Bottom-current sediment waves and mass-movement deposits on the sines contourite drift, SW Iberia. / Rodrigues, Sara; Teixeira, Manuel; Roque, Cristina; Hernández-Molina, F. J.; Terrinha, Pedro; Llave, Estefania; Ercilla, Gemma; Farran, Marcel.lí.

2018. Paper presented at 20th International Sedimentological Congress, Québec City, Quebec, Canada.

Research output: Contribution to conferencePaperpeer-review

Published

Standard

Bottom-current sediment waves and mass-movement deposits on the sines contourite drift, SW Iberia. / Rodrigues, Sara; Teixeira, Manuel; Roque, Cristina; Hernández-Molina, F. J.; Terrinha, Pedro; Llave, Estefania; Ercilla, Gemma; Farran, Marcel.lí.

2018. Paper presented at 20th International Sedimentological Congress, Québec City, Quebec, Canada.

Research output: Contribution to conferencePaperpeer-review

Harvard

Rodrigues, S, Teixeira, M, Roque, C, Hernández-Molina, FJ, Terrinha, P, Llave, E, Ercilla, G & Farran, ML 2018, 'Bottom-current sediment waves and mass-movement deposits on the sines contourite drift, SW Iberia', Paper presented at 20th International Sedimentological Congress, Québec City, Canada, 13/08/18 - 17/08/18.

APA

Rodrigues, S., Teixeira, M., Roque, C., Hernández-Molina, F. J., Terrinha, P., Llave, E., Ercilla, G., & Farran, M. L. (2018). Bottom-current sediment waves and mass-movement deposits on the sines contourite drift, SW Iberia. Paper presented at 20th International Sedimentological Congress, Québec City, Quebec, Canada.

Vancouver

Rodrigues S, Teixeira M, Roque C, Hernández-Molina FJ, Terrinha P, Llave E et al. Bottom-current sediment waves and mass-movement deposits on the sines contourite drift, SW Iberia. 2018. Paper presented at 20th International Sedimentological Congress, Québec City, Quebec, Canada.

Author

Rodrigues, Sara ; Teixeira, Manuel ; Roque, Cristina ; Hernández-Molina, F. J. ; Terrinha, Pedro ; Llave, Estefania ; Ercilla, Gemma ; Farran, Marcel.lí. / Bottom-current sediment waves and mass-movement deposits on the sines contourite drift, SW Iberia. Paper presented at 20th International Sedimentological Congress, Québec City, Quebec, Canada.

BibTeX

@conference{5c0e2194d78849b285ab91ceb1ccd0d7,
title = "Bottom-current sediment waves and mass-movement deposits on the sines contourite drift, SW Iberia",
abstract = "Large-scale sediment waves and mass movement deposits have been recently discovered, based on multichannel seismic reflection data, associated to the Sines Contourite Drift, on the middle continental slope along the Southwest Portuguese Margin. The sedimentary waves expand over 30 km2 between 750 m and 1850 m water depth, having sigmoid shapes with wavelengths from 500 to 2150 m, wave heights between 40 and 63 m and wave crests subparallel to the bathymetric contours. A basal discontinuity marks the onset of sediment wave development and upslope migration towards east since the Early Quaternary (2.5 Ma ago). In addition, numerous mass-movement deposits are seen mostly concentrated in the west of the Sines Drift, associated with the steep Pereira de Sousa Scarp. The mass-movements are characterized by amphitheater shapes, head scarps and occur staggered till the slope, accumulating at the base as thick deposits. The morphology and location of the sedimentary waves suggests a close relation to the circulation of the Mediterranean Outflow Water (MOW). This water mass exits the Strait of Gibraltar and flows northward along the continental slope, due to the Coriolis Force. Climatic-eustatic fluctuations in the Quaternary caused several enhancements and deepening of the Mediterranean Outflow Water and, subsequently, interaction with the seafloor. With this work we propose that the dynamics between the MOW and the continental slope is responsible for generating the sediment waves, but also the presence and morphology of these waves encouraged the development of mass-movement deposits, especially when the setting corresponds to an unstable and oversteepening continental slope. This research is a good example of the interaction between along- and across-slope processes and it could be useful for a better understanding of the implications of bottom currents in controlling the continental margin morphology.",
keywords = "contourites, SW Iberia, Sines Drift, Miocene-Quaternary, sediment waves, mass-transport deposits, seismic stratigraphy",
author = "Sara Rodrigues and Manuel Teixeira and Cristina Roque and Hern{\'a}ndez-Molina, {F. J.} and Pedro Terrinha and Estefania Llave and Gemma Ercilla and Marcel.l{\'i} Farran",
year = "2018",
month = aug,
day = "17",
language = "English",
note = "20th International Sedimentological Congress ; Conference date: 13-08-2018 Through 17-08-2018",
url = "http://isc2018.org/",

}

RIS

TY - CONF

T1 - Bottom-current sediment waves and mass-movement deposits on the sines contourite drift, SW Iberia

AU - Rodrigues, Sara

AU - Teixeira, Manuel

AU - Roque, Cristina

AU - Hernández-Molina, F. J.

