Late Cretaceous uplift in the Malargüe fold-and-thrust belt (35oS), southern Central Andes of Argentina and Chile

The Cordillera de los Andes is the typical example of a subduction-related orogen. Its present topography is the result of post-Miocene uplift, however, Andean compressional deformation and uplift started in the Late Cretaceous, as increasingly recognized in different sectors of the mountain belt. W...

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Autores principales:	Mescua, José Francisco, Giambiagi, Laura Beatriz, Ramos, Victor Alberto
Publicado:	2013
Materias:	Andes Cretaceous Foreland basin Orogeny deformation fold and thrust belt foreland basin Miocene normal fault orogeny provenance subduction topography uplift Argentina Chile Neuquen Basin
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07187092_v40_n1_p102_Mescua http://hdl.handle.net/20.500.12110/paper_07187092_v40_n1_p102_Mescua
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_07187092_v40_n1_p102_Mescua
record_format	dspace
spelling	paper:paper_07187092_v40_n1_p102_Mescua2025-07-30T18:19:44Z Late Cretaceous uplift in the Malargüe fold-and-thrust belt (35oS), southern Central Andes of Argentina and Chile Mescua, José Francisco Giambiagi, Laura Beatriz Ramos, Victor Alberto Andes Cretaceous Foreland basin Orogeny Cretaceous deformation fold and thrust belt foreland basin Miocene normal fault orogeny provenance subduction topography uplift Andes Argentina Chile Neuquen Basin The Cordillera de los Andes is the typical example of a subduction-related orogen. Its present topography is the result of post-Miocene uplift, however, Andean compressional deformation and uplift started in the Late Cretaceous, as increasingly recognized in different sectors of the mountain belt. We present evidences of a Late Cretaceous event of compressional deformation in the southern Central Andes (35oS), reflected in syn-orogenic foreland basin deposits assigned to the Neuquén Group in Argentina and the Brownish-Red Clastic Unit in Chile. Comparison of the facies of these units allows us to recognize a sector proximal to the Late Cretaceous orogenic front, a distal sector with sediment provenance from the forebulge and a western sector where the sediments where deposited within the Late Cretaceous mountain belt. On this basis, we assign the orogenic front to an inverted Jurassic normal fault, the Río del Cobre fault, and reconstruct the structure of the easternmost Late Cretaceous Andes at this latitude. The change in the location of the orogenic front north and south of 35oS allows us to recognize a long-lived change in behavior in Andean evolution in this sector, which correlates with a change in the shape and the deposits of Mesozoic Neuquén basin. Fil:Mescua, J.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Giambiagi, L.B. 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. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07187092_v40_n1_p102_Mescua http://hdl.handle.net/20.500.12110/paper_07187092_v40_n1_p102_Mescua
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Andes Cretaceous Foreland basin Orogeny Cretaceous deformation fold and thrust belt foreland basin Miocene normal fault orogeny provenance subduction topography uplift Andes Argentina Chile Neuquen Basin
spellingShingle	Andes Cretaceous Foreland basin Orogeny Cretaceous deformation fold and thrust belt foreland basin Miocene normal fault orogeny provenance subduction topography uplift Andes Argentina Chile Neuquen Basin Mescua, José Francisco Giambiagi, Laura Beatriz Ramos, Victor Alberto Late Cretaceous uplift in the Malargüe fold-and-thrust belt (35oS), southern Central Andes of Argentina and Chile
topic_facet	Andes Cretaceous Foreland basin Orogeny Cretaceous deformation fold and thrust belt foreland basin Miocene normal fault orogeny provenance subduction topography uplift Andes Argentina Chile Neuquen Basin
description	The Cordillera de los Andes is the typical example of a subduction-related orogen. Its present topography is the result of post-Miocene uplift, however, Andean compressional deformation and uplift started in the Late Cretaceous, as increasingly recognized in different sectors of the mountain belt. We present evidences of a Late Cretaceous event of compressional deformation in the southern Central Andes (35oS), reflected in syn-orogenic foreland basin deposits assigned to the Neuquén Group in Argentina and the Brownish-Red Clastic Unit in Chile. Comparison of the facies of these units allows us to recognize a sector proximal to the Late Cretaceous orogenic front, a distal sector with sediment provenance from the forebulge and a western sector where the sediments where deposited within the Late Cretaceous mountain belt. On this basis, we assign the orogenic front to an inverted Jurassic normal fault, the Río del Cobre fault, and reconstruct the structure of the easternmost Late Cretaceous Andes at this latitude. The change in the location of the orogenic front north and south of 35oS allows us to recognize a long-lived change in behavior in Andean evolution in this sector, which correlates with a change in the shape and the deposits of Mesozoic Neuquén basin.
author	Mescua, José Francisco Giambiagi, Laura Beatriz Ramos, Victor Alberto
author_facet	Mescua, José Francisco Giambiagi, Laura Beatriz Ramos, Victor Alberto
author_sort	Mescua, José Francisco
title	Late Cretaceous uplift in the Malargüe fold-and-thrust belt (35oS), southern Central Andes of Argentina and Chile
title_short	Late Cretaceous uplift in the Malargüe fold-and-thrust belt (35oS), southern Central Andes of Argentina and Chile
title_full	Late Cretaceous uplift in the Malargüe fold-and-thrust belt (35oS), southern Central Andes of Argentina and Chile
title_fullStr	Late Cretaceous uplift in the Malargüe fold-and-thrust belt (35oS), southern Central Andes of Argentina and Chile
title_full_unstemmed	Late Cretaceous uplift in the Malargüe fold-and-thrust belt (35oS), southern Central Andes of Argentina and Chile
title_sort	late cretaceous uplift in the malargüe fold-and-thrust belt (35os), southern central andes of argentina and chile
publishDate	2013
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07187092_v40_n1_p102_Mescua http://hdl.handle.net/20.500.12110/paper_07187092_v40_n1_p102_Mescua
work_keys_str_mv	AT mescuajosefrancisco latecretaceousupliftinthemalarguefoldandthrustbelt35ossoutherncentralandesofargentinaandchile AT giambiagilaurabeatriz latecretaceousupliftinthemalarguefoldandthrustbelt35ossoutherncentralandesofargentinaandchile AT ramosvictoralberto latecretaceousupliftinthemalarguefoldandthrustbelt35ossoutherncentralandesofargentinaandchile
_version_	1840325945360121856

Late Cretaceous uplift in the Malargüe fold-and-thrust belt (35oS), southern Central Andes of Argentina and Chile

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