2024-03-29T05:08:21Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2172082021-05-21T10:05:25Zcom_10261_123com_10261_8com_10261_126col_10261_376col_10261_379
2020-07-30T05:40:06Z
urn:hdl:10261/217208
Tectonic evolution, geomorphology and influence of bottom currents along a large submarine canyon system: The São Vicente Canyon (SW Iberian margin)
Sànchez-Serra, Cristina
Martínez-Loriente, S.
Gràcia, Eulàlia
Urgeles, Roger
Vizcaino, A.
Perea, Héctor
Bartolomé, Rafael
Pallàs, R.
Lo Iacono, Claudio
Díez Tagarró, Susana
Dañobeitia, Juan José
Terrinha, Pedro
Zitellini, Nevio
Ministerio de Economía y Competitividad (España)
Ministerio de Ciencia, Innovación y Universidades (España)
Agencia Estatal de Investigación (España)
Submarine canyon
Thrust faults
Bottom currents
Sedimentary pathways
Sidescan-sonar
Seismic reflection
16 pages, 11 figures, 1 table, supplementary data https://doi.org/10.1016/j.margeo.2020.106219
A multi-scale dataset consisting of multi-beam echo-sounder, 2D multi-channel seismic and sidescan sonar (TOBI) data allows us to identify a large variety of morphologies originating from sedimentary and tectonic processes along the São Vicente Canyon (SVC), which is the largest submarine canyon developed in the external part of the Gulf of Cadiz. The SVC is located in one of the most seismogenic areas of Western Europe. The convergence between the Eurasian and African plates has controlled the formation and evolution of the canyon. The SVC is tectonically controlled by three main thrust faults: the Marquês de Pombal Fault, the São Vicente Fault and the Horseshoe Fault. No major rivers feed sediment to the canyon head, but the main sediment source is related to the dismantling of canyon flanks and the MOW (Mediterranean Overflow Water). This current contributes sediments by two different processes: a) conturites deposition at the head and flanks of the SVC that periodically fail into the canyon; and b) the coarser-grained and denser sediment of the MOW might be trapped at the head of the canyon and could develops into hyperpycnal flows. The SVC is characterized by retrogressive erosion being submarine landslide deposits and scars the main seafloor morphologies. The tectonic and stratigraphic interpretation of seismic profiles indicate that the SVC is a clear example of a diachronous and segmented canyon developed since the Late Miocene in an area of present-day active plate tectonics. This study investigates the interaction between active tectonics, the dynamics of submarine canyons and the resulting geomorphologies
2020-07-30T05:40:06Z
2020-07-30T05:40:06Z
2020-08
2020-07-30T05:40:07Z
artículo
Marine Geology 426: 106219 (2020)
CEX2019-000928-S
http://hdl.handle.net/10261/217208
10.1016/j.margeo.2020.106219
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100011033
Postprint
https://doi.org/10.1016/j.margeo.2020.106219
Sí
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2015-70155-R
https://www.elsevier.com/about/policies/sharing
openAccess
Elsevier