Identification of Mass Transport Deposits on the Submarine Bank of Portimão (Gulf of Cadiz, SW Iberia)

Identification of Mass Transport Deposits on the Submarine Bank of Portimão (Gulf of Cadiz, SW Iberia)

Joint Assembly IAPSO-AIAMA-IAGA , Good Hope for Earth Sciences, 27 August - 1 September 2017, Cape Town, South Africa

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Main Authors: Silva, Pedro, Roque, Cristina, Drago, Teresa, Lopes, A., Alonso, Belén, Vázquez, Juan Tomás, Casas, David, López-González, Nieves, Ercilla, Gemma
Other Authors: Instituto Dom Luiz
Format: comunicación de congreso biblioteca
Published: 2017-08-27
Subjects:Submarine mass transport deposits, Portimão bank, Gulf of Cadiz, Magnetic fabrics,
Online Access:http://hdl.handle.net/10261/179148
http://dx.doi.org/10.13039/501100011656
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spelling dig-icm-es-10261-1791482022-12-14T12:20:01Z Identification of Mass Transport Deposits on the Submarine Bank of Portimão (Gulf of Cadiz, SW Iberia) Silva, Pedro Roque, Cristina Drago, Teresa Lopes, A. Alonso, Belén Vázquez, Juan Tomás Casas, David López-González, Nieves Ercilla, Gemma Instituto Dom Luiz Submarine mass transport deposits Portimão bank Gulf of Cadiz Magnetic fabrics Joint Assembly IAPSO-AIAMA-IAGA , Good Hope for Earth Sciences, 27 August - 1 September 2017, Cape Town, South Africa Submarine mass transport deposits (MTDs) plays an important geo-hazards role along continental margins. Their identification and characterization is then crucial to understand their sources, dynamics, frequency and spatial distribution. In this work a piston core located at the slope (2876 m water depth) of the southern flank of Portimao Bank (Portugal, Gulf of Cadiz, SW Iberia) underwent detailed magnetic (fabric and rock magnetism) and sedimentological (grain-size, carbonates, organic matter) analyses complemented by AMS 14C dating. Such multidisciplinary study identified about one meter of sediments that is unconformable with the ages obtained above and below this layer. Its magnetic fabric, as determined by anisotropy of magnetic susceptibility, indicates sharply changes from oblate to neutral shape, decrease of the anisotropy and preferred orientation of the magnetic susceptibility ellipsoid. Such layer is also individualized by sedimentary parameters, especially in its upper part by a lighter colour and decrease of the mean grain size than the rest of the core. Based on these results it is possible to conclude that the sedimentary column analyzed here shows evidence of an on-going development of a slide, which is well individualized and characterized by magnetic fabric studies. The authors wish to acknowledge MONTERA (CTM2009-14157-C02) project for its major contribution without which this work wouldn't be possible Publication supported by project FCT UID/GEO/50019/2013 - Instituto Dom Luiz Peer Reviewed 2019-04-03T07:20:27Z 2019-04-03T07:20:27Z 2017-08-27 2019-04-03T07:20:28Z comunicación de congreso http://purl.org/coar/resource_type/c_5794 Joint Assembly IAPSO-AIAMA-IAGA (2017) http://hdl.handle.net/10261/179148 http://dx.doi.org/10.13039/501100011656 Sí none
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 Submarine mass transport deposits
Portimão bank
Gulf of Cadiz
Magnetic fabrics
Submarine mass transport deposits
Portimão bank
Gulf of Cadiz
Magnetic fabrics
spellingShingle Submarine mass transport deposits
Portimão bank
Gulf of Cadiz
Magnetic fabrics
Submarine mass transport deposits
Portimão bank
Gulf of Cadiz
Magnetic fabrics
Silva, Pedro
Roque, Cristina
Drago, Teresa
Lopes, A.
Alonso, Belén
Vázquez, Juan Tomás
Casas, David
López-González, Nieves
Ercilla, Gemma
Identification of Mass Transport Deposits on the Submarine Bank of Portimão (Gulf of Cadiz, SW Iberia)
description Joint Assembly IAPSO-AIAMA-IAGA , Good Hope for Earth Sciences, 27 August - 1 September 2017, Cape Town, South Africa
author2 Instituto Dom Luiz
author_facet Instituto Dom Luiz
Silva, Pedro
Roque, Cristina
Drago, Teresa
Lopes, A.
Alonso, Belén
Vázquez, Juan Tomás
Casas, David
López-González, Nieves
Ercilla, Gemma
format comunicación de congreso
topic_facet Submarine mass transport deposits
Portimão bank
Gulf of Cadiz
Magnetic fabrics
author Silva, Pedro
Roque, Cristina
Drago, Teresa
Lopes, A.
Alonso, Belén
Vázquez, Juan Tomás
Casas, David
López-González, Nieves
Ercilla, Gemma
author_sort Silva, Pedro
title Identification of Mass Transport Deposits on the Submarine Bank of Portimão (Gulf of Cadiz, SW Iberia)
title_short Identification of Mass Transport Deposits on the Submarine Bank of Portimão (Gulf of Cadiz, SW Iberia)
title_full Identification of Mass Transport Deposits on the Submarine Bank of Portimão (Gulf of Cadiz, SW Iberia)
title_fullStr Identification of Mass Transport Deposits on the Submarine Bank of Portimão (Gulf of Cadiz, SW Iberia)
title_full_unstemmed Identification of Mass Transport Deposits on the Submarine Bank of Portimão (Gulf of Cadiz, SW Iberia)
title_sort identification of mass transport deposits on the submarine bank of portimão (gulf of cadiz, sw iberia)
publishDate 2017-08-27
url http://hdl.handle.net/10261/179148
http://dx.doi.org/10.13039/501100011656
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