Role of basin width variation in tectonic inversion: Insight from analogue modelling and implications for the tectonic inversion of the Abanico Basin, 32°-34°S, Central Andes

We use analogue modelling to investigate the response of compressional deformation superimposed on an extensional basin with along-strike changes in width. Parameters described include extension and shortening distribution and directions, orientation of structures and degree of basin inversion. Two...

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Detalles Bibliográficos
Publicado: 2015
Materias:
basin evolution
compression
deformation
extensional tectonics
numerical model
structural control
tectonic evolution
Abanico
Andes
Bio Bio
Chile
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v399_n_p83_Jara
http://hdl.handle.net/20.500.12110/paper_03058719_v399_n_p83_Jara
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_03058719_v399_n_p83_Jara
record_format dspace
spelling paper:paper_03058719_v399_n_p83_Jara2023-06-08T15:31:00Z Role of basin width variation in tectonic inversion: Insight from analogue modelling and implications for the tectonic inversion of the Abanico Basin, 32°-34°S, Central Andes basin evolution compression deformation extensional tectonics numerical model structural control tectonic evolution Abanico Andes Bio Bio Chile We use analogue modelling to investigate the response of compressional deformation superimposed on an extensional basin with along-strike changes in width. Parameters described include extension and shortening distribution and directions, orientation of structures and degree of basin inversion. Two types of model are presented: in the first (Type I), an extensional basin is constructed with variable width (applying differential extension) and subsequently inverted by homogeneous shortening; in the second (Type II), an extensional basin with constant width is subsequently inverted by inhomogeneous shortening (differential compression). From our observations, we compare both types of model to structural patterns observed in some natural cases from the Central Andes. Both models generate oblique structures, but in the Type II model a significant rotation is characteristic. Our results suggest that in the Central Andes region between 32° and 33°S, the Abanico Basin may correspond to a basin of smaller area compared to the larger basin south of 33°S. Our Type I model further explains some patterns observed there, from which we conclude that the control exercised by the width of a pre-existing basin should be considered when interpreting the geological evolution of that area of the Andes. © 2015 The Geological Society of London. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v399_n_p83_Jara http://hdl.handle.net/20.500.12110/paper_03058719_v399_n_p83_Jara
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic basin evolution
compression
deformation
extensional tectonics
numerical model
structural control
tectonic evolution
Abanico
Andes
Bio Bio
Chile
spellingShingle basin evolution
compression
deformation
extensional tectonics
numerical model
structural control
tectonic evolution
Abanico
Andes
Bio Bio
Chile
Role of basin width variation in tectonic inversion: Insight from analogue modelling and implications for the tectonic inversion of the Abanico Basin, 32°-34°S, Central Andes
topic_facet basin evolution
compression
deformation
extensional tectonics
numerical model
structural control
tectonic evolution
Abanico
Andes
Bio Bio
Chile
description We use analogue modelling to investigate the response of compressional deformation superimposed on an extensional basin with along-strike changes in width. Parameters described include extension and shortening distribution and directions, orientation of structures and degree of basin inversion. Two types of model are presented: in the first (Type I), an extensional basin is constructed with variable width (applying differential extension) and subsequently inverted by homogeneous shortening; in the second (Type II), an extensional basin with constant width is subsequently inverted by inhomogeneous shortening (differential compression). From our observations, we compare both types of model to structural patterns observed in some natural cases from the Central Andes. Both models generate oblique structures, but in the Type II model a significant rotation is characteristic. Our results suggest that in the Central Andes region between 32° and 33°S, the Abanico Basin may correspond to a basin of smaller area compared to the larger basin south of 33°S. Our Type I model further explains some patterns observed there, from which we conclude that the control exercised by the width of a pre-existing basin should be considered when interpreting the geological evolution of that area of the Andes. © 2015 The Geological Society of London.
title Role of basin width variation in tectonic inversion: Insight from analogue modelling and implications for the tectonic inversion of the Abanico Basin, 32°-34°S, Central Andes
title_short Role of basin width variation in tectonic inversion: Insight from analogue modelling and implications for the tectonic inversion of the Abanico Basin, 32°-34°S, Central Andes
title_full Role of basin width variation in tectonic inversion: Insight from analogue modelling and implications for the tectonic inversion of the Abanico Basin, 32°-34°S, Central Andes
title_fullStr Role of basin width variation in tectonic inversion: Insight from analogue modelling and implications for the tectonic inversion of the Abanico Basin, 32°-34°S, Central Andes
title_full_unstemmed Role of basin width variation in tectonic inversion: Insight from analogue modelling and implications for the tectonic inversion of the Abanico Basin, 32°-34°S, Central Andes
title_sort role of basin width variation in tectonic inversion: insight from analogue modelling and implications for the tectonic inversion of the abanico basin, 32°-34°s, central andes
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03058719_v399_n_p83_Jara
http://hdl.handle.net/20.500.12110/paper_03058719_v399_n_p83_Jara
_version_ 1768546160955359232

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