Tectonic control on the evolution of the fluvial systems of the Vinchina Formation (Miocene), northwestern Argentina

The Miocene Vinchina Formation accumulated in a large foreland basin is related to the uplift of the Andes Mountains. This 5100 m thick unit was mostly deposited in fluvial environments, but short episodes of eolian and lacustrine sedimentation also occurred. Low-angle intraformational unconformitie...

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Autores principales: Limarino, C., Tripaldi, A., Marenssi, S., Net, L., Re, G., Caselli, A.
Formato: JOUR
Materias:
Fluvial Systems
Foreland Basin
Tertiary
Vinchina Formation
depositional sequence
fluvial deposit
foreland basin
Miocene
subsidence
tectonic evolution
Argentina
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08959811_v14_n7_p751_Limarino
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_08959811_v14_n7_p751_Limarino2023-10-03T15:42:32Z Tectonic control on the evolution of the fluvial systems of the Vinchina Formation (Miocene), northwestern Argentina Limarino, C. Tripaldi, A. Marenssi, S. Net, L. Re, G. Caselli, A. Fluvial Systems Foreland Basin Tertiary Vinchina Formation depositional sequence fluvial deposit foreland basin Miocene subsidence tectonic evolution Argentina The Miocene Vinchina Formation accumulated in a large foreland basin is related to the uplift of the Andes Mountains. This 5100 m thick unit was mostly deposited in fluvial environments, but short episodes of eolian and lacustrine sedimentation also occurred. Low-angle intraformational unconformities and dramatic facies changes define three depositional sequences. Sequence S1 is composed of sandstones and mudstones deposited in anastomosing river systems during a period of tectonic quiescence. Sequence S2, formed by conglomerates and sandstones with scarce intercalations of mudstones, rests on a low-angle erosional surface and represents deposition in fluvial braided systems. S2 probably resulted from progradation of elastic wedges after an episode of uplift of the fold-thrust belt. Sequence S3, dominated by sandstones, mudstones, and sparse intraformational conglomerates, was deposited in ephemeral braided and meandering rivers governed by a complex balance between subsidence and supply. Fluvial styles in the Vinchina Formation allowed the recognition of three major stages in the foreland basin evolution. During the underfilled stage (S1), high subsidence rates favored the development of axial anastomosing rivers with well-preserved floodplain sediments. Early post-tectonic sedimentation marks initial overfilled conditions (S2), characterized by high sediment supply and progradation of elastic wedges as braided rivers deposits. Finally, more advanced overfilled conditions (S3) were reached when sediment supply matched subsidence, giving birth to ephemeral braided and meandering systems. © 2001 Elsevier Science Ltd. All rights reserved. Fil:Limarino, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tripaldi, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Marenssi, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Net, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Re, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Caselli, A. 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_08959811_v14_n7_p751_Limarino
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Fluvial Systems
Foreland Basin
Tertiary
Vinchina Formation
depositional sequence
fluvial deposit
foreland basin
Miocene
subsidence
tectonic evolution
Argentina
spellingShingle Fluvial Systems
Foreland Basin
Tertiary
Vinchina Formation
depositional sequence
fluvial deposit
foreland basin
Miocene
subsidence
tectonic evolution
Argentina
Limarino, C.
Tripaldi, A.
Marenssi, S.
Net, L.
Re, G.
Caselli, A.
Tectonic control on the evolution of the fluvial systems of the Vinchina Formation (Miocene), northwestern Argentina
topic_facet Fluvial Systems
Foreland Basin
Tertiary
Vinchina Formation
depositional sequence
fluvial deposit
foreland basin
Miocene
subsidence
tectonic evolution
Argentina
description The Miocene Vinchina Formation accumulated in a large foreland basin is related to the uplift of the Andes Mountains. This 5100 m thick unit was mostly deposited in fluvial environments, but short episodes of eolian and lacustrine sedimentation also occurred. Low-angle intraformational unconformities and dramatic facies changes define three depositional sequences. Sequence S1 is composed of sandstones and mudstones deposited in anastomosing river systems during a period of tectonic quiescence. Sequence S2, formed by conglomerates and sandstones with scarce intercalations of mudstones, rests on a low-angle erosional surface and represents deposition in fluvial braided systems. S2 probably resulted from progradation of elastic wedges after an episode of uplift of the fold-thrust belt. Sequence S3, dominated by sandstones, mudstones, and sparse intraformational conglomerates, was deposited in ephemeral braided and meandering rivers governed by a complex balance between subsidence and supply. Fluvial styles in the Vinchina Formation allowed the recognition of three major stages in the foreland basin evolution. During the underfilled stage (S1), high subsidence rates favored the development of axial anastomosing rivers with well-preserved floodplain sediments. Early post-tectonic sedimentation marks initial overfilled conditions (S2), characterized by high sediment supply and progradation of elastic wedges as braided rivers deposits. Finally, more advanced overfilled conditions (S3) were reached when sediment supply matched subsidence, giving birth to ephemeral braided and meandering systems. © 2001 Elsevier Science Ltd. All rights reserved.
format JOUR
author Limarino, C.
Tripaldi, A.
Marenssi, S.
Net, L.
Re, G.
Caselli, A.
author_facet Limarino, C.
Tripaldi, A.
Marenssi, S.
Net, L.
Re, G.
Caselli, A.
author_sort Limarino, C.
title Tectonic control on the evolution of the fluvial systems of the Vinchina Formation (Miocene), northwestern Argentina
title_short Tectonic control on the evolution of the fluvial systems of the Vinchina Formation (Miocene), northwestern Argentina
title_full Tectonic control on the evolution of the fluvial systems of the Vinchina Formation (Miocene), northwestern Argentina
title_fullStr Tectonic control on the evolution of the fluvial systems of the Vinchina Formation (Miocene), northwestern Argentina
title_full_unstemmed Tectonic control on the evolution of the fluvial systems of the Vinchina Formation (Miocene), northwestern Argentina
title_sort tectonic control on the evolution of the fluvial systems of the vinchina formation (miocene), northwestern argentina
url http://hdl.handle.net/20.500.12110/paper_08959811_v14_n7_p751_Limarino
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