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

Mostrar todas las versiones(3)

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 det...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Prezzi, C.B., Lince Klinger, F.
Formato:	Artículo publishedVersion
Publicado:	2010
Materias:	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
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00044822_v66_n1-2_p282_Prezzi https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v66_n1-2_p282_Prezzi_oai
Aporte de:	Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires

id	I28-R145-paper_00044822_v66_n1-2_p282_Prezzi_oai
record_format	dspace
spelling	I28-R145-paper_00044822_v66_n1-2_p282_Prezzi_oai2024-08-16 Prezzi, C.B. Lince Klinger, F. 2010 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. application/pdf http://hdl.handle.net/20.500.12110/paper_00044822_v66_n1-2_p282_Prezzi info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Rev. Asoc. Geol. Argent. 2010;66(1-2):282-295 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 New geophysical evidences of the presence of a buried caldera in Laguna Pozuelos, Northern Puna info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v66_n1-2_p282_Prezzi_oai
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-145
collection	Repositorio Digital de la Universidad de Buenos Aires (UBA)
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
spellingShingle	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 Prezzi, C.B. Lince Klinger, F. New geophysical evidences of the presence of a buried caldera in Laguna Pozuelos, Northern Puna
topic_facet	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
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.
format	Artículo Artículo publishedVersion
author	Prezzi, C.B. Lince Klinger, F.
author_facet	Prezzi, C.B. Lince Klinger, F.
author_sort	Prezzi, C.B.
title	New geophysical evidences of the presence of a buried caldera in Laguna Pozuelos, Northern 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
publishDate	2010
url	http://hdl.handle.net/20.500.12110/paper_00044822_v66_n1-2_p282_Prezzi https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v66_n1-2_p282_Prezzi_oai
work_keys_str_mv	AT prezzicb newgeophysicalevidencesofthepresenceofaburiedcalderainlagunapozuelosnorthernpuna AT linceklingerf newgeophysicalevidencesofthepresenceofaburiedcalderainlagunapozuelosnorthernpuna
_version_	1809356948966998016

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

Ejemplares similares