3D deformation in strike-slip systems: Analogue modelling and numerical restoration

Regional and local strike-slip systems in Chile are complex and pose interesting questions, such as the interaction between strike-slip and reverse faults, how they evolve, and the relationship between shortening, rotation and uplift. Within this context, we developed a new analytical method based o...

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Autores principales:	González,Daniel, Pinto,Luisa, Peña,Matías, Arriagada,César
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2012
Materias:	3D Analogue modelling Numerical restoration Strike-slip system Transpression-transtension
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062012000200006
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spelling	oai:scielo:S0718-710620120002000062012-07-113D deformation in strike-slip systems: Analogue modelling and numerical restorationGonzález,DanielPinto,LuisaPeña,MatíasArriagada,César 3D Analogue modelling Numerical restoration Strike-slip system Transpression-transtension Regional and local strike-slip systems in Chile are complex and pose interesting questions, such as the interaction between strike-slip and reverse faults, how they evolve, and the relationship between shortening, rotation and uplift. Within this context, we developed a new analytical method based on analogue and numerical modelling applied to 3D, pure and transtensional-transpressional strike-slip systems. Analogue modelling results indicate that in restraining stepovers of strike-slip fault systems, where antiformal pop-up structures are usually formed, pre-existent basement structures with a high angle to the main strike-slip fault will generate a higher rotation of blocks. However, when these structures are oriented at a high angle with respect to the main stress convergence vector, the rotation will be less and therefore a higher tendency to uplift will be produced. These results were applied to NW- and SE-striking basement faults oblique to N-S mega-thrust faults in central Chile (32°-35°S), for which we propose a simultaneous development based on the analogue model results. Moreover, we propose that strike-slip movement occurred on thrust faults in central Chile. Furthermore, we performed a numerical restoration of an analogue experiment which modeled a pure strike-slip system, and concluded that the restoration is very sensitive to shortening data as well as to rotational data. These results are extremely important for future numerical and regional analysis of strike-slip systems.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.39 n.2 20122012-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062012000200006en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	3D Analogue modelling Numerical restoration Strike-slip system Transpression-transtension
spellingShingle	3D Analogue modelling Numerical restoration Strike-slip system Transpression-transtension González,Daniel Pinto,Luisa Peña,Matías Arriagada,César 3D deformation in strike-slip systems: Analogue modelling and numerical restoration
description	Regional and local strike-slip systems in Chile are complex and pose interesting questions, such as the interaction between strike-slip and reverse faults, how they evolve, and the relationship between shortening, rotation and uplift. Within this context, we developed a new analytical method based on analogue and numerical modelling applied to 3D, pure and transtensional-transpressional strike-slip systems. Analogue modelling results indicate that in restraining stepovers of strike-slip fault systems, where antiformal pop-up structures are usually formed, pre-existent basement structures with a high angle to the main strike-slip fault will generate a higher rotation of blocks. However, when these structures are oriented at a high angle with respect to the main stress convergence vector, the rotation will be less and therefore a higher tendency to uplift will be produced. These results were applied to NW- and SE-striking basement faults oblique to N-S mega-thrust faults in central Chile (32°-35°S), for which we propose a simultaneous development based on the analogue model results. Moreover, we propose that strike-slip movement occurred on thrust faults in central Chile. Furthermore, we performed a numerical restoration of an analogue experiment which modeled a pure strike-slip system, and concluded that the restoration is very sensitive to shortening data as well as to rotational data. These results are extremely important for future numerical and regional analysis of strike-slip systems.
author	González,Daniel Pinto,Luisa Peña,Matías Arriagada,César
author_facet	González,Daniel Pinto,Luisa Peña,Matías Arriagada,César
author_sort	González,Daniel
title	3D deformation in strike-slip systems: Analogue modelling and numerical restoration
title_short	3D deformation in strike-slip systems: Analogue modelling and numerical restoration
title_full	3D deformation in strike-slip systems: Analogue modelling and numerical restoration
title_fullStr	3D deformation in strike-slip systems: Analogue modelling and numerical restoration
title_full_unstemmed	3D deformation in strike-slip systems: Analogue modelling and numerical restoration
title_sort	3d deformation in strike-slip systems: analogue modelling and numerical restoration
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062012000200006
work_keys_str_mv	AT gonzalezdaniel 3ddeformationinstrikeslipsystemsanaloguemodellingandnumericalrestoration AT pintoluisa 3ddeformationinstrikeslipsystemsanaloguemodellingandnumericalrestoration AT penamatias 3ddeformationinstrikeslipsystemsanaloguemodellingandnumericalrestoration AT arriagadacesar 3ddeformationinstrikeslipsystemsanaloguemodellingandnumericalrestoration
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3D deformation in strike-slip systems: Analogue modelling and numerical restoration

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