Unveiling Powell Basin’s Tectonic Domains and Understanding Its Abnormal Magnetic Anomaly Signature. Is Heat the Key?
Rifting of continental lithosphere leading to oceanic basins is a complex process conditioned by different factors such as the rheology and thermal structure of the underlying lithosphere, as well as underlying asthenospheric dynamics. All these processes, which finally lead to oceanic domains, can...
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ftcsic:oai:digital.csic.es:10261/233386 2024-02-11T09:58:07+01:00 Unveiling Powell Basin’s Tectonic Domains and Understanding Its Abnormal Magnetic Anomaly Signature. Is Heat the Key? Catalán-Morollón, Manuel Martos, Y. M. Galindo Zaldívar, Jesús Pérez, L. F. Bohoyo, Fernando Ministerio de Ciencia e Innovación (España) 2020-10-08 http://hdl.handle.net/10261/233386 https://doi.org/10.3389/feart.2020.580675 https://doi.org/10.13039/501100004837 unknown Frontiers Media #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CTM 2017–89711-C2-2-P Publisher's version http://dx.doi.org/10.3389/feart.2020.580675 Sí doi:10.3389/feart.2020.580675 issn: 2296-6463 Frontiers in Earth Sciences 8 (2020) http://hdl.handle.net/10261/233386 http://dx.doi.org/10.13039/501100004837 open artículo http://purl.org/coar/resource_type/c_6501 2020 ftcsic https://doi.org/10.3389/feart.2020.58067510.13039/501100004837 2024-01-16T11:04:18Z Rifting of continental lithosphere leading to oceanic basins is a complex process conditioned by different factors such as the rheology and thermal structure of the underlying lithosphere, as well as underlying asthenospheric dynamics. All these processes, which finally lead to oceanic domains, can better be recognized in small oceanic basins. Powell Basin is a small oceanic basin bounded to the north by the South Scotia Ridge, to the east by the South Orkney Microcontinent, and to the west by the Antarctic Peninsula. It was formed between the Oligocene and Miocene, however, its age is not well defined, among other reasons due to the small amplitude of its spreading magnetic anomalies. This basin is an ideal framework to analyze the different rifting and spreading phases, which leads from continental crust to the formation of an oceanic domain through different extensional regimes. To identify the different boundaries during the formation of Powell Basin from the beginning of the rifting until the end of the spreading, we use different data sources: magnetic, gravity, multichannel seismic profiles and bathymetry data. We use seismic and bathymetry data to estimate the Total Tectonic Subsidence. Total Tectonic Subsidence has proven to be useful to delineate the different tectonic regimes present from early rifting to the formation of oceanic seafloor. This result together with magnetic data has been used to delimit the oceanic domain and compare with previous authors’ proposals. This method could be applied in any other basin or margin to help delimiting its boundaries. Finally, we analyze the role that an asthenospheric branch intruding from the Scotia Sea played in the evolution of the magnetic anomaly signature on an oceanic basin. This study has been funded through project RTI 2018–099615-B-100 entitled “Estructura Litosférica y Geodinámica de Powell-Drake-Bransfield Rift” under the umbrella of the Programa Estatal de I + D + i Orientada a los Retos de la Sociedad of the Spanish Ministry of Science. JG, FB, ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Scotia Sea Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Powell Basin ENVELOPE(-49.500,-49.500,-62.250,-62.250) Scotia Sea South Scotia Ridge ENVELOPE(-46.500,-46.500,-60.000,-60.000) The Antarctic Frontiers in Earth Science 8 |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
description |
