Tectonic and oceanographic process interactions archived in the Late Cretaceous to Present deep-marine stratigraphy on the Exmouth Plateau, offshore NW Australia
Deep-marine deposits provide a valuable archive of process interactions between sediment gravity flows, pelagic sedimentation, and thermo-haline bottom-currents. Stratigraphic successions can also record plate-scale tectonic processes (e.g. continental breakup and shortening) that impact long-term o...
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Online Access: | http://hdl.handle.net/10044/1/66290 https://doi.org/10.1111/bre.12328 |
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ftimperialcol:oai:spiral.imperial.ac.uk:10044/1/66290 2023-05-15T14:01:35+02:00 Tectonic and oceanographic process interactions archived in the Late Cretaceous to Present deep-marine stratigraphy on the Exmouth Plateau, offshore NW Australia Nugraha, H Jackson, C Johnson, H Hodgson, D Reeve, M 2018-11-06 http://hdl.handle.net/10044/1/66290 https://doi.org/10.1111/bre.12328 unknown Wiley Basin Research © 2018 The Authors. Basin Research © 2018 International Association of Sedimentologists and European Association of Geoscientists and Engineers and John Wiley & Sons Ltd. This is the pre-peer reviewed version of the following article, which has been published in final form at https://onlinelibrary.wiley.com/doi/full/10.1111/bre.12328 430 405 Science & Technology Physical Sciences Geosciences Multidisciplinary Geology bottom current contourites deep marine Exmouth Plateau MTCs NW Australia palaeo-oceanography seismic reflection tectonics and sedimentation MASS-TRANSPORT COMPLEXES CURRENT-CONTROLLED SEDIMENTATION CONTOURITE DEPOSITIONAL SYSTEM GIANT SUBMARINE LANDSLIDE SANTA-MONICA BASIN NORTH-WEST SHELF ANTARCTIC PENINSULA CONTINENTAL-MARGIN BOTTOM CURRENTS LEEUWIN CURRENT 04 Earth Sciences Journal Article 2018 ftimperialcol https://doi.org/10.1111/bre.12328 2019-11-14T23:39:18Z Deep-marine deposits provide a valuable archive of process interactions between sediment gravity flows, pelagic sedimentation, and thermo-haline bottom-currents. Stratigraphic successions can also record plate-scale tectonic processes (e.g. continental breakup and shortening) that impact long-term ocean circulation patterns, including changes in climate and biodiversity. One such setting is the Exmouth Plateau, offshore NW Australia, which has been a relatively stable, fine-grained carbonate-dominated continental margin from the Late Cretaceous to Present. We combine extensive 2D (~40,000 km) and 3D (3,627 km2) seismic reflection data with lithologic and biostratigraphic information from wells to reconstruct the tectonic and oceanographic evolution of this margin. We identified three large-scale seismic units (SUs): (1) SU-1 (Late Cretaceous) – 500 m-thick, and characterised by NE-SW-trending, slope-normal elongate depocentres (c. 200 km long and 70 km wide), with erosional surfaces at their bases and tops, which are interpreted as the result of contour-parallel bottom-currents, coeval with the onset of opening of the Southern Ocean; (2) SU-2 (Palaeocene – Late Miocene) – 800 m-thick and characterised by: (i) very large (amplitude, c. 40 m and wavelength, c. 3 km), SW-migrating, NW-SE-trending sediment waves, (ii) large (4 km-wide, 100 m-deep), NE-trending scours that flank the sediment waves, and (iii) NW-trending, 4 km wide and 80 m deep turbidite channel, infilled by NE-dipping reflectors, which together may reflect an intensification of NE-flowing bottom currents during a relative sea-level fall following the establishment of circumpolar-ocean current around Antarctica; and (3) SU-3 (Late Miocene – Present) – 1000 m-thick and is dominated by large (up to 100 km3) mass-transport complexes (MTCs) derived from the continental margin (to the east) and the Exmouth Plateau Arch (to the west), and accumulated mainly in the adjacent Kangaroo Syncline. This change in depositional style may be linked to tectonically-induced seabed tilting and folding caused by collision and subduction along the northern margin of the Australian plate. Hence, the stratigraphic record of the Exmouth Plateau provides a rich archive of plate-scale regional geological events occurring along the distant southern (2000 km away) and northern (1500 km away) margins of the Australian plate. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean Imperial College London: Spiral Antarctic Antarctic Peninsula Southern Ocean Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) Basin Research 31 3 405 430 |
institution |
Open Polar |
collection |
Imperial College London: Spiral |
op_collection_id |
ftimperialcol |
language |
unknown |
topic |
Science & Technology Physical Sciences Geosciences Multidisciplinary Geology bottom current contourites deep marine Exmouth Plateau MTCs NW Australia palaeo-oceanography seismic reflection tectonics and sedimentation MASS-TRANSPORT COMPLEXES CURRENT-CONTROLLED SEDIMENTATION CONTOURITE DEPOSITIONAL SYSTEM GIANT SUBMARINE LANDSLIDE SANTA-MONICA BASIN NORTH-WEST SHELF ANTARCTIC PENINSULA CONTINENTAL-MARGIN BOTTOM CURRENTS LEEUWIN CURRENT 04 Earth Sciences |
spellingShingle |
