Insights into the style and geodynamic implications of circum-Antarctic passive continental margins and their continent-ocean transitions
Antarctica was a center-piece of the Gondwana supercontinent. About 85 percent of Antarcticas 10000 km long continental margins are of a rifted divergent type, and about 1200 km have been converted from a subduction-type to a passive margin after ridge-trench collision along the Pacific side of the...
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ftawi:oai:epic.awi.de:18664 2023-05-15T13:39:47+02:00 Insights into the style and geodynamic implications of circum-Antarctic passive continental margins and their continent-ocean transitions Gohl, Karsten 2008 https://epic.awi.de/id/eprint/18664/ https://hdl.handle.net/10013/epic.30308 unknown Gohl, K. orcid:0000-0002-9558-2116 (2008) Insights into the style and geodynamic implications of circum-Antarctic passive continental margins and their continent-ocean transitions , 13th International Symposium on Deep Seismic Profling of the Continents and their Margins (SEISMIX 2008); 8-13 June 2008, Saariselkä, Finland. . hdl:10013/epic.30308 EPIC313th International Symposium on Deep Seismic Profling of the Continents and their Margins (SEISMIX 2008); 8-13 June 2008, Saariselkä, Finland. Conference notRev 2008 ftawi 2021-12-24T15:32:39Z Antarctica was a center-piece of the Gondwana supercontinent. About 85 percent of Antarcticas 10000 km long continental margins are of a rifted divergent type, and about 1200 km have been converted from a subduction-type to a passive margin after ridge-trench collision along the Pacific side of the Antarctic Peninsula. The separation of South America, Africa, India, Australia and New Zealand from Antarctica and the creation of a continuous Southern Ocean began in the Jurassic and continued until the mid Tertiary. In recent years, the amount of geophysical data along the continental margin of Antarctica has increased substantially, which allows to differentiate the crustal characteristics of its continent-ocean boundaries and transitional zones (COB/COT). The data and geodynamic modelling indicate that the cause, style and process of breakup and separation are highly variable along the Antarctic margin. A circum-Antarctic map summarizes the crustal styles of the margin and the location and geophysical characteristics of the COT. Definitions and identifications of the COT and an understanding of its process of formation have consequences for plate-kinematic reconstructions, geodynamic syntheses and isostatic considerations. Conference Object Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Antarctic Peninsula New Zealand Pacific Southern Ocean The Antarctic |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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description |
Antarctica was a center-piece of the Gondwana supercontinent. About 85 percent of Antarcticas 10000 km long continental margins are of a rifted divergent type, and about 1200 km have been converted from a subduction-type to a passive margin after ridge-trench collision along the Pacific side of the Antarctic Peninsula. The separation of South America, Africa, India, Australia and New Zealand from Antarctica and the creation of a continuous Southern Ocean began in the Jurassic and continued until the mid Tertiary. In recent years, the amount of geophysical data along the continental margin of Antarctica has increased substantially, which allows to differentiate the crustal characteristics of its continent-ocean boundaries and transitional zones (COB/COT). The data and geodynamic modelling indicate that the cause, style and process of breakup and separation are highly variable along the Antarctic margin. A circum-Antarctic map summarizes the crustal styles of the margin and the location and geophysical characteristics of the COT. Definitions and identifications of the COT and an understanding of its process of formation have consequences for plate-kinematic reconstructions, geodynamic syntheses and isostatic considerations. |
format |
Conference Object |
author |
Gohl, Karsten |
spellingShingle |
Gohl, Karsten Insights into the style and geodynamic implications of circum-Antarctic passive continental margins and their continent-ocean transitions |
author_facet |
Gohl, Karsten |
author_sort |
Gohl, Karsten |
title |
Insights into the style and geodynamic implications of circum-Antarctic passive continental margins and their continent-ocean transitions |
title_short |
Insights into the style and geodynamic implications of circum-Antarctic passive continental margins and their continent-ocean transitions |
title_full |
Insights into the style and geodynamic implications of circum-Antarctic passive continental margins and their continent-ocean transitions |
title_fullStr |
Insights into the style and geodynamic implications of circum-Antarctic passive continental margins and their continent-ocean transitions |
title_full_unstemmed |
Insights into the style and geodynamic implications of circum-Antarctic passive continental margins and their continent-ocean transitions |
title_sort |
insights into the style and geodynamic implications of circum-antarctic passive continental margins and their continent-ocean transitions |
publishDate |
2008 |
url |
https://epic.awi.de/id/eprint/18664/ https://hdl.handle.net/10013/epic.30308 |
geographic |
Antarctic Antarctic Peninsula New Zealand Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula New Zealand Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean |
op_source |
EPIC313th International Symposium on Deep Seismic Profling of the Continents and their Margins (SEISMIX 2008); 8-13 June 2008, Saariselkä, Finland. |
op_relation |
Gohl, K. orcid:0000-0002-9558-2116 (2008) Insights into the style and geodynamic implications of circum-Antarctic passive continental margins and their continent-ocean transitions , 13th International Symposium on Deep Seismic Profling of the Continents and their Margins (SEISMIX 2008); 8-13 June 2008, Saariselkä, Finland. . hdl:10013/epic.30308 |
_version_ |
1766124494225670144 |