Rifting of continental lithosphere leading to oceanic basins is a complex process conditioned by different factors such as the rheology and thermal structure of the underlying lithosphere, as well as underlying asthenospheric dynamics. All these processes, which finally lead to oceanic domains, can better be recognized in small oceanic basins. Powell Basin is a small oceanic basin bounded to the north by the South Scotia Ridge, to the east by the South Orkney Microcontinent, and to the west by the Antarctic Peninsula. It was formed between the Oligocene and Miocene, however, its age is not well defined, among other reasons due to the small amplitude of its spreading magnetic anomalies. This basin is an ideal framework to analyze the different rifting and spreading phases, which leads from continental crust to the formation of an oceanic domain through different extensional regimes. To identify the different boundaries during the formation of Powell Basin from the beginning of the rifting until the end of the spreading, we use different data sources: magnetic, gravity, multichannel seismic profiles and bathymetry data. We use seismic and bathymetry data to estimate the Total Tectonic Subsidence. Total Tectonic Subsidence has proven to be useful to delineate the different tectonic regimes present from early rifting to the formation of oceanic seafloor. This result together with magnetic data has been used to delimit the oceanic domain and compare with previous authors’ proposals. This method could be applied in any other basin or margin to help delimiting its boundaries. Finally, we analyze the role that an asthenospheric branch intruding from the Scotia Sea played in the evolution of the magnetic anomaly signature on an oceanic basin. This study has been funded through project RTI 2018–099615-B-100 entitled “Estructura Litosférica y Geodinámica de Powell-Drake-Bransfield Rift” under the umbrella of the Programa Estatal de I + D + i Orientada a los Retos de la Sociedad of the Spanish Ministry of Science. JG, FB, ... |
author2 |
Ministerio de Ciencia e Innovación (España) |
format |
Article in Journal/Newspaper |
author |
Catalán-Morollón, Manuel Martos, Y. M. Galindo Zaldívar, Jesús Pérez, L. F. Bohoyo, Fernando |
spellingShingle |
Catalán-Morollón, Manuel Martos, Y. M. Galindo Zaldívar, Jesús Pérez, L. F. Bohoyo, Fernando Unveiling Powell Basin’s Tectonic Domains and Understanding Its Abnormal Magnetic Anomaly Signature. Is Heat the Key? |
author_facet |
Catalán-Morollón, Manuel Martos, Y. M. Galindo Zaldívar, Jesús Pérez, L. F. Bohoyo, Fernando |
author_sort |
Catalán-Morollón, Manuel |
title |
Unveiling Powell Basin’s Tectonic Domains and Understanding Its Abnormal Magnetic Anomaly Signature. Is Heat the Key? |
title_short |
Unveiling Powell Basin’s Tectonic Domains and Understanding Its Abnormal Magnetic Anomaly Signature. Is Heat the Key? |
title_full |
Unveiling Powell Basin’s Tectonic Domains and Understanding Its Abnormal Magnetic Anomaly Signature. Is Heat the Key? |
title_fullStr |
Unveiling Powell Basin’s Tectonic Domains and Understanding Its Abnormal Magnetic Anomaly Signature. Is Heat the Key? |
title_full_unstemmed |
Unveiling Powell Basin’s Tectonic Domains and Understanding Its Abnormal Magnetic Anomaly Signature. Is Heat the Key? |
title_sort |
unveiling powell basin’s tectonic domains and understanding its abnormal magnetic anomaly signature. is heat the key? |
publisher |
Frontiers Media |
publishDate |
2020 |
url |
http://hdl.handle.net/10261/233386 https://doi.org/10.3389/feart.2020.580675 https://doi.org/10.13039/501100004837 |
long_lat |
ENVELOPE(-49.500,-49.500,-62.250,-62.250) ENVELOPE(-46.500,-46.500,-60.000,-60.000) |
geographic |
Antarctic Antarctic Peninsula Powell Basin Scotia Sea South Scotia Ridge The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Powell Basin Scotia Sea South Scotia Ridge The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Scotia Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Scotia Sea |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CTM 2017–89711-C2-2-P Publisher's version http://dx.doi.org/10.3389/feart.2020.580675 Sí doi:10.3389/feart.2020.580675 issn: 2296-6463 Frontiers in Earth Sciences 8 (2020) http://hdl.handle.net/10261/233386 http://dx.doi.org/10.13039/501100004837 |
op_rights |
open |
op_doi |
https://doi.org/10.3389/feart.2020.58067510.13039/501100004837 |
container_title |
Frontiers in Earth Science |
container_volume |
8 |
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1790593695384338432 |