Late Cretaceous Uplift in the Malargiie fold-and-thrust belt (35°S), 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,Víctor Alberto
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2013
Materias:	Andes Orogeny Cretaceous Foreland basin
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062013000100005
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spelling	oai:scielo:S0718-710620130001000052014-09-08Late Cretaceous Uplift in the Malargiie fold-and-thrust belt (35°S), southern Central Andes of Argentina and ChileMescua,José FranciscoGiambiagi,Laura BeatrizRamos,Víctor Alberto Andes Orogeny Cretaceous Foreland 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 (35°S), 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 35°S 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.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.40 n.1 20132013-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062013000100005en10.5027/andgeoV40n1-a05
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Andes Orogeny Cretaceous Foreland basin
spellingShingle	Andes Orogeny Cretaceous Foreland basin Mescua,José Francisco Giambiagi,Laura Beatriz Ramos,Víctor Alberto Late Cretaceous Uplift in the Malargiie fold-and-thrust belt (35°S), southern Central Andes of Argentina and Chile
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 (35°S), 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 35°S 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,Víctor Alberto
author_facet	Mescua,José Francisco Giambiagi,Laura Beatriz Ramos,Víctor Alberto
author_sort	Mescua,José Francisco
title	Late Cretaceous Uplift in the Malargiie fold-and-thrust belt (35°S), southern Central Andes of Argentina and Chile
title_short	Late Cretaceous Uplift in the Malargiie fold-and-thrust belt (35°S), southern Central Andes of Argentina and Chile
title_full	Late Cretaceous Uplift in the Malargiie fold-and-thrust belt (35°S), southern Central Andes of Argentina and Chile
title_fullStr	Late Cretaceous Uplift in the Malargiie fold-and-thrust belt (35°S), southern Central Andes of Argentina and Chile
title_full_unstemmed	Late Cretaceous Uplift in the Malargiie fold-and-thrust belt (35°S), southern Central Andes of Argentina and Chile
title_sort	late cretaceous uplift in the malargiie fold-and-thrust belt (35°s), southern central andes of argentina and chile
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062013000100005
work_keys_str_mv	AT mescuajosefrancisco latecretaceousupliftinthemalargiiefoldandthrustbelt35ssoutherncentralandesofargentinaandchile AT giambiagilaurabeatriz latecretaceousupliftinthemalargiiefoldandthrustbelt35ssoutherncentralandesofargentinaandchile AT ramosvictoralberto latecretaceousupliftinthemalargiiefoldandthrustbelt35ssoutherncentralandesofargentinaandchile
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Late Cretaceous Uplift in the Malargiie fold-and-thrust belt (35°S), southern Central Andes of Argentina and Chile

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