Shallow crustal structure and evidences of bottom current flows imprinted on contourite deposits of the SW Scotia Sea basin (Antarctica)

Yasmina Martos-Martín, Fernando Bohoyo, Jesús Galindo-Zaldívar, Javier Hernandez-Molina, Francisco Lobo, Andrés Maldonado, Lara F. Pérez

Publikation: Bidrag til bog/rapport/konferenceproceedingsKonferenceartikel i proceedingspeer review

Resumé

The southwestern sector of the Scotia Sea is located in the proximity of the boundary between the Scotia and Antarctic plates and also close to the active Shackleton Fracture Zone. This area is a key region to constrain the opening of the Drake Passage since the Oligocene. The opening of the Passage holds significant implications for global ocean circulation and for the instauration of the Antarctic Circumpolar Current. Geophysical information from 15 profiles of two surveys carried out in 1992 and 1992/1993 have been integrated in new magnetic anomaly maps identifying the main structures taking into account the satellite free air anomaly data and estimating their depths. Additionally, we have interpreted three parallel seismic profiles in order to identify and correlate the main seismic units. These seismic features suggest a control of main structures on the evolution of bottom current flows, sediment supply and water mass distribution. We interpreted the deposits as contourites developed under the influence of the Weddell Sea Deep Water.
OriginalsprogEngelsk
TitelDeep-water circulation: Processes & products
RedaktørerF. Javier Hernández-Molina, Dorrik A.V. Stow, Estefanía Llave, Michele Rebesco, Gemma Ercilla, David Van Rooij, Anxo Mena, Juan T. Vázquez, Antje Voelker
ForlagSociedad Geologica de Espana
Sider117-118
Antal sider2
StatusUdgivet - 2010
Udgivet eksterntJa
BegivenhedDeep-water circulation: Processes & products - Baiona, Spain
Varighed: 16 jun. 201018 jun. 2010

Publikationsserier

NavnGeo-Temas
Vol/bind11
ISSN1576-5172

Konference

KonferenceDeep-water circulation: Processes & products
ByBaiona, Spain
Periode16/06/1018/06/10

Programområde

  • Programområde 2: Vandressourcer

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