Holocene neoglacial events in the Bransfield Strait (Antarctica). Paleogeographic and paleoclimatic significance
The morphological characterisation of the western submarine island flanks of El Hierro and La Palma differentiates four type-zones that may give new insights into the evolution of oceanic island slopes. The different type-zones result from the interplay between constructive volcanic processes, hemip...
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ftubarcepubl:oai:diposit.ub.edu:2445/32409 2024-02-11T09:56:10+01:00 Holocene neoglacial events in the Bransfield Strait (Antarctica). Paleogeographic and paleoclimatic significance Bárcena, María Ángeles Fabrés Francés, Joan Isla, Enrique Flores Villarejo, José Abel Sierro Sánchez, Francisco Javier Canals Artigas, Miquel Palanques Monteys, Albert 2006-12 13 p. application/pdf http://hdl.handle.net/2445/32409 eng eng Consejo Superior de Investigaciones Científicas (CSIC) Reproducció del document publicat a: http://dx.doi.org/10.3989/scimar.2006.70n4607 Scientia Marina, 2006, vol. 70, num. 4, p. 607-619 Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) http://dx.doi.org/10.3989/scimar.2006.70n4607 0214-8358 http://hdl.handle.net/2445/32409 587174 cc-by-nc (c) Consejo Superior de Investigaciones Científicas (CSIC), 2006 http://creativecommons.org/licenses/by-nc/3.0/es info:eu-repo/semantics/openAccess Holocè Estrets Paleogeografia Paleoclimatologia Antàrtida Holocene Straits Paleogeography Paleoclimatology Antarctica info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2006 ftubarcepubl https://doi.org/10.3989/scimar.2006.70n4607 2024-01-24T00:53:25Z The morphological characterisation of the western submarine island flanks of El Hierro and La Palma differentiates four type-zones that may give new insights into the evolution of oceanic island slopes. The different type-zones result from the interplay between constructive volcanic processes, hemipelagic settling and volcano collapses. The latter results in massive debris avalanche deposits, which form large volcaniclastic aprons. In most cases, the headwall scarps are clearly exposed on the emerged part of the islands. The events that occurred in the youngest and westernmost islands of El Hierro and La Palma have vertical runouts exceeding 6,000 m and volumes that can reach several hundred km3. The landslide frequency for the entire Canaries is one major event per 90 ka. Triggering mechanisms are closely related to magmatic processes. The increase in the shear stress is directly linked with the forceful intrusion of magma along ridge-rift systems, while in the western Canary Islands it seems that the main process reducing shear resistance may be related to the rise in pore pressure due to hydrothermal circulation. Article in Journal/Newspaper Antarc* Antarctica Bransfield Strait Dipòsit Digital de la Universitat de Barcelona Bransfield Strait Scientia Marina 70 4 607 619 |
institution |
Open Polar |
collection |
Dipòsit Digital de la Universitat de Barcelona |
op_collection_id |
ftubarcepubl |
language |
English |
topic |
Holocè Estrets Paleogeografia Paleoclimatologia Antàrtida Holocene Straits Paleogeography Paleoclimatology Antarctica |
spellingShingle |
Holocè Estrets Paleogeografia Paleoclimatologia Antàrtida Holocene Straits Paleogeography Paleoclimatology Antarctica Bárcena, María Ángeles Fabrés Francés, Joan Isla, Enrique Flores Villarejo, José Abel Sierro Sánchez, Francisco Javier Canals Artigas, Miquel Palanques Monteys, Albert Holocene neoglacial events in the Bransfield Strait (Antarctica). Paleogeographic and paleoclimatic significance |
topic_facet |
Holocè Estrets Paleogeografia Paleoclimatologia Antàrtida Holocene Straits Paleogeography Paleoclimatology Antarctica |
description |
The morphological characterisation of the western submarine island flanks of El Hierro and La Palma differentiates four type-zones that may give new insights into the evolution of oceanic island slopes. The different type-zones result from the interplay between constructive volcanic processes, hemipelagic settling and volcano collapses. The latter results in massive debris avalanche deposits, which form large volcaniclastic aprons. In most cases, the headwall scarps are clearly exposed on the emerged part of the islands. The events that occurred in the youngest and westernmost islands of El Hierro and La Palma have vertical runouts exceeding 6,000 m and volumes that can reach several hundred km3. The landslide frequency for the entire Canaries is one major event per 90 ka. Triggering mechanisms are closely related to magmatic processes. The increase in the shear stress is directly linked with the forceful intrusion of magma along ridge-rift systems, while in the western Canary Islands it seems that the main process reducing shear resistance may be related to the rise in pore pressure due to hydrothermal circulation. |
format |
Article in Journal/Newspaper |
author |
Bárcena, María Ángeles Fabrés Francés, Joan Isla, Enrique Flores Villarejo, José Abel Sierro Sánchez, Francisco Javier Canals Artigas, Miquel Palanques Monteys, Albert |
author_facet |
Bárcena, María Ángeles Fabrés Francés, Joan Isla, Enrique Flores Villarejo, José Abel Sierro Sánchez, Francisco Javier Canals Artigas, Miquel Palanques Monteys, Albert |
author_sort |
Bárcena, María Ángeles |
title |
Holocene neoglacial events in the Bransfield Strait (Antarctica). Paleogeographic and paleoclimatic significance |
title_short |
Holocene neoglacial events in the Bransfield Strait (Antarctica). Paleogeographic and paleoclimatic significance |
title_full |
Holocene neoglacial events in the Bransfield Strait (Antarctica). Paleogeographic and paleoclimatic significance |
title_fullStr |
Holocene neoglacial events in the Bransfield Strait (Antarctica). Paleogeographic and paleoclimatic significance |
title_full_unstemmed |
Holocene neoglacial events in the Bransfield Strait (Antarctica). Paleogeographic and paleoclimatic significance |
title_sort |
holocene neoglacial events in the bransfield strait (antarctica). paleogeographic and paleoclimatic significance |
publisher |
Consejo Superior de Investigaciones Científicas (CSIC) |
publishDate |
2006 |
url |
http://hdl.handle.net/2445/32409 |
geographic |
Bransfield Strait |
geographic_facet |
Bransfield Strait |
genre |
Antarc* Antarctica Bransfield Strait |
genre_facet |
Antarc* Antarctica Bransfield Strait |
op_relation |
Reproducció del document publicat a: http://dx.doi.org/10.3989/scimar.2006.70n4607 Scientia Marina, 2006, vol. 70, num. 4, p. 607-619 Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) http://dx.doi.org/10.3989/scimar.2006.70n4607 0214-8358 http://hdl.handle.net/2445/32409 587174 |
op_rights |
cc-by-nc (c) Consejo Superior de Investigaciones Científicas (CSIC), 2006 http://creativecommons.org/licenses/by-nc/3.0/es info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3989/scimar.2006.70n4607 |
container_title |
Scientia Marina |
container_volume |
70 |
container_issue |
4 |
container_start_page |
607 |
op_container_end_page |
619 |
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1790601089888813056 |