Shallow structure beneath the central volcanic complex of Tenerife from new gravity data: implications for its evolution and recent reactivation

We present a new local Bouguer anomaly map of the Central Volcanic Complex (CVC) of Tenerife, Spain, constructed from the amalgamation of 323 new high precision gravity measurements with existing gravity data from 361 observations. The new anomaly map images the high-density core of the CVC and the...

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Detalles Bibliográficos
Autores: Gottsmann, Joachim, Camacho, Antonio G., Martí Molist, Joan, Wooller, Luke K., Fernández Torres, José, García García, Alicia, Rymer, Hazel
Tipo de recurso: artículo
Fecha de publicación:2008
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::d8bc803b468fd71c0aed28dd0a47e330
Acceso en línea:http://hdl.handle.net/10261/34275
Access Level:acceso abierto
Palabra clave:Gravity
Structure
Caldera
Tenerife
Volcanic ocean island
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spelling Shallow structure beneath the central volcanic complex of Tenerife from new gravity data: implications for its evolution and recent reactivationGottsmann, JoachimCamacho, Antonio G.Martí Molist, JoanWooller, Luke K.Fernández Torres, JoséGarcía García, AliciaRymer, HazelGravityStructureCalderaTenerifeVolcanic ocean islandWe present a new local Bouguer anomaly map of the Central Volcanic Complex (CVC) of Tenerife, Spain, constructed from the amalgamation of 323 new high precision gravity measurements with existing gravity data from 361 observations. The new anomaly map images the high-density core of the CVC and the pronounced gravity low centred in the Las Cañadas caldera in greater detail than previously available. Mathematical construction of a sub-surface model from the local anomaly data, employing a 3D inversion based on “growing” the sub-surface density distribution via the aggregation of cells, enables mapping of the shallow structure beneath the complex, giving unprecedented insights into the sub-surface architecture. We find the resultant density distribution in agreement with geological and other geophysical data. The modelled sub-surface structure supports a vertical collapse origin of the caldera, and maps the headwall of the ca. 180 ka Icod landslide, which appears to lie buried beneath the Pico Viejo–Pico Teide stratovolcanic complex. The results allow us to put into context the recorded ground deformation and gravity changes at the CVC during its reactivation in spring 2004 in relation to its dominant structural building blocks. For example, the areas undergoing the most significant changes at depth in recent years are underlain by low-density material and are aligned along long-standing structural entities, which have shaped this volcanic ocean island over the past few million years.Peer reviewedElsevier201120112008info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/34275reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Españolhttp://dx.doi.org/10.1016/j.pepi.2008.06.020info:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::d8bc803b468fd71c0aed28dd0a47e3302026-05-22T06:33:51Z
dc.title.none.fl_str_mv Shallow structure beneath the central volcanic complex of Tenerife from new gravity data: implications for its evolution and recent reactivation
title Shallow structure beneath the central volcanic complex of Tenerife from new gravity data: implications for its evolution and recent reactivation
spellingShingle Shallow structure beneath the central volcanic complex of Tenerife from new gravity data: implications for its evolution and recent reactivation
Gottsmann, Joachim
Gravity
Structure
Caldera
Tenerife
Volcanic ocean island
title_short Shallow structure beneath the central volcanic complex of Tenerife from new gravity data: implications for its evolution and recent reactivation
title_full Shallow structure beneath the central volcanic complex of Tenerife from new gravity data: implications for its evolution and recent reactivation
title_fullStr Shallow structure beneath the central volcanic complex of Tenerife from new gravity data: implications for its evolution and recent reactivation
title_full_unstemmed Shallow structure beneath the central volcanic complex of Tenerife from new gravity data: implications for its evolution and recent reactivation
title_sort Shallow structure beneath the central volcanic complex of Tenerife from new gravity data: implications for its evolution and recent reactivation
dc.creator.none.fl_str_mv Gottsmann, Joachim
Camacho, Antonio G.
Martí Molist, Joan
Wooller, Luke K.
Fernández Torres, José
García García, Alicia
Rymer, Hazel
author Gottsmann, Joachim
author_facet Gottsmann, Joachim
Camacho, Antonio G.
Martí Molist, Joan
Wooller, Luke K.
Fernández Torres, José
García García, Alicia
Rymer, Hazel
author_role author
author2 Camacho, Antonio G.
Martí Molist, Joan
Wooller, Luke K.
Fernández Torres, José
García García, Alicia
Rymer, Hazel
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Gravity
Structure
Caldera
Tenerife
Volcanic ocean island
topic Gravity
Structure
Caldera
Tenerife
Volcanic ocean island
description We present a new local Bouguer anomaly map of the Central Volcanic Complex (CVC) of Tenerife, Spain, constructed from the amalgamation of 323 new high precision gravity measurements with existing gravity data from 361 observations. The new anomaly map images the high-density core of the CVC and the pronounced gravity low centred in the Las Cañadas caldera in greater detail than previously available. Mathematical construction of a sub-surface model from the local anomaly data, employing a 3D inversion based on “growing” the sub-surface density distribution via the aggregation of cells, enables mapping of the shallow structure beneath the complex, giving unprecedented insights into the sub-surface architecture. We find the resultant density distribution in agreement with geological and other geophysical data. The modelled sub-surface structure supports a vertical collapse origin of the caldera, and maps the headwall of the ca. 180 ka Icod landslide, which appears to lie buried beneath the Pico Viejo–Pico Teide stratovolcanic complex. The results allow us to put into context the recorded ground deformation and gravity changes at the CVC during its reactivation in spring 2004 in relation to its dominant structural building blocks. For example, the areas undergoing the most significant changes at depth in recent years are underlain by low-density material and are aligned along long-standing structural entities, which have shaped this volcanic ocean island over the past few million years.
publishDate 2008
dc.date.none.fl_str_mv 2008
2011
2011
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/10261/34275
url http://hdl.handle.net/10261/34275
dc.language.none.fl_str_mv Español
language_invalid_str_mv Español
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.pepi.2008.06.020
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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