Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, Argentina

Autores
Carcione, Jose M.; de la Vega, Matias; Gei, Davide; Osella, Ana Maria; Picotti, Stefano; Tassone, Alejandro Alberto; Poscolieri, Maurizio
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A preliminary near-surface seismic survey was carried out at LlancaneloLake (Argentina) with the aim of mapping the quaternary layers, composed of sedi-mentary layers overlying basalt. A geological model has been obtained by interpretingthe events of a common-shot gather. Expressions of the traveltimes of the direct andrefracted waves versus o set provide means to evaluate the velocities of the layers andthickness of the upper layer. Moreover, the standard processing sequence is appliedto the data to obtain a stacked section. This procedure reveals the location of deeperinterfaces, although it is highly a ected by the ltering of the direct and refractedevents, which have the same slope of the medium- and far off set reflection signals.The fact that the direct arrival has not a zero intercept time indicates the pres-ence of a very thin layer at the surface (shallow salt deposits). Further evidence ofthe near-surface layer is that the refracted and reflection events are ringing and thereare strongly dispersive Rayleigh waves. An interface has been found approximately be-tween 54 and 57 m depth. The P- and S-wave velocities of the shallow layer are 2000and 550 m/s, according to the slopes of the direct and Rayleigh waves, respectively,and rock-physics empirical relations, while the lower layer has a P-wave velocity of2800 m/s, obtained from the refracted event. A tentative interpretation of the apexof a reflection event locates the top of the basalt layer at 190 m depth approximately.A viscoelastic model has been de ned, with quality factors of typical volcaniclasticsediments. We then compute a synthetic common-shot gather and snapshots by meansof full-wave pseudospectral methods. The synthetic gather resembles the real one, pro-viding additional support to the interpretation.
Fil: Carcione, Jose M.. Universita Di Roma; Italia;
Fil: de la Vega, Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires; Argentina
Fil: Gei, Davide. Istituto Nazionale di Oceanografía e di Geofisica Sperimentale; Italia
Fil: Osella, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires; Argentina
Fil: Picotti, Stefano. Istituto Nazionale di Oceanografía e di Geofisica Sperimentale; Italia
Fil: Tassone, Alejandro Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
Fil: Poscolieri, Maurizio. Istituto di Acustica e Sensoristica; Italia
Materia
Seismic Processing
Modeling
Waves
Interpretation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/2290
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/2290
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, ArgentinaCarcione, Jose M.de la Vega, MatiasGei, DavideOsella, Ana MariaPicotti, StefanoTassone, Alejandro AlbertoPoscolieri, MaurizioSeismic ProcessingModelingWavesInterpretationhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1A preliminary near-surface seismic survey was carried out at LlancaneloLake (Argentina) with the aim of mapping the quaternary layers, composed of sedi-mentary layers overlying basalt. A geological model has been obtained by interpretingthe events of a common-shot gather. Expressions of the traveltimes of the direct andrefracted waves versus o set provide means to evaluate the velocities of the layers andthickness of the upper layer. Moreover, the standard processing sequence is appliedto the data to obtain a stacked section. This procedure reveals the location of deeperinterfaces, although it is highly a ected by the ltering of the direct and refractedevents, which have the same slope of the medium- and far off set reflection signals.The fact that the direct arrival has not a zero intercept time indicates the pres-ence of a very thin layer at the surface (shallow salt deposits). Further evidence ofthe near-surface layer is that the refracted and reflection events are ringing and thereare strongly dispersive Rayleigh waves. An interface has been found approximately be-tween 54 and 57 m depth. The P- and S-wave velocities of the shallow layer are 2000and 550 m/s, according to the slopes of the direct and Rayleigh waves, respectively,and rock-physics empirical relations, while the lower layer has a P-wave velocity of2800 m/s, obtained from the refracted event. A tentative interpretation of the apexof a reflection event locates the top of the basalt layer at 190 m depth approximately.A viscoelastic model has been de ned, with quality factors of typical volcaniclasticsediments. We then compute a synthetic common-shot gather and snapshots by meansof full-wave pseudospectral methods. The synthetic gather resembles the real one, pro-viding additional support to the interpretation.Fil: Carcione, Jose M.. Universita Di Roma; Italia;Fil: de la Vega, Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires; ArgentinaFil: Gei, Davide. Istituto Nazionale di Oceanografía e di Geofisica Sperimentale; ItaliaFil: Osella, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires; ArgentinaFil: Picotti, Stefano. Istituto Nazionale di Oceanografía e di Geofisica Sperimentale; ItaliaFil: Tassone, Alejandro Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; ArgentinaFil: Poscolieri, Maurizio. Istituto di Acustica e Sensoristica; ItaliaGeophysical Press2013-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/2290Carcione, Jose M.; de la Vega, Matias; Gei, Davide; Osella, Ana Maria; Picotti, Stefano; et al.; Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, Argentina; Geophysical Press; Journal of Seismic Exploration; 22; 1; 2-2013; 1-180963-0651enginfo:eu-repo/semantics/altIdentifier/url/http://www.geophysical-press.com/contents_jse_vol_22_1.htminfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:46:16Zoai:ri.conicet.gov.ar:11336/2290instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:46:16.719CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, Argentina
title Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, Argentina
spellingShingle Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, Argentina
Carcione, Jose M.
