Continental platform and continent-ocean transitions/boundaries
Antarctica was the centerpiece of the Gondwana supercontinent. About 13,900 km of Antarcticas 15,900-km-long continental margins (87 percent) are of rifted divergent type, 1600 km (10 percent) were converted from a subduction type to a passive margin after ridge-trench collision along the Pacific si...
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ftawi:oai:epic.awi.de:20802 2023-05-15T13:39:47+02:00 Continental platform and continent-ocean transitions/boundaries Gohl, Karsten 2009 https://epic.awi.de/id/eprint/20802/ https://hdl.handle.net/10013/epic.33018 unknown Gohl, K. orcid:0000-0002-9558-2116 (2009) Continental platform and continent-ocean transitions/boundaries , ANTScape Workshop, ACE Subcommittee on Antarctic Paleotopographic Maps, LeedsApril 2009. . hdl:10013/epic.33018 EPIC3ANTScape Workshop, ACE Subcommittee on Antarctic Paleotopographic Maps, LeedsApril 2009., 15 Conference notRev 2009 ftawi 2021-12-24T15:33:33Z Antarctica was the centerpiece of the Gondwana supercontinent. About 13,900 km of Antarcticas 15,900-km-long continental margins (87 percent) are of rifted divergent type, 1600 km (10 percent) were converted from a subduction type to a passive margin after ridge-trench collision along the Pacific side of the Antarctic Peninsula, and 400 km (3 percent) are of active convergent type. In recent years the volume of geophysical data along the continental margin of Antarctica has increased substantially, which allows differentiation of the crustal characteristics of its continent-ocean boundaries and transitions (COB/COT). These data and geodynamic modeling indicate that the cause, style, and process of breakup, separation and shelf formation were quite different along the Antarctic margins. A circum-Antarctic map shows the crustal styles of the margins and the location and geophysical characteristics of the COT. The data indicate that only a quarter of the rifted margins are of volcanic type. About 70 percent of the rifted passive margins contain extended continental crust stretching between 50 and 300 km oceanward of the shelf edge. Identifications of the COT/COB and an understanding of its process of formation and crustal thinning have consequences for plate-kinematic reconstructions, geodynamic syntheses and the generation of paleobathymetric and paleotopographic grids for paleo-climate simulations. Conference Object Antarc* Antarctic Antarctic Peninsula Antarctica Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Antarctic Peninsula Pacific The Antarctic |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Antarctica was the centerpiece of the Gondwana supercontinent. About 13,900 km of Antarcticas 15,900-km-long continental margins (87 percent) are of rifted divergent type, 1600 km (10 percent) were converted from a subduction type to a passive margin after ridge-trench collision along the Pacific side of the Antarctic Peninsula, and 400 km (3 percent) are of active convergent type. In recent years the volume of geophysical data along the continental margin of Antarctica has increased substantially, which allows differentiation of the crustal characteristics of its continent-ocean boundaries and transitions (COB/COT). These data and geodynamic modeling indicate that the cause, style, and process of breakup, separation and shelf formation were quite different along the Antarctic margins. A circum-Antarctic map shows the crustal styles of the margins and the location and geophysical characteristics of the COT. The data indicate that only a quarter of the rifted margins are of volcanic type. About 70 percent of the rifted passive margins contain extended continental crust stretching between 50 and 300 km oceanward of the shelf edge. Identifications of the COT/COB and an understanding of its process of formation and crustal thinning have consequences for plate-kinematic reconstructions, geodynamic syntheses and the generation of paleobathymetric and paleotopographic grids for paleo-climate simulations. |
format |
Conference Object |
author |
Gohl, Karsten |
spellingShingle |
Gohl, Karsten Continental platform and continent-ocean transitions/boundaries |
author_facet |
Gohl, Karsten |
author_sort |
Gohl, Karsten |
title |
Continental platform and continent-ocean transitions/boundaries |
title_short |
Continental platform and continent-ocean transitions/boundaries |
title_full |
Continental platform and continent-ocean transitions/boundaries |
title_fullStr |
Continental platform and continent-ocean transitions/boundaries |
title_full_unstemmed |
Continental platform and continent-ocean transitions/boundaries |
title_sort |
continental platform and continent-ocean transitions/boundaries |
publishDate |
2009 |
url |
https://epic.awi.de/id/eprint/20802/ https://hdl.handle.net/10013/epic.33018 |
geographic |
Antarctic Antarctic Peninsula Pacific The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Pacific The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_source |
EPIC3ANTScape Workshop, ACE Subcommittee on Antarctic Paleotopographic Maps, LeedsApril 2009., 15 |
op_relation |
Gohl, K. orcid:0000-0002-9558-2116 (2009) Continental platform and continent-ocean transitions/boundaries , ANTScape Workshop, ACE Subcommittee on Antarctic Paleotopographic Maps, LeedsApril 2009. . hdl:10013/epic.33018 |
_version_ |
1766124883122585600 |