Crustal thickness variations in northern Morocco
During the TopoIberia experiment, a total of 26 seismic broadband stations were recording in northern Morocco, providing for the first time extended regional coverage for investigating structure and seismotectonics of the southern branch of the Betic-Rif arc, its foreland, and the Atlas domain. Here...
| Autores: | , , , , , , , , , , |
|---|---|
| Tipo de documento: | artigo |
| Data de publicação: | 2012 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositório: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/277016 |
| Acesso em linha: | http://hdl.handle.net/10261/277016 https://doi.org/10.1029/2011JB008608 |
| Access Level: | Acceso aberto |
| Palavra-chave: | engrosamiento corteza sismotectónica Cordilleras Béticas Rif señal telesísmica Arco de Gibraltar Mar de Alborán Dominio Atlas Marruecos España Marruecos |
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Crustal thickness variations in northern MoroccoMancilla, Flor de LisStich, DanielMorales, JoséJulià, JordiDíaz, JordiPazos, AntonioCórdoba, DiegoPulgar, Javier A.Ibarra Torre, PedroHarnafi, MimounGonzález Lodeiro, Franciscoengrosamiento cortezasismotectónicaCordilleras BéticasRifseñal telesísmicaArco de GibraltarMar de AlboránDominio Atlas MarruecosEspañaMarruecosDuring the TopoIberia experiment, a total of 26 seismic broadband stations were recording in northern Morocco, providing for the first time extended regional coverage for investigating structure and seismotectonics of the southern branch of the Betic-Rif arc, its foreland, and the Atlas domain. Here, we analyze P-to-S converted waves in teleseismic receiver functions to infer gross crustal properties as thickness and Vp/Vs ratio. Strong lateral variations of the crustal thickness are observed throughout the region. Crustal thicknesses vary between 22 and 44 km and display a simple geographic pattern that divides the study area into three domains: entire northwestern Morocco underlain by a thickened crust with crustal thicknesses between 35 and 44 km; northeastern Morocco affected by significant crustal thinning, with crustal thicknesses ranging from 22 to 30 km, with the shallowest Moho along the Mediterranean coast; and an extended domain of 27–34 km thick crust, farther south which includes the Atlas domain and its foreland regions. Vp/Vs ratios show normal values of 1.75 for most stations except for the Atlas domain, where several stations give low Vp/Vs ratios of around 1.71. The very sharp transition from thick crust in northwestern Morocco to thin crust in northeastern Morocco is attributed to regional geodynamics, possibly the realm of present-day subcrustal dynamics in the final stage of western Mediterranean subduction. Crustal thicknesses just slightly above 30 km in the southern domain are intriguing, showing that high topography in this region is not isostatically compensated at crustal level.Instituto Andaluz de Geofísica, Universidad de Granada, EspañaDepartamento de Física Teórica y del Cosmos, Universidad de Granada, EspañaDepartamento de Geofisica, Universidade Federal do Rio Grande do Norte, BrasilPrograma de Pós-graduacão em Geodinâmica e Geofísica, Universidade Federal do Rio Grande do Norte, BrasilInstituto de Ciencias de la Tierra Jaume Almera, EspañaReal Observatorio de La Armada, EspañaDepartamento de Geofísica, Universidad Complutense de Madrid, EspañaDepartamento de Geología, Universidad de Oviedo, EspañaInstituto Geológico y Minero de España, EspañaInstitut Scientifique, Université Mohammed V, MarruecosDepartamento de Geodinámica, Universidad de Granada, EspañaAmerican Geophysical UnionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/277016https://doi.org/10.1029/2011JB008608reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#CSD2006-00041CGL2006-01171CGL2008-01830P09-RNM-5100https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2011JB008608Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2770162026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
Crustal thickness variations in northern Morocco |
| title |
Crustal thickness variations in northern Morocco |
| spellingShingle |
Crustal thickness variations in northern Morocco Mancilla, Flor de Lis engrosamiento corteza sismotectónica Cordilleras Béticas Rif señal telesísmica Arco de Gibraltar Mar de Alborán Dominio Atlas Marruecos España Marruecos |
