Thermo-mechanical analysis of the Andean lithosphere over the Chilean-Pampean flat-slab region

Flat subduction segments are generally related to cold lithospheric zones, which suggest low Heat flow values and therefore a deeper Curie isotherm. In this study we perform a geophysical analysis by using high - resolution magnetic data, obtaining shallower Curie point depths through the Chilean-Pa...

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Autores principales: Sánchez, M.A., Ariza, J.P., García, H.P.A., Gianni, G.M., Weidmann, M.C., Folguera, A., Lince Klinger, F., Martinez, M.P.
Formato: JOUR
Materias:
Chilean-Pampean flat-slab
Curie Point Depth
Elastic thickness
Heat flow
Magnetic data
cordillera
Curie point
foreland basin
heat flow
lithospheric structure
magnetic field
slab
thermal structure
thermomechanics
Calluna vulgaris
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08959811_v87_n_p247_Sanchez
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_08959811_v87_n_p247_Sanchez2023-10-03T15:43:39Z Thermo-mechanical analysis of the Andean lithosphere over the Chilean-Pampean flat-slab region Sánchez, M.A. Ariza, J.P. García, H.P.A. Gianni, G.M. Weidmann, M.C. Folguera, A. Lince Klinger, F. Martinez, M.P. Chilean-Pampean flat-slab Curie Point Depth Elastic thickness Heat flow Magnetic data cordillera Curie point foreland basin heat flow lithospheric structure magnetic field slab thermal structure thermomechanics Calluna vulgaris Flat subduction segments are generally related to cold lithospheric zones, which suggest low Heat flow values and therefore a deeper Curie isotherm. In this study we perform a geophysical analysis by using high - resolution magnetic data, obtaining shallower Curie point depths through the Chilean-Pampean flat-slab zone. Then using temperatures from borehole data and Curie Point Depths, we performed a Heat Flow map which indicates the existence of mean to high thermal anomalies across the Chilean - Pampean flat-slab. These results were contrasted with Elastic Thickness map (Te) obtained from the Eigen-6C4 gravity model. Low Te values acquired indicate zones with weak mechanical behavior in correspondence to thermal anomalous zones. This spatial correlation suggests that the local high thermal anomalies are conditioning the mechanical behavior of the lithosphere in the study area and the locations of geothermal sources. Overall, our results indicate that the thermal structure of the flat-slab segment is more heterogeneous than previously thought. This has implications for evolution, maturity and fluid circulation in foreland basins of the Main and Frontal cordilleras and the Precordillera thrust belts. Finally, further studies will allow improving our database as well as extending our understanding of the thermal structure of the Chilean-Pampean flat-slab. © 2017 Elsevier Ltd JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08959811_v87_n_p247_Sanchez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Chilean-Pampean flat-slab
Curie Point Depth
Elastic thickness
Heat flow
Magnetic data
cordillera
Curie point
foreland basin
heat flow
lithospheric structure
magnetic field
slab
thermal structure
thermomechanics
Calluna vulgaris
spellingShingle Chilean-Pampean flat-slab
Curie Point Depth
Elastic thickness
Heat flow
Magnetic data
cordillera
Curie point
foreland basin
heat flow
lithospheric structure
magnetic field
slab
thermal structure
thermomechanics
Calluna vulgaris
Sánchez, M.A.
Ariza, J.P.
García, H.P.A.
Gianni, G.M.
Weidmann, M.C.
Folguera, A.
Lince Klinger, F.
Martinez, M.P.
Thermo-mechanical analysis of the Andean lithosphere over the Chilean-Pampean flat-slab region
topic_facet Chilean-Pampean flat-slab
Curie Point Depth
Elastic thickness
Heat flow
Magnetic data
cordillera
Curie point
foreland basin
heat flow
lithospheric structure
magnetic field
slab
thermal structure
thermomechanics
Calluna vulgaris
description Flat subduction segments are generally related to cold lithospheric zones, which suggest low Heat flow values and therefore a deeper Curie isotherm. In this study we perform a geophysical analysis by using high - resolution magnetic data, obtaining shallower Curie point depths through the Chilean-Pampean flat-slab zone. Then using temperatures from borehole data and Curie Point Depths, we performed a Heat Flow map which indicates the existence of mean to high thermal anomalies across the Chilean - Pampean flat-slab. These results were contrasted with Elastic Thickness map (Te) obtained from the Eigen-6C4 gravity model. Low Te values acquired indicate zones with weak mechanical behavior in correspondence to thermal anomalous zones. This spatial correlation suggests that the local high thermal anomalies are conditioning the mechanical behavior of the lithosphere in the study area and the locations of geothermal sources. Overall, our results indicate that the thermal structure of the flat-slab segment is more heterogeneous than previously thought. This has implications for evolution, maturity and fluid circulation in foreland basins of the Main and Frontal cordilleras and the Precordillera thrust belts. Finally, further studies will allow improving our database as well as extending our understanding of the thermal structure of the Chilean-Pampean flat-slab. © 2017 Elsevier Ltd
format JOUR
author Sánchez, M.A.
Ariza, J.P.
García, H.P.A.
Gianni, G.M.
Weidmann, M.C.
Folguera, A.
Lince Klinger, F.
Martinez, M.P.
author_facet Sánchez, M.A.
Ariza, J.P.
García, H.P.A.
Gianni, G.M.
Weidmann, M.C.
Folguera, A.
Lince Klinger, F.
Martinez, M.P.
author_sort Sánchez, M.A.
title Thermo-mechanical analysis of the Andean lithosphere over the Chilean-Pampean flat-slab region
title_short Thermo-mechanical analysis of the Andean lithosphere over the Chilean-Pampean flat-slab region
title_full Thermo-mechanical analysis of the Andean lithosphere over the Chilean-Pampean flat-slab region
title_fullStr Thermo-mechanical analysis of the Andean lithosphere over the Chilean-Pampean flat-slab region
title_full_unstemmed Thermo-mechanical analysis of the Andean lithosphere over the Chilean-Pampean flat-slab region
title_sort thermo-mechanical analysis of the andean lithosphere over the chilean-pampean flat-slab region
url http://hdl.handle.net/20.500.12110/paper_08959811_v87_n_p247_Sanchez
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