Pliocene and Quaternary depositional model of the Algarve margin contourite drifts (Gulf of Cadiz, SW Iberia): Seismic architecture, tectonic control and paleoceanographic insights

Site U1390

“…This area, located in the central middle slope of the Gulf of Cádiz, has been affected by recent tectonic activity, which controlled the major morphostructural features and its recent evolution Maestro et al, 2003;Terrinha et al, 2003Terrinha et al, , 2006Terrinha et al, , 2009Medialdea et al, 2004Medialdea et al, , 2009Fernández-Puga et al, 2007;Zitellini et al, 2009;Duarte et al, 2010;Roque et al, 2012) and determined a complex pattern of different erosive features, such as contourite moats, contourite channels, marginal valleys, and large isolated furrows (Hernández-Molina et al, 2003, 2006Llave et al, 2007a;García et al, 2009) (see Fig. F4 in the "Site U1389" chapter [Expedition 339 Scientists, 2013g]).…”

“…In the Gulf of Cádiz, it is theorized that by the end of the early Pliocene subsidence decreased and the continental margin was evolving toward its present, more stable conditions Lopes et al, 2006;Medialdea et al, 2004;Roque et al, 2012). Nevertheless some neotectonic activity is also evident, as expressed by changes in the submarine topography, the occur-…”

“…IODP | Volume 339 2 rence of mud volcanoes and diapiric ridges Pinheiro et al, 2003;Terrinha et al, 2009;Fernández-Puga et al, 2007;Duarte et al, 2010), and fault reactivation (Alves et al, 2003;Medialdea et al, 2004Medialdea et al, , 2009Zitellini et al, 2009;Terrinha et al, 2006Terrinha et al, , 2009). In addition, some studies have reported how the tectonics have exerted strong control on the pathways of MOW and, therefore, on the architecture of the CDS (Llave et al, 2001(Llave et al, , 2007b(Llave et al, , 2011García et al, 2009;Roque et al, 2012). Llave et al (2007b) and Stow et al (2011) postulate that this tectonic activity has controlled the change from a tabular MOW flow regime to separate flows forming distinct cores of MOW in the Gulf of Cádiz.…”

“…The Guadalquivir Bank represents a structural high in which Paleozoic and Mesozoic rocks of the Iberian margin have been uplifted (Gràcia et al, 2003;Medialdea et al, 2004Medialdea et al, , 2009Terrinha et al, 2003Terrinha et al, , 2006Roque et al, 2012) from the Neogene through the present. This morphostructure is associated with a cluster of earthquake epicenters showing a dominant reversed motion (Borges et al, 2001;Buforn et al, 2004).…”

IODP Expedition 339 in the Gulf of Cadiz and off West Iberia: decoding the environmental significance of the Mediterranean outflow water and its global influence

“…The extensive CDS that has been developing within the Gulf of Cádiz and extending around the west Iberian margin over the past 5 My is a direct result of MOW (e.g., Madelain, 1970;Gonthier et al, 1984;Faugères et al, 1985;Nelson et al, 1993Nelson et al, , 1999Llave et al, 2001Llave et al, , 2006Llave et al, , 2007Llave et al, , 2011Stow et al, 2002Stow et al, , 2013aHabgood et al, 2003;Hernández-Molina et al, 2003, 2006, 2011bMulder et al, 2003Mulder et al, , 2006Marchès et al, 2007;Roque et al, 2012;Brackenridge et al, 2013). The high accumulation rates and expanded sedimentary records of drift deposits permit a highresolution examination of past environmental change Voelker et al, 2006).…”