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]
1. [1] Universidad de Granada
  
  Universidad de Granada
  
  Granada, España
2. [2] Instituto Andaluz de Ciencias de la Tierra
  
  Instituto Andaluz de Ciencias de la Tierra
  
  Granada, España
Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 4, 1996 (Ejemplar dedicado a: Comunicaciones presentadas en el IV Congreso Nacional de Geología, Alcalá de Henares, 1996), págs. 823-825
Idioma: español
Títulos paralelos:
- The Powell Basin/Weddell Sea boundary. Structure and relationships to the Cenozoic fragmentation of the Antarctic Peninsula
Enlaces
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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.