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dc.contributor.author
Carcione, Jose M.
dc.contributor.author
de la Vega, Matias
dc.contributor.author
Gei, Davide
dc.contributor.author
Osella, Ana Maria
dc.contributor.author
Picotti, Stefano
dc.contributor.author
Tassone, Alejandro Alberto
dc.contributor.author
Poscolieri, Maurizio
dc.date.available
2015-10-02T20:01:00Z
dc.date.issued
2013-02
dc.identifier.citation
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
dc.identifier.issn
0963-0651
dc.identifier.uri
http://hdl.handle.net/11336/2290
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Geophysical Press
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Seismic Processing
dc.subject
Modeling
dc.subject
Waves
dc.subject
Interpretation
dc.subject.classification
Geoquímica y Geofísica
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
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Geología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Seismic characterization of the Quaternary sediments at Llancanelo-Lake Area, Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-03-30 10:35:44.97925-03
dc.journal.volume
22
dc.journal.number
1
dc.journal.pagination
1-18
dc.journal.pais
Esp
dc.journal.ciudad
Benahavis
dc.description.fil
Fil: Carcione, Jose M.. Istituto Nazionale di Oceanografía e di Geofisica Sperimentale; Italia; Universita Di Roma; Italia;
dc.description.fil
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;
dc.description.fil
Fil: Gei, Davide. Istituto Nazionale di Oceanografía e di Geofisica Sperimentale; Italia;
dc.description.fil
Fil: Osella, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires; Argentina;
dc.description.fil
Fil: Picotti, Stefano. Istituto Nazionale di Oceanografía e di Geofisica Sperimentale; Italia;
dc.description.fil
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;
dc.description.fil
Fil: Poscolieri, Maurizio. Istituto di Acustica e Sensoristica; Italia;
dc.journal.title
Journal of Seismic Exploration
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.geophysical-press.com/contents_jse_vol_22_1.htm


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  • Articulos(IFIBA) [1565]
    Articulos de INST.DE FISICA DE BUENOS AIRES
  • Articulos(IGEBA) [444]
    Articulos de INSTITUTO DE GEOCIENCIAS BASICAS, APLICADAS Y AMBIENTALES DE BS. AS

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