Structure of the crust and the lithosphere beneath the southern Puna plateau from teleseismic receiver functions

Autores
Heit, B.; Bianchi, M.; Yuan, X.; Kay, S. M.; Sandvol, E.; Kumar, P.; Kind, R.; Alonso, Ricardo Narciso; Brown, L.; Comte, D.
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present a teleseismic P and S receiver function study using data from a temporary passive-source seismic array in the southernmost Puna plateau and adjacent regions. The P receiver function images show the distribution of crustal thickness and Vp/Vs ratio for this area. Over much of the southern Puna plateau, the crustal thickness is 50–55 km, whereas to the west a thicker crust (∼60 to 75 km) is observed beneath much of the Andean volcanic arc region. From the Puna southward, there is little obvious change in the crustal thickness across the border of the plateau (south of 28°S). The crust is seen to progressively thin towards the east in the Pampean Ranges where it is 35–40 km thick. The southern Puna plateau is characterized overall by a low crustal Vp/Vs ratio (less than 1.70), implying a felsic crustal composition. An anomalously high Vp/Vs ratio of 1.87 is observed beneath the Cerro Galan volcanic center, in the region where a prominent crustal low-velocity zone identified below ∼10 km depth probably extends into the lower crust. The crustal thickness determined under the Cerro Galan area (59 km) is close to that of the rest of the southern Puna. The prominent high Vp/Vs ratio and low-velocity zone beneath the Galan region implies the presence of a zone of partial melt or a magma chamber is consistent with hypothesis calling for lithospheric delamination beneath the Galan caldera. A widespread crustal low-velocity layer observed beneath much of the southern Puna, correlates well with crustal low-velocity anomalies observed by teleseismic tomography. The lithosphere–asthenosphere boundary beneath the array can be clearly observed by both P and S receiver functions at depths of 70–90 km in agreement with previous studies suggesting a thin lithosphere beneath the high elevated plateau. The mantle transition zone discontinuities appear at expected depths.
Fil: Heit, B.. Deutsches GeoForschungsZentrum; Alemania
Fil: Bianchi, M.. Deutsches GeoForschungsZentrum; Alemania. Universidade de Sao Paulo; Brasil
Fil: Yuan, X.. Deutsches GeoForschungsZentrum; Alemania
Fil: Kay, S. M.. Cornell University; Estados Unidos
Fil: Sandvol, E.. University Of Missouri; Estados Unidos
Fil: Kumar, P.. Deutsches GeoForschungsZentrum; Alemania. NGRI; India
Fil: Kind, R.. Deutsches GeoForschungsZentrum; Alemania. Freie Universität Berlin; Alemania
Fil: Alonso, Ricardo Narciso. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta; Argentina. Universidad Nacional de Salta; Argentina
Fil: Brown, L.. Cornell University; Estados Unidos
Fil: Comte, D.. Universidad de Chile; Chile
Materia
Andes
Puna
Teleseismic
Crustal
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/7104

id CONICETDig_690302c64beefa1adb5e755034dabd48
oai_identifier_str oai:ri.conicet.gov.ar:11336/7104
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Structure of the crust and the lithosphere beneath the southern Puna plateau from teleseismic receiver functionsHeit, B.Bianchi, M.Yuan, X.Kay, S. M.Sandvol, E.Kumar, P. Kind, R.Alonso, Ricardo NarcisoBrown, L.Comte, D.AndesPunaTeleseismicCrustalhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1We present a teleseismic P and S receiver function study using data from a temporary passive-source seismic array in the southernmost Puna plateau and adjacent regions. The P receiver function images show the distribution of crustal thickness and Vp/Vs ratio for this area. Over much of the southern Puna plateau, the crustal thickness is 50–55 km, whereas to the west a thicker crust (∼60 to 75 km) is observed beneath much of the Andean volcanic arc region. From the Puna southward, there is little obvious change in the crustal thickness across the border of the plateau (south of 28°S). The crust is seen to progressively thin towards the east in the