Seismic Processing
Modeling
Waves
Interpretation
title_short Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, Argentina
title_full Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, Argentina
title_fullStr Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, Argentina
title_full_unstemmed Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, Argentina
title_sort Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, Argentina
dc.creator.none.fl_str_mv Carcione, Jose M.
de la Vega, Matias
Gei, Davide
Osella, Ana Maria
Picotti, Stefano
Tassone, Alejandro Alberto
Poscolieri, Maurizio
author Carcione, Jose M.
author_facet Carcione, Jose M.
de la Vega, Matias
Gei, Davide
Osella, Ana Maria
Picotti, Stefano
Tassone, Alejandro Alberto
Poscolieri, Maurizio
author_role author
author2 de la Vega, Matias
Gei, Davide
Osella, Ana Maria
Picotti, Stefano
Tassone, Alejandro Alberto
Poscolieri, Maurizio
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Seismic Processing
Modeling
Waves
Interpretation
topic Seismic Processing
Modeling
Waves
Interpretation
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A preliminary near-surface seismic survey was carried out at LlancaneloLake (Argentina) with the aim of mapping the quaternary layers, composed of sedi-mentary layers overlying basalt. A geological model has been obtained by interpretingthe events of a common-shot gather. Expressions of the traveltimes of the direct andrefracted waves versus o set provide means to evaluate the velocities of the layers andthickness of the upper layer. Moreover, the standard processing sequence is appliedto the data to obtain a stacked section. This procedure reveals the location of deeperinterfaces, although it is highly a ected by the ltering of the direct and refractedevents, which have the same slope of the medium- and far off set reflection signals.The fact that the direct arrival has not a zero intercept time indicates the pres-ence of a very thin layer at the surface (shallow salt deposits). Further evidence ofthe near-surface layer is that the refracted and reflection events are ringing and thereare strongly dispersive Rayleigh waves. An interface has been found approximately be-tween 54 and 57 m depth. The P- and S-wave velocities of the shallow layer are 2000and 550 m/s, according to the slopes of the direct and Rayleigh waves, respectively,and rock-physics empirical relations, while the lower layer has a P-wave velocity of2800 m/s, obtained from the refracted event. A tentative interpretation of the apexof a reflection event locates the top of the basalt layer at 190 m depth approximately.A viscoelastic model has been de ned, with quality factors of typical volcaniclasticsediments. We then compute a synthetic common-shot gather and snapshots by meansof full-wave pseudospectral methods. The synthetic gather resembles the real one, pro-viding additional support to the interpretation.
Fil: Carcione, Jose M.. Universita Di Roma; Italia;
Fil: de la Vega, Matias. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires; Argentina
Fil: Gei, Davide. Istituto Nazionale di Oceanografía e di Geofisica Sperimentale; Italia
Fil: Osella, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires; Argentina
Fil: Picotti, Stefano. Istituto Nazionale di Oceanografía e di Geofisica Sperimentale; Italia
Fil: Tassone, Alejandro Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
Fil: Poscolieri, Maurizio. Istituto di Acustica e Sensoristica; Italia
description A preliminary near-surface seismic survey was carried out at LlancaneloLake (Argentina) with the aim of mapping the quaternary layers, composed of sedi-mentary layers overlying basalt. A geological model has been obtained by interpretingthe events of a common-shot gather. Expressions of the traveltimes of the direct andrefracted waves versus o set provide means to evaluate the velocities of the layers andthickness of the upper layer. Moreover, the standard processing sequence is appliedto the data to obtain a stacked section. This procedure reveals the location of deeperinterfaces, although it is highly a ected by the ltering of the direct and refractedevents, which have the same slope of the medium- and far off set reflection signals.The fact that the direct arrival has not a zero intercept time indicates the pres-ence of a very thin layer at the surface (shallow salt deposits). Further evidence ofthe near-surface layer is that the refracted and reflection events are ringing and thereare strongly dispersive Rayleigh waves. An interface has been found approximately be-tween 54 and 57 m depth. The P- and S-wave velocities of the shallow layer are 2000and 550 m/s, according to the slopes of the direct and Rayleigh waves, respectively,and rock-physics empirical relations, while the lower layer has a P-wave velocity of2800 m/s, obtained from the refracted event. A tentative interpretation of the apexof a reflection event locates the top of the basalt layer at 190 m depth approximately.A viscoelastic model has been de ned, with quality factors of typical volcaniclasticsediments. We then compute a synthetic common-shot gather and snapshots by meansof full-wave pseudospectral methods. The synthetic gather resembles the real one, pro-viding additional support to the interpretation.
publishDate 2013
dc.date.none.fl_str_mv 2013-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/2290
Carcione, Jose M.; de la Vega, Matias; Gei, Davide; Osella, Ana Maria; Picotti, Stefano; et al.; Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, Argentina; Geophysical Press; Journal of Seismic Exploration; 22; 1; 2-2013; 1-18
0963-0651
url http://hdl.handle.net/11336/2290
identifier_str_mv Carcione, Jose M.; de la Vega, Matias; Gei, Davide; Osella, Ana Maria; Picotti, Stefano; et al.; Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, Argentina; Geophysical Press; Journal of Seismic Exploration; 22; 1; 2-2013; 1-18
0963-0651
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.geophysical-press.com/contents_jse_vol_22_1.htm
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Geophysical Press
publisher.none.fl_str_mv Geophysical Press
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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