U/Pb ages on detrital zircons in the southern central Andes Neogene foreland (36°-37°S): Constraints on Andean exhumation

U/Pb dating on detrital zircons was performed in the Pampa de Carrizalito depocenter of the Late Miocene foreland basin associated with the Southern Central Andes orogenic front. This reveals Andean and pre-Andean components in magmatic derived zircons inhomogeneously distributed through the sequenc...

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Autores principales: Sagripanti, L., Bottesi, G., Naipauer, M., Folguera, A., Ramos, V.A.
Formato: JOUR
Materias:
Andean uplift
Foreland basin
Grenville
Pampean
Sources
batholith
foreland basin
Neogene
orogenic belt
sedimentary sequence
uplift
uranium-lead dating
zircon
Andes
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08959811_v32_n4_p555_Sagripanti
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_08959811_v32_n4_p555_Sagripanti
record_format dspace
spelling todo:paper_08959811_v32_n4_p555_Sagripanti2023-10-03T15:43:01Z U/Pb ages on detrital zircons in the southern central Andes Neogene foreland (36°-37°S): Constraints on Andean exhumation Sagripanti, L. Bottesi, G. Naipauer, M. Folguera, A. Ramos, V.A. Andean uplift Foreland basin Grenville Pampean Sources batholith foreland basin Neogene orogenic belt sedimentary sequence uplift uranium-lead dating zircon Andes U/Pb dating on detrital zircons was performed in the Pampa de Carrizalito depocenter of the Late Miocene foreland basin associated with the Southern Central Andes orogenic front. This reveals Andean and pre-Andean components in magmatic derived zircons inhomogeneously distributed through the sequence. Andean, Grenville, Pampean, Famatinian and Gondwanic components reveal a complex source distribution from either the Main Andes, Coastal Cordillera and basement foreland areas. These are discussed showing different patterns in the context of the Andean orogenic cycle. Cretaceous and Jurassic components that are partly related to Mesozoic batholiths, developed at the western slope of the Andes at these latitudes, have a very contrasting behavior through the sequence: While Jurassic grains are represented from base to top, Cretaceous ones dilute upwardly. This is explained through the progressive uplift of the Southern Central Andes that could have created a barrier to Cretaceous and Jurassic detritus, while the older ones could have had either an alternative source area represented by the inverted rift system of the Huincul Ridge in the foreland area and the Cordillera del Viento in the hinterland area or the reworking of Jurassic sedimentary sequences of the Neuquén basin. Finally, a progressive enrichment in pre-Andean components to the top of the sequence is interpreted as related to the development of a broken foreland and the consequent rapid expansion of the orogenic front at the time of development of a slab shallowing setting in the region as shown by previous works. © 2011 Elsevier Ltd. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08959811_v32_n4_p555_Sagripanti
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Andean uplift
Foreland basin
Grenville
Pampean
Sources
batholith
foreland basin
Neogene
orogenic belt
sedimentary sequence
uplift
uranium-lead dating
zircon
Andes
spellingShingle Andean uplift
Foreland basin
Grenville
Pampean
Sources
batholith
foreland basin
Neogene
orogenic belt
sedimentary sequence
uplift
uranium-lead dating
zircon
Andes
Sagripanti, L.
Bottesi, G.
Naipauer, M.
Folguera, A.
Ramos, V.A.
U/Pb ages on detrital zircons in the southern central Andes Neogene foreland (36°-37°S): Constraints on Andean exhumation
topic_facet Andean uplift
Foreland basin
Grenville
Pampean
Sources
batholith
foreland basin
Neogene
orogenic belt
sedimentary sequence
uplift
uranium-lead dating
zircon
Andes
description U/Pb dating on detrital zircons was performed in the Pampa de Carrizalito depocenter of the Late Miocene foreland basin associated with the Southern Central Andes orogenic front. This reveals Andean and pre-Andean components in magmatic derived zircons inhomogeneously distributed through the sequence. Andean, Grenville, Pampean, Famatinian and Gondwanic components reveal a complex source distribution from either the Main Andes, Coastal Cordillera and basement foreland areas. These are discussed showing different patterns in the context of the Andean orogenic cycle. Cretaceous and Jurassic components that are partly related to Mesozoic batholiths, developed at the western slope of the Andes at these latitudes, have a very contrasting behavior through the sequence: While Jurassic grains are represented from base to top, Cretaceous ones dilute upwardly. This is explained through the progressive uplift of the Southern Central Andes that could have created a barrier to Cretaceous and Jurassic detritus, while the older ones could have had either an alternative source area represented by the inverted rift system of the Huincul Ridge in the foreland area and the Cordillera del Viento in the hinterland area or the reworking of Jurassic sedimentary sequences of the Neuquén basin. Finally, a progressive enrichment in pre-Andean components to the top of the sequence is interpreted as related to the development of a broken foreland and the consequent rapid expansion of the orogenic front at the time of development of a slab shallowing setting in the region as shown by previous works. © 2011 Elsevier Ltd.
format JOUR
author Sagripanti, L.
Bottesi, G.
Naipauer, M.
Folguera, A.
Ramos, V.A.
author_facet Sagripanti, L.
Bottesi, G.
Naipauer, M.
Folguera, A.
Ramos, V.A.
author_sort Sagripanti, L.
title U/Pb ages on detrital zircons in the southern central Andes Neogene foreland (36°-37°S): Constraints on Andean exhumation
title_short U/Pb ages on detrital zircons in the southern central Andes Neogene foreland (36°-37°S): Constraints on Andean exhumation
title_full U/Pb ages on detrital zircons in the southern central Andes Neogene foreland (36°-37°S): Constraints on Andean exhumation
title_fullStr U/Pb ages on detrital zircons in the southern central Andes Neogene foreland (36°-37°S): Constraints on Andean exhumation
title_full_unstemmed U/Pb ages on detrital zircons in the southern central Andes Neogene foreland (36°-37°S): Constraints on Andean exhumation
title_sort u/pb ages on detrital zircons in the southern central andes neogene foreland (36°-37°s): constraints on andean exhumation
url http://hdl.handle.net/20.500.12110/paper_08959811_v32_n4_p555_Sagripanti
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