Pampean Ranges where it is 35–40 km thick. The southern Puna plateau is characterized overall by a low crustal Vp/Vs ratio (less than 1.70), implying a felsic crustal composition. An anomalously high Vp/Vs ratio of 1.87 is observed beneath the Cerro Galan volcanic center, in the region where a prominent crustal low-velocity zone identified below ∼10 km depth probably extends into the lower crust. The crustal thickness determined under the Cerro Galan area (59 km) is close to that of the rest of the southern Puna. The prominent high Vp/Vs ratio and low-velocity zone beneath the Galan region implies the presence of a zone of partial melt or a magma chamber is consistent with hypothesis calling for lithospheric delamination beneath the Galan caldera. A widespread crustal low-velocity layer observed beneath much of the southern Puna, correlates well with crustal low-velocity anomalies observed by teleseismic tomography. The lithosphere–asthenosphere boundary beneath the array can be clearly observed by both P and S receiver functions at depths of 70–90 km in agreement with previous studies suggesting a thin lithosphere beneath the high elevated plateau. The mantle transition zone discontinuities appear at expected depths.Fil: Heit, B.. Deutsches GeoForschungsZentrum; AlemaniaFil: Bianchi, M.. Deutsches GeoForschungsZentrum; Alemania. Universidade de Sao Paulo; BrasilFil: Yuan, X.. Deutsches GeoForschungsZentrum; AlemaniaFil: Kay, S. M.. Cornell University; Estados UnidosFil: Sandvol, E.. University Of Missouri; Estados UnidosFil: Kumar, P.. Deutsches GeoForschungsZentrum; Alemania. NGRI; IndiaFil: Kind, R.. Deutsches GeoForschungsZentrum; Alemania. Freie Universität Berlin; AlemaniaFil: Alonso, Ricardo Narciso. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta; Argentina. Universidad Nacional de Salta; ArgentinaFil: Brown, L.. Cornell University; Estados UnidosFil: Comte, D.. Universidad de Chile; ChileElsevier Science2014-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/7104Heit, B.; Bianchi, M.; Yuan, X.; Kay, S. M.; Sandvol, E.; et al.; Structure of the crust and the lithosphere beneath the southern Puna plateau from teleseismic receiver functions; Elsevier Science; Earth and Planetary Science Letters; 385; 1-2014; 1-110012-821Xenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0012821X13005803info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2013.10.017info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:48:48Zoai:ri.conicet.gov.ar:11336/7104instacron: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:34982025-09-29 09:48:48.664CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Structure of the crust and the lithosphere beneath the southern Puna plateau from teleseismic receiver functions
title Structure of the crust and the lithosphere beneath the southern Puna plateau from teleseismic receiver functions
spellingShingle Structure of the crust and the lithosphere beneath the southern Puna plateau from teleseismic receiver functions
Heit, B.
Andes
Puna
Teleseismic
Crustal
title_short Structure of the crust and the lithosphere beneath the southern Puna plateau from teleseismic receiver functions
title_full Structure of the crust and the lithosphere beneath the southern Puna plateau from teleseismic receiver functions
title_fullStr Structure of the crust and the lithosphere beneath the southern Puna plateau from teleseismic receiver functions
title_full_unstemmed Structure of the crust and the lithosphere beneath the southern Puna plateau from teleseismic receiver functions
title_sort Structure of the crust and the lithosphere beneath the southern Puna plateau from teleseismic receiver functions
dc.creator.none.fl_str_mv Heit, B.
Bianchi, M.
Yuan, X.
Kay, S. M.
Sandvol, E.
Kumar, P.
Kind, R.
Alonso, Ricardo Narciso
Brown, L.
Comte, D.
author Heit, B.
author_facet Heit, B.
Bianchi, M.
Yuan, X.
Kay, S. M.
Sandvol, E.
Kumar, P.
Kind, R.
Alonso, Ricardo Narciso
Brown, L.
Comte, D.
author_role author
author2 Bianchi, M.
Yuan, X.
Kay, S. M.
Sandvol, E.
Kumar, P.
Kind, R.
Alonso, Ricardo Narciso
Brown, L.
Comte, D.
