El límite Cuenca Powell/Mar de Weddell. Estructura y relación con la fragmentación Cenozoica de la Península Antàrtica

• Main Authors: Balanyá, Juan Carlos, Galindo Zaldívar, Jesús, Jabaloy, A., Maldonado, Andrés, Rodríguez Fernández, José
• Format: Article in Journal/Newspaper
• Language: Spanish
• Published: Sociedad Geológica de España 1996
• Subjects: Multichannel seismics; Transtensional ridge; Antarctic Peninsula; Antarctic; Límite; mar de Weddell; Powell Basin; The Antarctic; Weddell; Weddell Sea; Antarc*; Mar de Weddell
• Online Access: http://hdl.handle.net/10272/12466

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 Condwana 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