Fueguian Andes foreland fold and thrust belt: Structure and growth strata

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Foreland basin deposits involved in the Fueguian foreland fold and thrust belt were studied on the Atlantic coast of Tierra del Fuego. More specifically, growth strata developed in middle Eocene sequences deposited in the wedge top depozone were analyzed. Restoration methods and kinematics forward m...

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Autores principales: Ghiglione, M.C., Ramos, V.A., Cristallini, E.O.
Formato: JOUR
Materias:
Austral foreland basin
Growth strata
Restoration of growth folds
Tierra del Fuego
Wedge-top
crustal evolution
fold and thrust belt
Andes
South America
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_07160208_v29_n1_p_Ghiglione
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_07160208_v29_n1_p_Ghiglione
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spelling todo:paper_07160208_v29_n1_p_Ghiglione2023-10-03T15:36:09Z Fueguian Andes foreland fold and thrust belt: Structure and growth strata Ghiglione, M.C. Ramos, V.A. Cristallini, E.O. Austral foreland basin Growth strata Restoration of growth folds Tierra del Fuego Wedge-top crustal evolution fold and thrust belt Andes South America Foreland basin deposits involved in the Fueguian foreland fold and thrust belt were studied on the Atlantic coast of Tierra del Fuego. More specifically, growth strata developed in middle Eocene sequences deposited in the wedge top depozone were analyzed. Restoration methods and kinematics forward modeling were applied, revealing folding kinematics and defining the geometry of the structure at various stages in its geological history. The folded units are characterized by strong competency contrasts and display a transition in deformation behavior from detachment folding to progressive fault propagation with increasing shortening. The evolution of this sector can be summarized in two different tectonic pulses: (1) lower to middle Eocene: development of detachment folding with limb rotation; sedimentation rate was always lower relative to fold growth rate and both of them decreased with time. (2) upper Eocene?-Oligocene: Continued shortening resulted in the propagation of thrust faults through competent units on the steep front limb and the migration northward of the foreland basin system; probably related to generalized wrench kinematics which affected the region. © 2005 Servicio Nacional de Geología y Minería. Fil:Ghiglione, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ramos, V.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cristallini, E.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_07160208_v29_n1_p_Ghiglione
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Austral foreland basin
Growth strata
Restoration of growth folds
Tierra del Fuego
Wedge-top
crustal evolution
fold and thrust belt
Andes
South America
spellingShingle Austral foreland basin
Growth strata
Restoration of growth folds
Tierra del Fuego
Wedge-top
crustal evolution
fold and thrust belt
Andes
South America
Ghiglione, M.C.
Ramos, V.A.
Cristallini, E.O.
Fueguian Andes foreland fold and thrust belt: Structure and growth strata
topic_facet Austral foreland basin
Growth strata
Restoration of growth folds
Tierra del Fuego
Wedge-top
crustal evolution
fold and thrust belt
Andes
South America
description Foreland basin deposits involved in the Fueguian foreland fold and thrust belt were studied on the Atlantic coast of Tierra del Fuego. More specifically, growth strata developed in middle Eocene sequences deposited in the wedge top depozone were analyzed. Restoration methods and kinematics forward modeling were applied, revealing folding kinematics and defining the geometry of the structure at various stages in its geological history. The folded units are characterized by strong competency contrasts and display a transition in deformation behavior from detachment folding to progressive fault propagation with increasing shortening. The evolution of this sector can be summarized in two different tectonic pulses: (1) lower to middle Eocene: development of detachment folding with limb rotation; sedimentation rate was always lower relative to fold growth rate and both of them decreased with time. (2) upper Eocene?-Oligocene: Continued shortening resulted in the propagation of thrust faults through competent units on the steep front limb and the migration northward of the foreland basin system; probably related to generalized wrench kinematics which affected the region. © 2005 Servicio Nacional de Geología y Minería.
format JOUR
author Ghiglione, M.C.
Ramos, V.A.
Cristallini, E.O.
author_facet Ghiglione, M.C.
Ramos, V.A.
Cristallini, E.O.
author_sort Ghiglione, M.C.
title Fueguian Andes foreland fold and thrust belt: Structure and growth strata
title_short Fueguian Andes foreland fold and thrust belt: Structure and growth strata
title_full Fueguian Andes foreland fold and thrust belt: Structure and growth strata
title_fullStr Fueguian Andes foreland fold and thrust belt: Structure and growth strata
title_full_unstemmed Fueguian Andes foreland fold and thrust belt: Structure and growth strata
title_sort fueguian andes foreland fold and thrust belt: structure and growth strata
url http://hdl.handle.net/20.500.12110/paper_07160208_v29_n1_p_Ghiglione
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AT ramosva fueguianandesforelandfoldandthrustbeltstructureandgrowthstrata
AT cristallinieo fueguianandesforelandfoldandthrustbeltstructureandgrowthstrata
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