Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling

The Southern Patagonian Andes between 48° and 53° SL offers a unique opportunity to study the results of orogenic growth superimposed over a previously rifted region. In this sector the northern Austral or Magallanes basin was affected by late to middle Jurassic extension followed by Late Cretaceous...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Likerman, J., Burlando, J.F., Cristallini, E.O., Ghiglione, M.C.
Formato: JOUR
Materias:
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00401951_v590_n_p106_Likerman
Aporte de:
id todo:paper_00401951_v590_n_p106_Likerman
record_format dspace
spelling todo:paper_00401951_v590_n_p106_Likerman2023-10-03T14:50:18Z Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling Likerman, J. Burlando, J.F. Cristallini, E.O. Ghiglione, M.C. Analog modeling Asymmetric rift Southern Patagonian Andes Tectonic inversion Transfer zones Analog modeling Asymmetric rift Physical modeling Positive inversion Southern Patagonian Andes Structural domains Structural variations Transfer zones Sedimentary rocks Tectonics Models correlation Cretaceous cross section depocenter fold and thrust belt inversion tectonics Jurassic numerical model orogeny seismic data Andes Patagonia The Southern Patagonian Andes between 48° and 53° SL offers a unique opportunity to study the results of orogenic growth superimposed over a previously rifted region. In this sector the northern Austral or Magallanes basin was affected by late to middle Jurassic extension followed by Late Cretaceous to Neogene tectonic compression. The resultant fold-thrust belt displays significant along-strike variations in width and lateral position of the structural domains that may be reflecting a first order control of the Jurassic extensional depocenters, as proposed in previous works. This hypothesis is tested using a series of scaled sandbox analog models involving the positive inversion of two adjacent depocenters with different extensional rates accommodated by a transfer fault. The correlation between structures in the Southern Patagonian Andes and the features in the model have important first order similarities supporting the theory of a positively inverted extensional basin with a previous history of southward increase in extension. Moreover structural cross-sections analyzed from field and seismic data have a geometry that is consistent with serial cross sections resulting from the models. © 2013 Elsevier B.V. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00401951_v590_n_p106_Likerman
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Analog modeling
Asymmetric rift
Southern Patagonian Andes
Tectonic inversion
Transfer zones
Analog modeling
Asymmetric rift
Physical modeling
Positive inversion
Southern Patagonian Andes
Structural domains
Structural variations
Transfer zones
Sedimentary rocks
Tectonics
Models
correlation
Cretaceous
cross section
depocenter
fold and thrust belt
inversion tectonics
Jurassic
numerical model
orogeny
seismic data
Andes
Patagonia
spellingShingle Analog modeling
Asymmetric rift
Southern Patagonian Andes
Tectonic inversion
Transfer zones
Analog modeling
Asymmetric rift
Physical modeling
Positive inversion
Southern Patagonian Andes
Structural domains
Structural variations
Transfer zones
Sedimentary rocks
Tectonics
Models
correlation
Cretaceous
cross section
depocenter
fold and thrust belt
inversion tectonics
Jurassic
numerical model
orogeny
seismic data
Andes
Patagonia
Likerman, J.
Burlando, J.F.
Cristallini, E.O.
Ghiglione, M.C.
Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling
topic_facet Analog modeling
Asymmetric rift
Southern Patagonian Andes
Tectonic inversion
Transfer zones
Analog modeling
Asymmetric rift
Physical modeling
Positive inversion
Southern Patagonian Andes
Structural domains
Structural variations
Transfer zones
Sedimentary rocks
Tectonics
Models
correlation
Cretaceous
cross section
depocenter
fold and thrust belt
inversion tectonics
Jurassic
numerical model
orogeny
seismic data
Andes
Patagonia
description The Southern Patagonian Andes between 48° and 53° SL offers a unique opportunity to study the results of orogenic growth superimposed over a previously rifted region. In this sector the northern Austral or Magallanes basin was affected by late to middle Jurassic extension followed by Late Cretaceous to Neogene tectonic compression. The resultant fold-thrust belt displays significant along-strike variations in width and lateral position of the structural domains that may be reflecting a first order control of the Jurassic extensional depocenters, as proposed in previous works. This hypothesis is tested using a series of scaled sandbox analog models involving the positive inversion of two adjacent depocenters with different extensional rates accommodated by a transfer fault. The correlation between structures in the Southern Patagonian Andes and the features in the model have important first order similarities supporting the theory of a positively inverted extensional basin with a previous history of southward increase in extension. Moreover structural cross-sections analyzed from field and seismic data have a geometry that is consistent with serial cross sections resulting from the models. © 2013 Elsevier B.V.
format JOUR
author Likerman, J.
Burlando, J.F.
Cristallini, E.O.
Ghiglione, M.C.
author_facet Likerman, J.
Burlando, J.F.
Cristallini, E.O.
Ghiglione, M.C.
author_sort Likerman, J.
title Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling
title_short Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling
title_full Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling
title_fullStr Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling
title_full_unstemmed Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling
title_sort along-strike structural variations in the southern patagonian andes: insights from physical modeling
url http://hdl.handle.net/20.500.12110/paper_00401951_v590_n_p106_Likerman
work_keys_str_mv AT likermanj alongstrikestructuralvariationsinthesouthernpatagonianandesinsightsfromphysicalmodeling
AT burlandojf alongstrikestructuralvariationsinthesouthernpatagonianandesinsightsfromphysicalmodeling
AT cristallinieo alongstrikestructuralvariationsinthesouthernpatagonianandesinsightsfromphysicalmodeling
AT ghiglionemc alongstrikestructuralvariationsinthesouthernpatagonianandesinsightsfromphysicalmodeling
_version_ 1807315327667666944