New geophysical evidences of the presence of a buried caldera in Laguna Pozuelos, Northern Puna

Autores
Prezzi, C.B.; Lince Klinger, F.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In the southern border of Laguna de Pozuelos Basin, the Pan de Azúcar volcanic complex crops out. It consists of several dacitic volcanic dome centers of ~ 12 Ma. Previous interpretation of seismic lines and a detailed ground magnetic survey indicated the presence of buried intrusive bodies. The determination of the existence of buried bodies has two major implications: 1) these volcanic complexes are closely associated with ore deposits (as part of the Bolivian tin ore polymetallic belt); and 2) the existence of a large ancient caldera (~12 Ma) beneath the central and southern part of the Laguna de Pozuelos Basin, covered by the infilling sediments was previously suggested. The volcanic complexes would represent the final stages of such a calderic magmatic system. In order to confirm the existence of other buried intrusives and/or a buried caldera system, detailed ground magnetic and gravity surveys were carried out. The magnetic map is dominated by positive and negative anomalies in the southern sector of the basin, associated with the dacitic domes. The residual Bouguer anomaly presents a semicircular pattern, having only positive values. We applied the curvature technique to analyse the magnetic and gravity signals and used Euler deconvolution to estimate the depth to the sources. Our results would support the hypothesis of a large caldera buried beneath the Laguna de Pozuelos Basin. The identification of such a large Middle Miocene caldera would bring new insight into the magmatic evolution of the northern Puna.
Fil:Prezzi, C.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente
Rev. Asoc. Geol. Argent. 2010;66(1-2):282-295
Materia
Caldera system
Gravity and magnetic anomalies
Middle Miocene
Northern Puna
Bouguer anomaly
caldera
dacite
dome
gravity anomaly
magnetic anomaly
magnetic survey
Miocene
Argentina
Jujuy
Pozuelos Lake
Puna
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/2.5/ar
Repositorio
Biblioteca Digital (UBA-FCEN)
Institución
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador
paperaa:paper_00044822_v66_n1-2_p282_Prezzi

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oai_identifier_str paperaa:paper_00044822_v66_n1-2_p282_Prezzi
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repository_id_str 1896
network_name_str Biblioteca Digital (UBA-FCEN)
spelling New geophysical evidences of the presence of a buried caldera in Laguna Pozuelos, Northern Puna Prezzi, C.B.Lince Klinger, F.Caldera systemGravity and magnetic anomaliesMiddle MioceneNorthern PunaBouguer anomalycalderadacitedomegravity anomalymagnetic anomalymagnetic surveyMioceneArgentinaJujuyPozuelos LakePunaIn the southern border of Laguna de Pozuelos Basin, the Pan de Azúcar volcanic complex crops out. It consists of several dacitic volcanic dome centers of ~ 12 Ma. Previous interpretation of seismic lines and a detailed ground magnetic survey indicated the presence of buried intrusive bodies. The determination of the existence of buried bodies has two major implications: 1) these volcanic complexes are closely associated with ore deposits (as part of the Bolivian tin ore polymetallic belt); and 2) the existence of a large ancient caldera (~12 Ma) beneath the central and southern part of the Laguna de Pozuelos Basin, covered by the infilling sediments was previously suggested. The volcanic complexes would represent the final stages of such a calderic magmatic system. In order to confirm the existence of other buried intrusives and/or a buried caldera system, detailed ground magnetic and gravity surveys were carried out. The magnetic map is dominated by positive and negative anomalies in the southern sector of the basin, associated with the dacitic domes. The residual Bouguer anomaly presents a semicircular pattern, having only positive values. We applied the curvature technique to analyse the magnetic and gravity signals and used Euler deconvolution to estimate the depth to the sources. Our results would support the hypothesis of a large caldera buried beneath the Laguna de Pozuelos Basin. The identification of such a large Middle Miocene caldera would bring new insight into the magmatic evolution of the northern Puna.Fil:Prezzi, C.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_00044822_v66_n1-2_p282_PrezziRev. Asoc. Geol. Argent. 2010;66(1-2):282-295reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2025-09-04T09:48:40Zpaperaa:paper_00044822_v66_n1-2_p282_PrezziInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962025-09-04 09:48:42.934Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv New geophysical evidences of the presence of a buried caldera in Laguna Pozuelos, Northern Puna
title New geophysical evidences of the presence of a buried caldera in Laguna Pozuelos, Northern Puna
spellingShingle New geophysical evidences of the presence of a buried caldera in Laguna Pozuelos, Northern Puna
Prezzi, C.B.