AU - Terrinha, Pedro

AU - Llave, Estefania

AU - Ercilla, Gemma

AU - Farran, Marcel.lí

PY - 2018/8/17

Y1 - 2018/8/17

N2 - Large-scale sediment waves and mass movement deposits have been recently discovered, based on multichannel seismic reflection data, associated to the Sines Contourite Drift, on the middle continental slope along the Southwest Portuguese Margin. The sedimentary waves expand over 30 km2 between 750 m and 1850 m water depth, having sigmoid shapes with wavelengths from 500 to 2150 m, wave heights between 40 and 63 m and wave crests subparallel to the bathymetric contours. A basal discontinuity marks the onset of sediment wave development and upslope migration towards east since the Early Quaternary (2.5 Ma ago). In addition, numerous mass-movement deposits are seen mostly concentrated in the west of the Sines Drift, associated with the steep Pereira de Sousa Scarp. The mass-movements are characterized by amphitheater shapes, head scarps and occur staggered till the slope, accumulating at the base as thick deposits. The morphology and location of the sedimentary waves suggests a close relation to the circulation of the Mediterranean Outflow Water (MOW). This water mass exits the Strait of Gibraltar and flows northward along the continental slope, due to the Coriolis Force. Climatic-eustatic fluctuations in the Quaternary caused several enhancements and deepening of the Mediterranean Outflow Water and, subsequently, interaction with the seafloor. With this work we propose that the dynamics between the MOW and the continental slope is responsible for generating the sediment waves, but also the presence and morphology of these waves encouraged the development of mass-movement deposits, especially when the setting corresponds to an unstable and oversteepening continental slope. This research is a good example of the interaction between along- and across-slope processes and it could be useful for a better understanding of the implications of bottom currents in controlling the continental margin morphology.

AB - Large-scale sediment waves and mass movement deposits have been recently discovered, based on multichannel seismic reflection data, associated to the Sines Contourite Drift, on the middle continental slope along the Southwest Portuguese Margin. The sedimentary waves expand over 30 km2 between 750 m and 1850 m water depth, having sigmoid shapes with wavelengths from 500 to 2150 m, wave heights between 40 and 63 m and wave crests subparallel to the bathymetric contours. A basal discontinuity marks the onset of sediment wave development and upslope migration towards east since the Early Quaternary (2.5 Ma ago). In addition, numerous mass-movement deposits are seen mostly concentrated in the west of the Sines Drift, associated with the steep Pereira de Sousa Scarp. The mass-movements are characterized by amphitheater shapes, head scarps and occur staggered till the slope, accumulating at the base as thick deposits. The morphology and location of the sedimentary waves suggests a close relation to the circulation of the Mediterranean Outflow Water (MOW). This water mass exits the Strait of Gibraltar and flows northward along the continental slope, due to the Coriolis Force. Climatic-eustatic fluctuations in the Quaternary caused several enhancements and deepening of the Mediterranean Outflow Water and, subsequently, interaction with the seafloor. With this work we propose that the dynamics between the MOW and the continental slope is responsible for generating the sediment waves, but also the presence and morphology of these waves encouraged the development of mass-movement deposits, especially when the setting corresponds to an unstable and oversteepening continental slope. This research is a good example of the interaction between along- and across-slope processes and it could be useful for a better understanding of the implications of bottom currents in controlling the continental margin morphology.

KW - contourites

KW - SW Iberia

KW - Sines Drift

KW - Miocene-Quaternary

KW - sediment waves

KW - mass-transport deposits

KW - seismic stratigraphy

UR - https://www.researchgate.net/publication/330338146_Bottom-current_sediment_waves_and_mass-movement_deposits_on_the_sines_contourite_drift_SW_Iberia

UR - http://espace.inrs.ca/id/eprint/9682/

M3 - Paper

T2 - 20th International Sedimentological Congress

Y2 - 13 August 2018 through 17 August 2018

ER -