Late Cretaceous To Present Day Formation Of Oceanic Crust Between Australia, Antarctica And Pacific Illustrated By Reconstructed Free-Air Gravity And Palaeo-Bathymetry
On a long geological timescale, first-order changes in palaeo-climate, palaeo-oceanography and marine sedimentation are controlled by plate tectonics through the distribution of land masses and ocean basins (geometry and geography), the opening and closing of oceanic gateways, and changes in topogra...
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ftawi:oai:epic.awi.de:14653 2023-05-15T13:39:46+02:00 Late Cretaceous To Present Day Formation Of Oceanic Crust Between Australia, Antarctica And Pacific Illustrated By Reconstructed Free-Air Gravity And Palaeo-Bathymetry Gohl, Karsten Gaina, C. Eagles, G. 2006 https://epic.awi.de/id/eprint/14653/ https://hdl.handle.net/10013/epic.24897 unknown Gohl, K. orcid:0000-0002-9558-2116 , Gaina, C. and Eagles, G. (2006) Late Cretaceous To Present Day Formation Of Oceanic Crust Between Australia, Antarctica And Pacific Illustrated By Reconstructed Free-Air Gravity And Palaeo-Bathymetry , 2nd SCAR Open Science Conference, 12-14 Jul, Hobart, Australia. . hdl:10013/epic.24897 EPIC32nd SCAR Open Science Conference, 12-14 Jul, Hobart, Australia. Conference notRev 2006 ftawi 2021-12-24T15:30:57Z On a long geological timescale, first-order changes in palaeo-climate, palaeo-oceanography and marine sedimentation are controlled by plate tectonics through the distribution of land masses and ocean basins (geometry and geography), the opening and closing of oceanic gateways, and changes in topography both on land and at sea. The oceanic crustal age and distribution south, southeast and east of Australia illustrates the complex kinematics of major tectonic plates (Australia, Antarctica and Pacific), microplates (several blocks of the Lord Howe Rise, Campbell Plateau and Chatham Rise), and the intervening triple junctions that led to the formation of ridge jumps, long fracture zones and transform faults, and trenches. Several up-to-date models for the evolution of individual oceanic basins in this region have been merged with a South Pacific high-resolution tectonic model in order to document a detailed tectonic history of this region.Densely spaced isochrons (1 million years) are derived from the kinematic model and refined using satellite-derived free-air gravity anomalies and bathymetry, and magnetic anomalies from ship track data. The isochrons are used to construct polygons that depict the amount of oceanic lithosphere attached to the active tectonic plates at a certain geological time. Palaeo-age and palaeo-bathymetric grids are calculated based on the new dense set of isochrons. We present animated reconstructions and use them to highlight the importance of bathymetric features and the distribution of land and sea in the opening of the Tasman gateway and subsequent development of the Antarctic Circumpolar Current (ACC). Conference Object Antarc* Antarctic Antarctica Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic The Antarctic Pacific Campbell Plateau ENVELOPE(171.000,171.000,-50.667,-50.667) |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
On a long geological timescale, first-order changes in palaeo-climate, palaeo-oceanography and marine sedimentation are controlled by plate tectonics through the distribution of land masses and ocean basins (geometry and geography), the opening and closing of oceanic gateways, and changes in topography both on land and at sea. The oceanic crustal age and distribution south, southeast and east of Australia illustrates the complex kinematics of major tectonic plates (Australia, Antarctica and Pacific), microplates (several blocks of the Lord Howe Rise, Campbell Plateau and Chatham Rise), and the intervening triple junctions that led to the formation of ridge jumps, long fracture zones and transform faults, and trenches. Several up-to-date models for the evolution of individual oceanic basins in this region have been merged with a South Pacific high-resolution tectonic model in order to document a detailed tectonic history of this region.Densely spaced isochrons (1 million years) are derived from the kinematic model and refined using satellite-derived free-air gravity anomalies and bathymetry, and magnetic anomalies from ship track data. The isochrons are used to construct polygons that depict the amount of oceanic lithosphere attached to the active tectonic plates at a certain geological time. Palaeo-age and palaeo-bathymetric grids are calculated based on the new dense set of isochrons. We present animated reconstructions and use them to highlight the importance of bathymetric features and the distribution of land and sea in the opening of the Tasman gateway and subsequent development of the Antarctic Circumpolar Current (ACC). |
format |
Conference Object |
author |
Gohl, Karsten Gaina, C. Eagles, G. |
spellingShingle |
Gohl, Karsten Gaina, C. Eagles, G. Late Cretaceous To Present Day Formation Of Oceanic Crust Between Australia, Antarctica And Pacific Illustrated By Reconstructed Free-Air Gravity And Palaeo-Bathymetry |
author_facet |
Gohl, Karsten Gaina, C. Eagles, G. |
author_sort |
Gohl, Karsten |
title |
Late Cretaceous To Present Day Formation Of Oceanic Crust Between Australia, Antarctica And Pacific Illustrated By Reconstructed Free-Air Gravity And Palaeo-Bathymetry |
title_short |
Late Cretaceous To Present Day Formation Of Oceanic Crust Between Australia, Antarctica And Pacific Illustrated By Reconstructed Free-Air Gravity And Palaeo-Bathymetry |
title_full |
Late Cretaceous To Present Day Formation Of Oceanic Crust Between Australia, Antarctica And Pacific Illustrated By Reconstructed Free-Air Gravity And Palaeo-Bathymetry |
title_fullStr |
Late Cretaceous To Present Day Formation Of Oceanic Crust Between Australia, Antarctica And Pacific Illustrated By Reconstructed Free-Air Gravity And Palaeo-Bathymetry |
title_full_unstemmed |
Late Cretaceous To Present Day Formation Of Oceanic Crust Between Australia, Antarctica And Pacific Illustrated By Reconstructed Free-Air Gravity And Palaeo-Bathymetry |
title_sort |
late cretaceous to present day formation of oceanic crust between australia, antarctica and pacific illustrated by reconstructed free-air gravity and palaeo-bathymetry |
publishDate |
2006 |
url |
https://epic.awi.de/id/eprint/14653/ https://hdl.handle.net/10013/epic.24897 |
long_lat |
ENVELOPE(171.000,171.000,-50.667,-50.667) |
geographic |
Antarctic The Antarctic Pacific Campbell Plateau |
geographic_facet |
Antarctic The Antarctic Pacific Campbell Plateau |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
EPIC32nd SCAR Open Science Conference, 12-14 Jul, Hobart, Australia. |
op_relation |
Gohl, K. orcid:0000-0002-9558-2116 , Gaina, C. and Eagles, G. (2006) Late Cretaceous To Present Day Formation Of Oceanic Crust Between Australia, Antarctica And Pacific Illustrated By Reconstructed Free-Air Gravity And Palaeo-Bathymetry , 2nd SCAR Open Science Conference, 12-14 Jul, Hobart, Australia. . hdl:10013/epic.24897 |
_version_ |
1766123724769067008 |