset of Antarctic glaciation, enabling the basinwide correlation of four major sedimentary units and their depositional history. We interpret that during the warm and humid Late Cretaceous (~83–65 Ma), large onshore river systems on both Australia and Antarctica resulted in deltaic sediment deposition offshore. We interpret that the onset of clockwise bottom currents during the early Paleogene (~58–48 Ma) formed prominent sediment drift deposits along both continental rises. We suggest that these currents strengthened and progressed farther east through the Eocene. Coevally, global cooling (<48 Ma) and progressive aridification led to a large‐scale decrease in sediment input from both continents. Two major Eocene hiatuses recovered by the Integrated Ocean Discovery Program site U1356A at the Antarctic continental slope likely formed during this preglacial phase of low sedimentation and strong bottom currents. Our results can be used to constrain future paleo‐oceanographic modeling of this region and aid the understanding of the oceanographic changes accompanying the transition from a greenhouse to icehouse world. |
format |
Article in Journal/Newspaper |
author |
Sauermilch, Isabel Whittaker, Joanne M. Bijl, Peter K Totterdell, J.M. Jokat, Wilfried |
spellingShingle |
Sauermilch, Isabel Whittaker, Joanne M. Bijl, Peter K Totterdell, J.M. Jokat, Wilfried Tectonic, Oceanographic, and Climatic Controls on the Cretaceous‐Cenozoic Sedimentary Record of the Australian‐Antarctic Basin |
author_facet |
Sauermilch, Isabel Whittaker, Joanne M. Bijl, Peter K Totterdell, J.M. Jokat, Wilfried |
author_sort |
Sauermilch, Isabel |
title |
Tectonic, Oceanographic, and Climatic Controls on the Cretaceous‐Cenozoic Sedimentary Record of the Australian‐Antarctic Basin |
title_short |
Tectonic, Oceanographic, and Climatic Controls on the Cretaceous‐Cenozoic Sedimentary Record of the Australian‐Antarctic Basin |
title_full |
Tectonic, Oceanographic, and Climatic Controls on the Cretaceous‐Cenozoic Sedimentary Record of the Australian‐Antarctic Basin |
title_fullStr |
Tectonic, Oceanographic, and Climatic Controls on the Cretaceous‐Cenozoic Sedimentary Record of the Australian‐Antarctic Basin |
title_full_unstemmed |
Tectonic, Oceanographic, and Climatic Controls on the Cretaceous‐Cenozoic Sedimentary Record of the Australian‐Antarctic Basin |
title_sort |
tectonic, oceanographic, and climatic controls on the cretaceous‐cenozoic sedimentary record of the australian‐antarctic basin |
publisher |
Wiley |
publishDate |
2019 |
url |
https://epic.awi.de/id/eprint/50393/ https://hdl.handle.net/10013/epic.784b10a1-4153-49a1-b90a-f914b6a5b3fc |
long_lat |
ENVELOPE(120.000,120.000,-60.000,-60.000) ENVELOPE(134.115,134.115,-58.800,-58.800) |
geographic |
Antarctic Australian Antarctic Basin Australian-Antarctic Basin The Antarctic |
geographic_facet |
Antarctic Australian Antarctic Basin Australian-Antarctic Basin The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
EPIC3Journal of Geophysical Research-Solid Earth, Wiley, 124, pp. 7699-7724, ISSN: 0148-0227 |
op_relation |
Sauermilch, I. , Whittaker, J. M. , Bijl, P. K. , Totterdell, J. and Jokat, W. orcid:0000-0002-7793-5854 (2019) Tectonic, Oceanographic, and Climatic Controls on the Cretaceous‐Cenozoic Sedimentary Record of the Australian‐Antarctic Basin , Journal of Geophysical Research-Solid Earth, 124 , pp. 7699-7724 . doi:10.1029/2018JB016683 <https://doi.org/10.1029/2018JB016683> , hdl:10013/epic.784b10a1-4153-49a1-b90a-f914b6a5b3fc |
op_doi |
https://doi.org/10.1029/2018JB016683 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
124 |
container_issue |
8 |
container_start_page |
7699 |
op_container_end_page |
7724 |
_version_ |
1766221768672935936 |