El límite Cuenca Powell/Mar de Weddell. Estructura y relación con la fragmentación Cenozoica de la Península Antártica.
- Balanyá, J.C. 1
- Galindo-Zaldívar, J. 1
- Jabaloy, A. 1
- Maldonado, A. 2
- Rodríguez-Fernández, J. 2
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1
Universidad de Granada
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2
Instituto Andaluz de Ciencias de la Tierra
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ISSN: 0213-683X
Año de publicación: 1996
Título del ejemplar: Comunicaciones presentadas en el IV Congreso Nacional de Geología, Alcalá de Henares, 1996
Número: 20
Páginas: 823-825
Tipo: Artículo
Otras publicaciones en: Geogaceta
Resumen
Late Paleogene to Neogene continental fragmentation of the Northern Antarctic Peninsula caused the development of small oceanic-floored basins such as Powell Basin. On the basis of MCS profiles and swath bathymetry collected during Hesant 92/93 cruise, a tectonic map of the transition zone between Powell Basin and the Weddell Sea, a Mesozoic oceanic domain opened during the Gondwana breakup, was ellaborated. The E-W morphologic high (50x250 km) that separates these two domains has features of an interbasin antithetic ridge developed in a transtensional regime. This tectonic high appears to be a fragment of the western passive margin of the Weddell Sea, strongly modified during the late Cenozoic by the Powell Basin development tectonics.