Estimation of the depth of faulting in the northwest margin of Argyre basin (Mars) by structural analysis of lobate scarps

Lobate scarps are tectonic structures considered as the topographic expression of thrust faults. For this study we have chosen three large lobate scarps (Ogygis Rupes, Bosporos Rupes and a third unnamed one) located in Aonia Terra, in the southern hemisphere of Mars near the northwest margin of the...

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Detalles Bibliográficos
Autores: Herrero Gil, Andrea, Ruiz Pérez, Javier, Egea González, Isabel, Romeo Briones, Ignacio
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/18606
Acceso en línea:https://hdl.handle.net/20.500.14352/18606
Access Level:acceso abierto
Palabra clave:551.2/.3
Geodinámica
2507 Geofísica
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spelling Estimation of the depth of faulting in the northwest margin of Argyre basin (Mars) by structural analysis of lobate scarpsHerrero Gil, AndreaRuiz Pérez, JavierEgea González, IsabelRomeo Briones, Ignacio551.2/.3Geodinámica2507 GeofísicaLobate scarps are tectonic structures considered as the topographic expression of thrust faults. For this study we have chosen three large lobate scarps (Ogygis Rupes, Bosporos Rupes and a third unnamed one) located in Aonia Terra, in the southern hemisphere of Mars near the northwest margin of the Argyre impact basin. These lobate scarps strike parallel to the edge of Thaumasia in this area, showing a roughly arcuate to linear form and an asymmetric cross section with a steeply frontal scarp and a gently dipping back scarp. The asymmetry in the cross sections suggests that the three lobate scarps were generated by ESE-vergent thrust faults. Two complementary methods were used to analyze the faults underlying these lobate scarps based on Mars Orbiter Laser Altimeter data and the Mars imagery available: (i) analyzing topographic profiles together with the horizontal shortening estimations from cross-cut craters to create balanced cross sections on the basis of thrust fault propagation folding [1]; (ii) using a forward mechanical dislocation method [2], which predicts fault geometry by comparing model outputs with real topography. The objective is to obtain fault geometry parameters as the minimum value for the horizontal offset, dip angle and depth of faulting of each underlying fault. By comparing the results obtained by both methods we estimate a preliminary depth of faulting value between 15 and 26 kilometers for this zone between Thaumasia and Argyre basin. The significant sizes of the faults underlying these three lobate scarps suggest that their detachments are located at a main rheological change. Estimates of the depth of faulting in similar lobate scarps on Mars or Mercury [3] have been associated with the depth of the brittle-ductile transition.EGU General AssemblyUniversidad Complutense de Madrid20172017-01-0120172017-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/18606reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/186062026-06-02T12:44:21Z
dc.title.none.fl_str_mv Estimation of the depth of faulting in the northwest margin of Argyre basin (Mars) by structural analysis of lobate scarps
title Estimation of the depth of faulting in the northwest margin of Argyre basin (Mars) by structural analysis of lobate scarps
spellingShingle Estimation of the depth of faulting in the northwest margin of Argyre basin (Mars) by structural analysis of lobate scarps
Herrero Gil, Andrea
551.2/.3
Geodinámica
2507 Geofísica
title_short Estimation of the depth of faulting in the northwest margin of Argyre basin (Mars) by structural analysis of lobate scarps
title_full Estimation of the depth of faulting in the northwest margin of Argyre basin (Mars) by structural analysis of lobate scarps
title_fullStr Estimation of the depth of faulting in the northwest margin of Argyre basin (Mars) by structural analysis of lobate scarps
title_full_unstemmed Estimation of the depth of faulting in the northwest margin of Argyre basin (Mars) by structural analysis of lobate scarps
title_sort Estimation of the depth of faulting in the northwest margin of Argyre basin (Mars) by structural analysis of lobate scarps
dc.creator.none.fl_str_mv Herrero Gil, Andrea
Ruiz Pérez, Javier
Egea González, Isabel
Romeo Briones, Ignacio
author Herrero Gil, Andrea
author_facet Herrero Gil, Andrea
Ruiz Pérez, Javier
Egea González, Isabel
Romeo Briones, Ignacio
author_role author
author2 Ruiz Pérez, Javier
Egea González, Isabel
Romeo Briones, Ignacio
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 551.2/.3
Geodinámica
2507 Geofísica
topic 551.2/.3
Geodinámica
2507 Geofísica
description Lobate scarps are tectonic structures considered as the topographic expression of thrust faults. For this study we have chosen three large lobate scarps (Ogygis Rupes, Bosporos Rupes and a third unnamed one) located in Aonia Terra, in the southern hemisphere of Mars near the northwest margin of the Argyre impact basin. These lobate scarps strike parallel to the edge of Thaumasia in this area, showing a roughly arcuate to linear form and an asymmetric cross section with a steeply frontal scarp and a gently dipping back scarp. The asymmetry in the cross sections suggests that the three lobate scarps were generated by ESE-vergent thrust faults. Two complementary methods were used to analyze the faults underlying these lobate scarps based on Mars Orbiter Laser Altimeter data and the Mars imagery available: (i) analyzing topographic profiles together with the horizontal shortening estimations from cross-cut craters to create balanced cross sections on the basis of thrust fault propagation folding [1]; (ii) using a forward mechanical dislocation method [2], which predicts fault geometry by comparing model outputs with real topography. The objective is to obtain fault geometry parameters as the minimum value for the horizontal offset, dip angle and depth of faulting of each underlying fault. By comparing the results obtained by both methods we estimate a preliminary depth of faulting value between 15 and 26 kilometers for this zone between Thaumasia and Argyre basin. The significant sizes of the faults underlying these three lobate scarps suggest that their detachments are located at a main rheological change. Estimates of the depth of faulting in similar lobate scarps on Mars or Mercury [3] have been associated with the depth of the brittle-ductile transition.
publishDate 2017
dc.date.none.fl_str_mv 2017
2017-01-01
2017
2017-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/18606
url https://hdl.handle.net/20.500.14352/18606
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 3.0 España
https://creativecommons.org/licenses/by/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 3.0 España
https://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EGU General Assembly
publisher.none.fl_str_mv EGU General Assembly
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.198674

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