Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 2. Georadar

We have analyzed the ground penetrating radar (GPR) response in several volcanic materials (massive, pahoehoe and aa lava flows and airfall deposits) occurring in the Las Cañadas edifice (Tenerife, Canary Islands), in order to recognize their occurrence and characterize their thickness, spatial dist...

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Autores: Gómez Ortiz, David, Martín Crespo, Tomás, Martín Velázquez, Silvia, Márquez, Álvaro, Lillo, Francisco Javier, López, Iván, Carreño, Francisco
Tipo de recurso: artículo
Fecha de publicación:2005
País:España
Institución:Universidad de Huelva (UHU)
Repositorio:Arias Montano. Repositorio Institucional de la Universidad de Huelva
Idioma:español
OAI Identifier:oai:ariasmontano.uhu.es:10272/8698
Acceso en línea:http://hdl.handle.net/10272/8698
Access Level:acceso abierto
Palabra clave:GPR
Airfall deposits
Lava flows
Tenerife
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spelling Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 2. GeoradarCharacterization of volcanic materials using shallow geophysical techniques: 2. Ground penetrating radarGómez Ortiz, DavidMartín Crespo, TomásMartín Velázquez, SilviaMárquez, ÁlvaroLillo, Francisco JavierLópez, IvánCarreño, FranciscoGPRAirfall depositsLava flowsTenerifeWe have analyzed the ground penetrating radar (GPR) response in several volcanic materials (massive, pahoehoe and aa lava flows and airfall deposits) occurring in the Las Cañadas edifice (Tenerife, Canary Islands), in order to recognize their occurrence and characterize their thickness, spatial distribution, internal structures and discontinuities, as well as to evaluate the mean velocities of the electromagnetic waves in these rocks and deposits. The obtained GPR profiles show that, depending on the nature of the materials, the geometry of the reflectors is distinctive. The GPR reflectors of airfall pumice are thin, well-layered and laterally continuous. In contrast, different lava flows originate a different radar response. Regarding the pahoehoe lava flows, their radar signature is characterized by well defined reflectors. The aa lava flows exhibit weak reflectors. Massive lava flows are resolved as homogeneous structures with scarce or absent internal reflections. The mean velocity of the electromagnetic waves through the different deposits ranges from 0.07 to 0.099 m·ns-1. As a general approximation, the velocity of the electromagnetic waves is faster in lava flows that in airfall deposits, where attenuation is greater and penetration depth is lower. The estimation of the propagation velocity for the electromagnetic waves has allowed us to process the profiles and to carry out depth-time conversions and migration, in order to get more realistic 2-D representationsSociedad Geológica de España20052005-01-0120052005-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10272/8698reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelvainstname:Universidad de Huelva (UHU)Españolspaopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:ariasmontano.uhu.es:10272/86982026-06-02T14:58:11Z
dc.title.none.fl_str_mv Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 2. Georadar
Characterization of volcanic materials using shallow geophysical techniques: 2. Ground penetrating radar
title Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 2. Georadar
spellingShingle Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 2. Georadar
Gómez Ortiz, David
GPR
Airfall deposits
Lava flows
Tenerife
title_short Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 2. Georadar
title_full Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 2. Georadar
title_fullStr Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 2. Georadar
title_full_unstemmed Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 2. Georadar
title_sort Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 2. Georadar
dc.creator.none.fl_str_mv Gómez Ortiz, David
Martín Crespo, Tomás
Martín Velázquez, Silvia
Márquez, Álvaro
Lillo, Francisco Javier
López, Iván
Carreño, Francisco
author Gómez Ortiz, David
author_facet Gómez Ortiz, David
Martín Crespo, Tomás
Martín Velázquez, Silvia
Márquez, Álvaro
Lillo, Francisco Javier
López, Iván
Carreño, Francisco
author_role author
author2 Martín Crespo, Tomás
Martín Velázquez, Silvia
Márquez, Álvaro
Lillo, Francisco Javier
López, Iván
Carreño, Francisco
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv GPR
Airfall deposits
Lava flows
Tenerife
topic GPR
Airfall deposits
Lava flows
Tenerife
description We have analyzed the ground penetrating radar (GPR) response in several volcanic materials (massive, pahoehoe and aa lava flows and airfall deposits) occurring in the Las Cañadas edifice (Tenerife, Canary Islands), in order to recognize their occurrence and characterize their thickness, spatial distribution, internal structures and discontinuities, as well as to evaluate the mean velocities of the electromagnetic waves in these rocks and deposits. The obtained GPR profiles show that, depending on the nature of the materials, the geometry of the reflectors is distinctive. The GPR reflectors of airfall pumice are thin, well-layered and laterally continuous. In contrast, different lava flows originate a different radar response. Regarding the pahoehoe lava flows, their radar signature is characterized by well defined reflectors. The aa lava flows exhibit weak reflectors. Massive lava flows are resolved as homogeneous structures with scarce or absent internal reflections. The mean velocity of the electromagnetic waves through the different deposits ranges from 0.07 to 0.099 m·ns-1. As a general approximation, the velocity of the electromagnetic waves is faster in lava flows that in airfall deposits, where attenuation is greater and penetration depth is lower. The estimation of the propagation velocity for the electromagnetic waves has allowed us to process the profiles and to carry out depth-time conversions and migration, in order to get more realistic 2-D representations
publishDate 2005
dc.date.none.fl_str_mv 2005
2005-01-01
2005
2005-01-01
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 http://hdl.handle.net/10272/8698
url http://hdl.handle.net/10272/8698
dc.language.none.fl_str_mv Español
spa
language_invalid_str_mv Español
language spa
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/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-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Sociedad Geológica de España
publisher.none.fl_str_mv Sociedad Geológica de España
dc.source.none.fl_str_mv reponame:Arias Montano. Repositorio Institucional de la Universidad de Huelva
instname:Universidad de Huelva (UHU)
instname_str Universidad de Huelva (UHU)
reponame_str Arias Montano. Repositorio Institucional de la Universidad de Huelva
collection Arias Montano. Repositorio Institucional de la Universidad de Huelva
repository.name.fl_str_mv
repository.mail.fl_str_mv
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