Seismic geomorphological reconstructions of Plio-Pleistocene bottom current variability at Goban Spur

Sedimentary evolution of the Le Danois contourite drift systems (southern Bay of Biscay, NE Atlantic): A reconstruction of the Atlantic Mediterranean Water circulation since the Pliocene

“…The Le Danois CDS shows similar seismic characteristics by comparing with those in the Gulf of Cádiz (Hernández-Molina et al, 2016) (Fig. 3), along the SW Portugues e margin (Teixeira et al, 2019), in the Landes Plateau (Faugères et al, 2002), in Goban Spur (Delivet et al, 2016) and Porcupine Seabight (Van Rooij et al, 2007). These regions are namely located along the pathways of the MOW/AMW from the proximal to distal sites (Hernández -Molina et al, 2011).…”

“…Another alternative, to cause the absence of mounded contouri te drifts in the Le Danois Bank region is the domination of the North Atlantic Deep Water (NADW). There is no evidence of contourite drifts during this time interv al in Goban Spur and Porcupine Seabi ght (Van Rooij et al, 2007;Delivet et al, 2016) which could be explained since the AMW was so weak that it has very little or non-influence on this margin. In addi tion, to that marginwide tectonic tilting and erosive processes associated with the enhanced NADW dominated these regions during the early Pliocene (Stoker et al, 2005;Elliot et al, 2006).…”

“…The interface between AMW and LSW (1400 -1700 m, Delivet et al, 2016), however, could have provided a favourable environment for the occurrence of internal waves, in turn generating sediment waves. Similar features are observed in Goban Spur, where the internal ti de regime was promoted by bottom currents J o u r n a l P r e -p r o o f Journal Pre-proof and internal waves locating at the AMW/LSW interface induced the formation of s ediment waves (positioned at 1300-1600 m) (White, 2006;White and Dorschel, 2010;Delivet et al, 2016). The scales of wave height and length, vertical position and time ranges of thes e sediment waves are correlated with ones in the s tudy area, suggesting a similar formation mechanism.…”

Sequence architecture and depositional evolution of the late Palaeogene in southwestern slope of Lufeng Depression, Pearl River Mouth Basin: Responses to tectonic processes and base‐level changes

“…Flattening a horizontal depositional surface in ancient times is employed to reconstruct the palaeogeomorphology (uplift mainly) and clarify tectonic evolution in different target intervals. However, palaeo-water depth and decompaction calibrations are used to increase the confidence of palaeogeomorphology reconstruction (Bhattacharya & Giosan, 2003;Delivet, Van Eetvelt, Monteys, Ribo, & Van Rooij, 2016;Rodriguez-Gonzalez, Fernandez-Turiel, Perez-Torrado, Gimeno, & Aulinas, 2010;Vieria, 2008). In addition, the tectonic subsidence rates and history are reconstructed during the Palaeogene by using a back-stripping technique (Cowie, Angelo, Kusznir, & Manatschal, 2015;Guo, Xie, Shen, & Pang, 2013;Lin et al, 2014;Roberts, Kusznir, Yielding, & Styles, 1998;Smallwood, 2009;Van Sickel, Kominz, Miller, & Browning, 2004;Watts & Ryan, 1976;Wei, Meng, Wu, & Li, 2012).…”

Morphological features and associated bottom-current dynamics in the Le Danois Bank region (southern Bay of Biscay, NE Atlantic): A model in a topographically constrained small basin

“…Sediment waves created by internal waves are documented in several regions (Pomar et al, 2012;Delivet et al, 2016;Ribó et al, 2016). When internal waves propagate down a sloping bottom, three possible reflection conditions exist based on the propagation angle of the internal wave (c) and the bottom slope angle (γ) (Cacchione et al, 2002).…”