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Andes
Puna
Teleseismic
Crustal
topic Andes
Puna
Teleseismic
Crustal
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present a teleseismic P and S receiver function study using data from a temporary passive-source seismic array in the southernmost Puna plateau and adjacent regions. The P receiver function images show the distribution of crustal thickness and Vp/Vs ratio for this area. Over much of the southern Puna plateau, the crustal thickness is 50–55 km, whereas to the west a thicker crust (∼60 to 75 km) is observed beneath much of the Andean volcanic arc region. From the Puna southward, there is little obvious change in the crustal thickness across the border of the plateau (south of 28°S). The crust is seen to progressively thin towards the east in the Pampean Ranges where it is 35–40 km thick. The southern Puna plateau is characterized overall by a low crustal Vp/Vs ratio (less than 1.70), implying a felsic crustal composition. An anomalously high Vp/Vs ratio of 1.87 is observed beneath the Cerro Galan volcanic center, in the region where a prominent crustal low-velocity zone identified below ∼10 km depth probably extends into the lower crust. The crustal thickness determined under the Cerro Galan area (59 km) is close to that of the rest of the southern Puna. The prominent high Vp/Vs ratio and low-velocity zone beneath the Galan region implies the presence of a zone of partial melt or a magma chamber is consistent with hypothesis calling for lithospheric delamination beneath the Galan caldera. A widespread crustal low-velocity layer observed beneath much of the southern Puna, correlates well with crustal low-velocity anomalies observed by teleseismic tomography. The lithosphere–asthenosphere boundary beneath the array can be clearly observed by both P and S receiver functions at depths of 70–90 km in agreement with previous studies suggesting a thin lithosphere beneath the high elevated plateau. The mantle transition zone discontinuities appear at expected depths.
Fil: Heit, B.. Deutsches GeoForschungsZentrum; Alemania
Fil: Bianchi, M.. Deutsches GeoForschungsZentrum; Alemania. Universidade de Sao Paulo; Brasil
Fil: Yuan, X.. Deutsches GeoForschungsZentrum; Alemania
Fil: Kay, S. M.. Cornell University; Estados Unidos
Fil: Sandvol, E.. University Of Missouri; Estados Unidos
Fil: Kumar, P.. Deutsches GeoForschungsZentrum; Alemania. NGRI; India
Fil: Kind, R.. Deutsches GeoForschungsZentrum; Alemania. Freie Universität Berlin; Alemania
Fil: Alonso, Ricardo Narciso. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta; Argentina. Universidad Nacional de Salta; Argentina
Fil: Brown, L.. Cornell University; Estados Unidos
Fil: Comte, D.. Universidad de Chile; Chile
description We present a teleseismic P and S receiver function study using data from a temporary passive-source seismic array in the southernmost Puna plateau and adjacent regions. The P receiver function images show the distribution of crustal thickness and Vp/Vs ratio for this area. Over much of the southern Puna plateau, the crustal thickness is 50–55 km, whereas to the west a thicker crust (∼60 to 75 km) is observed beneath much of the Andean volcanic arc region. From the Puna southward, there is little obvious change in the crustal thickness across the border of the plateau (south of 28°S). The crust is seen to progressively thin towards the east in the Pampean Ranges where it is 35–40 km thick. The southern Puna plateau is characterized overall by a low crustal Vp/Vs ratio (less than 1.70), implying a felsic crustal composition. An anomalously high Vp/Vs ratio of 1.87 is observed beneath the Cerro Galan volcanic center, in the region where a prominent crustal low-velocity zone identified below ∼10 km depth probably extends into the lower crust. The crustal thickness determined under the Cerro Galan area (59 km) is close to that of the rest of the southern Puna. The prominent high Vp/Vs ratio and low-velocity zone beneath the Galan region implies the presence of a zone of partial melt or a magma chamber is consistent with hypothesis calling for lithospheric delamination beneath the Galan caldera. A widespread crustal low-velocity layer observed beneath much of the southern Puna, correlates well with crustal low-velocity anomalies observed by teleseismic tomography. The lithosphere–asthenosphere boundary beneath the array can be clearly observed by both P and S receiver functions at depths of 70–90 km in agreement with previous studies suggesting a thin lithosphere beneath the high elevated plateau. The mantle transition zone discontinuities appear at expected depths.
publishDate 2014
dc.date.none.fl_str_mv 2014-01
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/11336/7104
Heit, B.; Bianchi, M.; Yuan, X.; Kay, S. M.; Sandvol, E.; et al.; Structure of the crust and the lithosphere beneath the southern Puna plateau from teleseismic receiver functions; Elsevier Science; Earth and Planetary Science Letters; 385; 1-2014; 1-11
0012-821X
url http://hdl.handle.net/11336/7104
identifier_str_mv Heit, B.; Bianchi, M.; Yuan, X.; Kay, S. M.; Sandvol, E.; et al.; Structure of the crust and the lithosphere beneath the southern Puna plateau from teleseismic receiver functions; Elsevier Science; Earth and Planetary Science Letters; 385; 1-2014; 1-11
0012-821X
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0012821X13005803
info:eu-repo/semantics/altIdentifier/doi/
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2013.10.017
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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
_version_ 1844613514015014912
score 13.070432