Science & Technology Physical Sciences Geosciences Multidisciplinary Geology bottom current contourites deep marine Exmouth Plateau MTCs NW Australia palaeo-oceanography seismic reflection tectonics and sedimentation MASS-TRANSPORT COMPLEXES CURRENT-CONTROLLED SEDIMENTATION CONTOURITE DEPOSITIONAL SYSTEM GIANT SUBMARINE LANDSLIDE SANTA-MONICA BASIN NORTH-WEST SHELF ANTARCTIC PENINSULA CONTINENTAL-MARGIN BOTTOM CURRENTS LEEUWIN CURRENT 04 Earth Sciences Nugraha, H Jackson, C Johnson, H Hodgson, D Reeve, M Tectonic and oceanographic process interactions archived in the Late Cretaceous to Present deep-marine stratigraphy on the Exmouth Plateau, offshore NW Australia |
topic_facet |
Science & Technology Physical Sciences Geosciences Multidisciplinary Geology bottom current contourites deep marine Exmouth Plateau MTCs NW Australia palaeo-oceanography seismic reflection tectonics and sedimentation MASS-TRANSPORT COMPLEXES CURRENT-CONTROLLED SEDIMENTATION CONTOURITE DEPOSITIONAL SYSTEM GIANT SUBMARINE LANDSLIDE SANTA-MONICA BASIN NORTH-WEST SHELF ANTARCTIC PENINSULA CONTINENTAL-MARGIN BOTTOM CURRENTS LEEUWIN CURRENT 04 Earth Sciences |
description |
Deep-marine deposits provide a valuable archive of process interactions between sediment gravity flows, pelagic sedimentation, and thermo-haline bottom-currents. Stratigraphic successions can also record plate-scale tectonic processes (e.g. continental breakup and shortening) that impact long-term ocean circulation patterns, including changes in climate and biodiversity. One such setting is the Exmouth Plateau, offshore NW Australia, which has been a relatively stable, fine-grained carbonate-dominated continental margin from the Late Cretaceous to Present. We combine extensive 2D (~40,000 km) and 3D (3,627 km2) seismic reflection data with lithologic and biostratigraphic information from wells to reconstruct the tectonic and oceanographic evolution of this margin. We identified three large-scale seismic units (SUs): (1) SU-1 (Late Cretaceous) – 500 m-thick, and characterised by NE-SW-trending, slope-normal elongate depocentres (c. 200 km long and 70 km wide), with erosional surfaces at their bases and tops, which are interpreted as the result of contour-parallel bottom-currents, coeval with the onset of opening of the Southern Ocean; (2) SU-2 (Palaeocene – Late Miocene) – 800 m-thick and characterised by: (i) very large (amplitude, c. 40 m and wavelength, c. 3 km), SW-migrating, NW-SE-trending sediment waves, (ii) large (4 km-wide, 100 m-deep), NE-trending scours that flank the sediment waves, and (iii) NW-trending, 4 km wide and 80 m deep turbidite channel, infilled by NE-dipping reflectors, which together may reflect an intensification of NE-flowing bottom currents during a relative sea-level fall following the establishment of circumpolar-ocean current around Antarctica; and (3) SU-3 (Late Miocene – Present) – 1000 m-thick and is dominated by large (up to 100 km3) mass-transport complexes (MTCs) derived from the continental margin (to the east) and the Exmouth Plateau Arch (to the west), and accumulated mainly in the adjacent Kangaroo Syncline. This change in depositional style may be linked to tectonically-induced seabed tilting and folding caused by collision and subduction along the northern margin of the Australian plate. Hence, the stratigraphic record of the Exmouth Plateau provides a rich archive of plate-scale regional geological events occurring along the distant southern (2000 km away) and northern (1500 km away) margins of the Australian plate. |
format |
Article in Journal/Newspaper |
author |
Nugraha, H Jackson, C Johnson, H Hodgson, D Reeve, M |
author_facet |
Nugraha, H Jackson, C Johnson, H Hodgson, D Reeve, M |
author_sort |
Nugraha, H |
title |
Tectonic and oceanographic process interactions archived in the Late Cretaceous to Present deep-marine stratigraphy on the Exmouth Plateau, offshore NW Australia |
title_short |
Tectonic and oceanographic process interactions archived in the Late Cretaceous to Present deep-marine stratigraphy on the Exmouth Plateau, offshore NW Australia |
title_full |
Tectonic and oceanographic process interactions archived in the Late Cretaceous to Present deep-marine stratigraphy on the Exmouth Plateau, offshore NW Australia |
title_fullStr |
Tectonic and oceanographic process interactions archived in the Late Cretaceous to Present deep-marine stratigraphy on the Exmouth Plateau, offshore NW Australia |
title_full_unstemmed |
Tectonic and oceanographic process interactions archived in the Late Cretaceous to Present deep-marine stratigraphy on the Exmouth Plateau, offshore NW Australia |
title_sort |
tectonic and oceanographic process interactions archived in the late cretaceous to present deep-marine stratigraphy on the exmouth plateau, offshore nw australia |
publisher |
Wiley |
publishDate |
2018 |
url |
http://hdl.handle.net/10044/1/66290 https://doi.org/10.1111/bre.12328 |
long_lat |
ENVELOPE(-54.065,-54.065,49.700,49.700) |
geographic |
Antarctic Antarctic Peninsula Southern Ocean Tilting |
geographic_facet |
Antarctic Antarctic Peninsula Southern Ocean Tilting |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean |
op_source |
430 405 |
op_relation |
Basin Research |
op_rights |
© 2018 The Authors. Basin Research © 2018 International Association of Sedimentologists and European Association of Geoscientists and Engineers and John Wiley & Sons Ltd. This is the pre-peer reviewed version of the following article, which has been published in final form at https://onlinelibrary.wiley.com/doi/full/10.1111/bre.12328 |
op_doi |
https://doi.org/10.1111/bre.12328 |
container_title |
Basin Research |
container_volume |
31 |
container_issue |
3 |
container_start_page |
405 |
op_container_end_page |
430 |
_version_ |
1766271515172536320 |