The Gebra-Magia Complex: mass-transport processes reworking trough-mouth fans in the Central Bransfield Basin (Antarctica)
15 pages, 9 figures, 1 table The Gebra-Magia Complex is an important example of a submarine mass-movement composite located on the lower continental slope of the Antarctic Peninsula (Central Bransfield Basin). Continuous instability dynamics over time is inferred to have affected the palaeo-trough-m...
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ftcsic:oai:digital.csic.es:10261/163635 2024-02-11T09:57:51+01:00 The Gebra-Magia Complex: mass-transport processes reworking trough-mouth fans in the Central Bransfield Basin (Antarctica) Casas, David García, Marga Bohoyo, Fernando Maldonado, Andrés Ercilla, Gemma 2018 http://hdl.handle.net/10261/163635 https://doi.org/10.1144/SP461.10 unknown Geological Society of London #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2015-65461-C2-2-R https://doi.org/10.1144/SP461.10 Sí issn: 0305-8719 e-issn: 2041-4927 Exploration of Subsurface Antarctica: Uncovering Past Changes and Modern Processes: 61-75 (2018) Geological Society Special Publication 461: 61-75 (2018) 978-1-78620-322-9 http://hdl.handle.net/10261/163635 doi:10.1144/SP461.10 none capítulo de libro http://purl.org/coar/resource_type/c_3248 2018 ftcsic https://doi.org/10.1144/SP461.10 2024-01-16T10:29:52Z 15 pages, 9 figures, 1 table The Gebra-Magia Complex is an important example of a submarine mass-movement composite located on the lower continental slope of the Antarctic Peninsula (Central Bransfield Basin). Continuous instability dynamics over time is inferred to have affected the palaeo-trough-mouth fans present in the study area. The depositional architecture and the outstanding relief of the Gebra Valley, which is the most striking morphological feature in the area, determine the asymmetrical morphology of the complex. This complex is characterized, from east to west, by an open-slope margin flanking the sidewall of the Gebra Valley, the Gebra Valley itself and a SW margin that is connected to the Magia area by a large scar approximately 7.8 km to the SW. The Gebra Valley is a Quaternary debris valley resulting from repeated large-scale mass-transport and cut-and-fill processes. In contrast, the Magia area is dominated by unchannelized sedimentary instability processes, resulting in a different sedimentary architecture and morphology. The near-surface sediments in the Gebra-Magia Complex document the continuous occurrence of recent mass movements, as also evidenced by flows transported downslope as unchannelized or channelized flows. Climate and tectonic activity are considered the primary factors controlling the development of the complex This study was supported by the Spanish projects MAGIA (ANT97-0584), CONPACA (CTM2011-30241-C02/01ANT), TASMANDRAKE (CTM2014-60451-C2-02/01), MOWER (CTM2012-39599-C03) and FAUCES (CTM2015-65461-C2-1-R) Peer Reviewed Book Part Antarc* Antarctic Antarctic Peninsula Antarctica Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula The Antarctic Geological Society, London, Special Publications 461 1 61 75 |
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Digital.CSIC (Spanish National Research Council) |
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ftcsic |
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description |
15 pages, 9 figures, 1 table The Gebra-Magia Complex is an important example of a submarine mass-movement composite located on the lower continental slope of the Antarctic Peninsula (Central Bransfield Basin). Continuous instability dynamics over time is inferred to have affected the palaeo-trough-mouth fans present in the study area. The depositional architecture and the outstanding relief of the Gebra Valley, which is the most striking morphological feature in the area, determine the asymmetrical morphology of the complex. This complex is characterized, from east to west, by an open-slope margin flanking the sidewall of the Gebra Valley, the Gebra Valley itself and a SW margin that is connected to the Magia area by a large scar approximately 7.8 km to the SW. The Gebra Valley is a Quaternary debris valley resulting from repeated large-scale mass-transport and cut-and-fill processes. In contrast, the Magia area is dominated by unchannelized sedimentary instability processes, resulting in a different sedimentary architecture and morphology. The near-surface sediments in the Gebra-Magia Complex document the continuous occurrence of recent mass movements, as also evidenced by flows transported downslope as unchannelized or channelized flows. Climate and tectonic activity are considered the primary factors controlling the development of the complex This study was supported by the Spanish projects MAGIA (ANT97-0584), CONPACA (CTM2011-30241-C02/01ANT), TASMANDRAKE (CTM2014-60451-C2-02/01), MOWER (CTM2012-39599-C03) and FAUCES (CTM2015-65461-C2-1-R) Peer Reviewed |
format |
Book Part |
author |
Casas, David García, Marga Bohoyo, Fernando Maldonado, Andrés Ercilla, Gemma |
spellingShingle |
Casas, David García, Marga Bohoyo, Fernando Maldonado, Andrés Ercilla, Gemma The Gebra-Magia Complex: mass-transport processes reworking trough-mouth fans in the Central Bransfield Basin (Antarctica) |
author_facet |
Casas, David García, Marga Bohoyo, Fernando Maldonado, Andrés Ercilla, Gemma |
author_sort |
Casas, David |
title |
The Gebra-Magia Complex: mass-transport processes reworking trough-mouth fans in the Central Bransfield Basin (Antarctica) |
title_short |
The Gebra-Magia Complex: mass-transport processes reworking trough-mouth fans in the Central Bransfield Basin (Antarctica) |
title_full |
The Gebra-Magia Complex: mass-transport processes reworking trough-mouth fans in the Central Bransfield Basin (Antarctica) |
title_fullStr |
The Gebra-Magia Complex: mass-transport processes reworking trough-mouth fans in the Central Bransfield Basin (Antarctica) |
title_full_unstemmed |
The Gebra-Magia Complex: mass-transport processes reworking trough-mouth fans in the Central Bransfield Basin (Antarctica) |
title_sort |
gebra-magia complex: mass-transport processes reworking trough-mouth fans in the central bransfield basin (antarctica) |
publisher |
Geological Society of London |
publishDate |
2018 |
url |
http://hdl.handle.net/10261/163635 https://doi.org/10.1144/SP461.10 |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2015-65461-C2-2-R https://doi.org/10.1144/SP461.10 Sí issn: 0305-8719 e-issn: 2041-4927 Exploration of Subsurface Antarctica: Uncovering Past Changes and Modern Processes: 61-75 (2018) Geological Society Special Publication 461: 61-75 (2018) 978-1-78620-322-9 http://hdl.handle.net/10261/163635 doi:10.1144/SP461.10 |
op_rights |
none |
op_doi |
https://doi.org/10.1144/SP461.10 |
container_title |
Geological Society, London, Special Publications |
container_volume |
461 |
container_issue |
1 |
container_start_page |
61 |
op_container_end_page |
75 |
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1790593394441977856 |