| title_short |
Crustal thickness variations in northern Morocco |
| title_full |
Crustal thickness variations in northern Morocco |
| title_fullStr |
Crustal thickness variations in northern Morocco |
| title_full_unstemmed |
Crustal thickness variations in northern Morocco |
| title_sort |
Crustal thickness variations in northern Morocco |
| dc.creator.none.fl_str_mv |
Mancilla, Flor de Lis Stich, Daniel Morales, José Julià, Jordi Díaz, Jordi Pazos, Antonio Córdoba, Diego Pulgar, Javier A. Ibarra Torre, Pedro Harnafi, Mimoun González Lodeiro, Francisco |
| author |
Mancilla, Flor de Lis |
| author_facet |
Mancilla, Flor de Lis Stich, Daniel Morales, José Julià, Jordi Díaz, Jordi Pazos, Antonio Córdoba, Diego Pulgar, Javier A. Ibarra Torre, Pedro Harnafi, Mimoun González Lodeiro, Francisco |
| author_role |
author |
| author2 |
Stich, Daniel Morales, José Julià, Jordi Díaz, Jordi Pazos, Antonio Córdoba, Diego Pulgar, Javier A. Ibarra Torre, Pedro Harnafi, Mimoun González Lodeiro, Francisco |
| author2_role |
author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
engrosamiento corteza sismotectónica Cordilleras Béticas Rif señal telesísmica Arco de Gibraltar Mar de Alborán Dominio Atlas Marruecos España Marruecos |
| topic |
engrosamiento corteza sismotectónica Cordilleras Béticas Rif señal telesísmica Arco de Gibraltar Mar de Alborán Dominio Atlas Marruecos España Marruecos |
| description |
During the TopoIberia experiment, a total of 26 seismic broadband stations were recording in northern Morocco, providing for the first time extended regional coverage for investigating structure and seismotectonics of the southern branch of the Betic-Rif arc, its foreland, and the Atlas domain. Here, we analyze P-to-S converted waves in teleseismic receiver functions to infer gross crustal properties as thickness and Vp/Vs ratio. Strong lateral variations of the crustal thickness are observed throughout the region. Crustal thicknesses vary between 22 and 44 km and display a simple geographic pattern that divides the study area into three domains: entire northwestern Morocco underlain by a thickened crust with crustal thicknesses between 35 and 44 km; northeastern Morocco affected by significant crustal thinning, with crustal thicknesses ranging from 22 to 30 km, with the shallowest Moho along the Mediterranean coast; and an extended domain of 27–34 km thick crust, farther south which includes the Atlas domain and its foreland regions. Vp/Vs ratios show normal values of 1.75 for most stations except for the Atlas domain, where several stations give low Vp/Vs ratios of around 1.71. The very sharp transition from thick crust in northwestern Morocco to thin crust in northeastern Morocco is attributed to regional geodynamics, possibly the realm of present-day subcrustal dynamics in the final stage of western Mediterranean subduction. Crustal thicknesses just slightly above 30 km in the southern domain are intriguing, showing that high topography in this region is not isostatically compensated at crustal level. |
| publishDate |
2012 |
| dc.date.none.fl_str_mv |
2012 2022 2022 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 |
| format |
article |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/277016 https://doi.org/10.1029/2011JB008608 |
| url |
http://hdl.handle.net/10261/277016 https://doi.org/10.1029/2011JB008608 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
#PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# CSD2006-00041 CGL2006-01171 CGL2008-01830 P09-RNM-5100 https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2011JB008608 Sí |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess |
| eu_rights_str_mv |
openAccess |
| dc.publisher.none.fl_str_mv |
American Geophysical Union |
| publisher.none.fl_str_mv |
American Geophysical Union |
| dc.source.none.fl_str_mv |
reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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Consejo Superior de Investigaciones Científicas (CSIC) |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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1869408145202216960 |
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15,811543 |