Galicia Bank sediment transport activity in response to continuous sedimentary instability dynamics: a geotechnical perspective

Yenes, Mariano; Casas, David; Nespereira, José; Monterrubio, Serafín; Ercilla, Gemma; López-González, Nieves; Ministerio de Economía y Competitividad (España)

Galicia Bank sediment transport activity in response to continuous sedimentary instability dynamics: a geotechnical perspective

16 pages, 7 figures, 5 tables

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Bibliographic Details
Main Authors:	Yenes, Mariano, Casas, David, Nespereira, José, Monterrubio, Serafín, Ercilla, Gemma, López-González, Nieves
Other Authors:	Ministerio de Economía y Competitividad (España)
Format:	artículo biblioteca
Published:	Springer 2019-11
Subjects:	Slope stability, Marine sediment strength, Earthquake, Galicia Bank, Seamount, Geotechnical properties,
Online Access:	http://hdl.handle.net/10261/195398 http://dx.doi.org/10.13039/501100003329
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spelling	dig-icm-es-10261-1953982022-12-14T12:19:52Z Galicia Bank sediment transport activity in response to continuous sedimentary instability dynamics: a geotechnical perspective Yenes, Mariano Casas, David Nespereira, José Monterrubio, Serafín Ercilla, Gemma López-González, Nieves Ministerio de Economía y Competitividad (España) Slope stability Marine sediment strength Earthquake Galicia Bank Seamount Geotechnical properties 16 pages, 7 figures, 5 tables The sedimentary instability dynamics occurring over time throughout the isolated Galicia Bank (Atlantic Ocean, NW Iberian Peninsula) have been studied using a sedimentological and geotechnical approach featuring a quantitative assessment of slope stability under different scenarios, including earthquake activity. The erosion of the scarps in the Galicia Bank includes the continuous development of small instabilities evacuated along gullies and channels or deposited on slopes. These deposits may be subsequently mobilized, evolving into new sedimentary gravity flows (e.g., turbidity flow). The studied sediments consist mostly of poorly to very poorly sorted sands and silts transported by turbidity currents and occasionally by debris flow processes. The sediments in the study area identified as normally consolidated and located on gently sloping areas (gradients less than 5°) may become unstable if low-magnitude seismic events occur (PGA < 0.12). Even under static conditions, they could become unstable if they are located on slopes of > 10° without any trigger other than oversteepening. In contrast, overconsolidated sediments may remain stable under static conditions and may become unstable on slope gradients > 10° when earthquakes occur with the maximum peak ground acceleration (PGA = 0.34). The sedimentological and geotechnical models presented herein are complementary approaches that can be utilized to understand the long-term sedimentary instability dynamics observed within the study area. Such results are critical for better understanding sedimentary models of the dismantling processes of deep seamounts located far away from continental sedimentary inputs This study was supported by the Spanish projects ANTES (CTM2011-14030-E), MOWER (CTM2012 -39599-C03) and FAUCES (CTM2015-65461-C2-1-R) Peer Reviewed 2019-11-25T09:41:49Z 2019-11-25T09:41:49Z 2019-11 2019-11-25T09:41:50Z artículo http://purl.org/coar/resource_type/c_6501 issn: 1437-3254 e-issn: 1437-3262 doi: 10.1007/s00531-019-01776-w International Journal of Earth Sciences 108(8): 2545-2560 (2019) http://hdl.handle.net/10261/195398 10.1007/s00531-019-01776-w http://dx.doi.org/10.13039/501100003329 #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2015-65461-C2-1-R https://doi.org/10.1007/s00531-019-01776-w Sí open Springer
institution	ICM ES
collection	DSpace
country	España
countrycode	ES
component	Bibliográfico
access	En linea
databasecode	dig-icm-es
tag	biblioteca
region	Europa del Sur
libraryname	Biblioteca del ICM España
topic	Slope stability Marine sediment strength Earthquake Galicia Bank Seamount Geotechnical properties Slope stability Marine sediment strength Earthquake Galicia Bank Seamount Geotechnical properties
spellingShingle	Slope stability Marine sediment strength Earthquake Galicia Bank Seamount Geotechnical properties Slope stability Marine sediment strength Earthquake Galicia Bank Seamount Geotechnical properties Yenes, Mariano Casas, David Nespereira, José Monterrubio, Serafín Ercilla, Gemma López-González, Nieves Galicia Bank sediment transport activity in response to continuous sedimentary instability dynamics: a geotechnical perspective
description	16 pages, 7 figures, 5 tables
author2	Ministerio de Economía y Competitividad (España)
author_facet	Ministerio de Economía y Competitividad (España) Yenes, Mariano Casas, David Nespereira, José Monterrubio, Serafín Ercilla, Gemma López-González, Nieves
format	artículo
topic_facet	Slope stability Marine sediment strength Earthquake Galicia Bank Seamount Geotechnical properties
author	Yenes, Mariano Casas, David Nespereira, José Monterrubio, Serafín Ercilla, Gemma López-González, Nieves
author_sort	Yenes, Mariano
title	Galicia Bank sediment transport activity in response to continuous sedimentary instability dynamics: a geotechnical perspective
title_short	Galicia Bank sediment transport activity in response to continuous sedimentary instability dynamics: a geotechnical perspective
title_full	Galicia Bank sediment transport activity in response to continuous sedimentary instability dynamics: a geotechnical perspective
title_fullStr	Galicia Bank sediment transport activity in response to continuous sedimentary instability dynamics: a geotechnical perspective
title_full_unstemmed	Galicia Bank sediment transport activity in response to continuous sedimentary instability dynamics: a geotechnical perspective
title_sort	galicia bank sediment transport activity in response to continuous sedimentary instability dynamics: a geotechnical perspective
publisher	Springer
publishDate	2019-11
url	http://hdl.handle.net/10261/195398 http://dx.doi.org/10.13039/501100003329
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Galicia Bank sediment transport activity in response to continuous sedimentary instability dynamics: a geotechnical perspective

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