Caldera system
Gravity and magnetic anomalies
Middle Miocene
Northern Puna
Bouguer anomaly
caldera
dacite
dome
gravity anomaly
magnetic anomaly
magnetic survey
Miocene
Argentina
Jujuy
Pozuelos Lake
Puna
title_short New geophysical evidences of the presence of a buried caldera in Laguna Pozuelos, Northern Puna
title_full New geophysical evidences of the presence of a buried caldera in Laguna Pozuelos, Northern Puna
title_fullStr New geophysical evidences of the presence of a buried caldera in Laguna Pozuelos, Northern Puna
title_full_unstemmed New geophysical evidences of the presence of a buried caldera in Laguna Pozuelos, Northern Puna
title_sort New geophysical evidences of the presence of a buried caldera in Laguna Pozuelos, Northern Puna
dc.creator.none.fl_str_mv Prezzi, C.B.
Lince Klinger, F.
author Prezzi, C.B.
author_facet Prezzi, C.B.
Lince Klinger, F.
author_role author
author2 Lince Klinger, F.
author2_role author
dc.subject.none.fl_str_mv Caldera system
Gravity and magnetic anomalies
Middle Miocene
Northern Puna
Bouguer anomaly
caldera
dacite
dome
gravity anomaly
magnetic anomaly
magnetic survey
Miocene
Argentina
Jujuy
Pozuelos Lake
Puna
topic Caldera system
Gravity and magnetic anomalies
Middle Miocene
Northern Puna
Bouguer anomaly
caldera
dacite
dome
gravity anomaly
magnetic anomaly
magnetic survey
Miocene
Argentina
Jujuy
Pozuelos Lake
Puna
dc.description.none.fl_txt_mv In the southern border of Laguna de Pozuelos Basin, the Pan de Azúcar volcanic complex crops out. It consists of several dacitic volcanic dome centers of ~ 12 Ma. Previous interpretation of seismic lines and a detailed ground magnetic survey indicated the presence of buried intrusive bodies. The determination of the existence of buried bodies has two major implications: 1) these volcanic complexes are closely associated with ore deposits (as part of the Bolivian tin ore polymetallic belt); and 2) the existence of a large ancient caldera (~12 Ma) beneath the central and southern part of the Laguna de Pozuelos Basin, covered by the infilling sediments was previously suggested. The volcanic complexes would represent the final stages of such a calderic magmatic system. In order to confirm the existence of other buried intrusives and/or a buried caldera system, detailed ground magnetic and gravity surveys were carried out. The magnetic map is dominated by positive and negative anomalies in the southern sector of the basin, associated with the dacitic domes. The residual Bouguer anomaly presents a semicircular pattern, having only positive values. We applied the curvature technique to analyse the magnetic and gravity signals and used Euler deconvolution to estimate the depth to the sources. Our results would support the hypothesis of a large caldera buried beneath the Laguna de Pozuelos Basin. The identification of such a large Middle Miocene caldera would bring new insight into the magmatic evolution of the northern Puna.
Fil:Prezzi, C.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
description In the southern border of Laguna de Pozuelos Basin, the Pan de Azúcar volcanic complex crops out. It consists of several dacitic volcanic dome centers of ~ 12 Ma. Previous interpretation of seismic lines and a detailed ground magnetic survey indicated the presence of buried intrusive bodies. The determination of the existence of buried bodies has two major implications: 1) these volcanic complexes are closely associated with ore deposits (as part of the Bolivian tin ore polymetallic belt); and 2) the existence of a large ancient caldera (~12 Ma) beneath the central and southern part of the Laguna de Pozuelos Basin, covered by the infilling sediments was previously suggested. The volcanic complexes would represent the final stages of such a calderic magmatic system. In order to confirm the existence of other buried intrusives and/or a buried caldera system, detailed ground magnetic and gravity surveys were carried out. The magnetic map is dominated by positive and negative anomalies in the southern sector of the basin, associated with the dacitic domes. The residual Bouguer anomaly presents a semicircular pattern, having only positive values. We applied the curvature technique to analyse the magnetic and gravity signals and used Euler deconvolution to estimate the depth to the sources. Our results would support the hypothesis of a large caldera buried beneath the Laguna de Pozuelos Basin. The identification of such a large Middle Miocene caldera would bring new insight into the magmatic evolution of the northern Puna.
publishDate 2010
dc.date.none.fl_str_mv 2010
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/20.500.12110/paper_00044822_v66_n1-2_p282_Prezzi
url http://hdl.handle.net/20.500.12110/paper_00044822_v66_n1-2_p282_Prezzi
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/2.5/ar
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Rev. Asoc. Geol. Argent. 2010;66(1-2):282-295
reponame:Biblioteca Digital (UBA-FCEN)
instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN
reponame_str Biblioteca Digital (UBA-FCEN)
collection Biblioteca Digital (UBA-FCEN)
instname_str Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str UBA-FCEN
institution UBA-FCEN
repository.name.fl_str_mv Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv ana@bl.fcen.uba.ar
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