TY - GEN
T1 - Shallow crustal structure and evidences of bottom current flows imprinted on contourite deposits of the SW Scotia Sea basin (Antarctica)
AU - Martos-Martín, Yasmina
AU - Bohoyo, Fernando
AU - Galindo-Zaldívar, Jesús
AU - Hernandez-Molina, Javier
AU - Lobo, Francisco
AU - Maldonado, Andrés
AU - Pérez, Lara F.
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
M3 - Conference article in proceedings
T3 - Geo-Temas
SP - 117
EP - 118
BT - Deep-water circulation: Processes & products
A2 - Hernández-Molina, F. Javier
A2 - Stow, Dorrik A.V.
A2 - Llave, Estefanía
A2 - Rebesco, Michele
A2 - Ercilla, Gemma
A2 - Van Rooij, David
A2 - Mena, Anxo
A2 - Vázquez, Juan T.
A2 - Voelker, Antje
PB - Sociedad Geologica de Espana
T2 - Deep-water circulation: Processes & products
Y2 - 16 June 2010 through 18 June 2010
ER -