Evolution of a patagonian Miocene intermontane basin and its relationship with the Andean foreland: tectono-stratigraphic evidences from the Catán Lil Basin, Argentina

The Catan Lil Basin is an intermontane basin developed on the wedge top of the Miocene North Patagonian retro-arc foreland basin. This basin is formed by the growth of a west verging thick skinned fold and thrust belt. An internal anticline divides the basin into two sub-basins: Las Coloradas and Lo...

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Autores principales: Franzese, Juan Rafael, D'Elia, Leandro, Bilmes, Andrés, Bucher, Joaquín, García, Micaela Romina, López, Manuel, Muravchik, Martín, Hernández, Mariano
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Geología
Retro-arc foreland system
Intermontane basins
Tectono-stratigraphy
Patagonia
Andes
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127810
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-127810
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Retro-arc foreland system
Intermontane basins
Tectono-stratigraphy
Patagonia
Andes
spellingShingle Geología
Retro-arc foreland system
Intermontane basins
Tectono-stratigraphy
Patagonia
Andes
Franzese, Juan Rafael
D'Elia, Leandro
Bilmes, Andrés
Bucher, Joaquín
García, Micaela Romina
López, Manuel
Muravchik, Martín
Hernández, Mariano
Evolution of a patagonian Miocene intermontane basin and its relationship with the Andean foreland: tectono-stratigraphic evidences from the Catán Lil Basin, Argentina
topic_facet Geología
Retro-arc foreland system
Intermontane basins
Tectono-stratigraphy
Patagonia
Andes
description The Catan Lil Basin is an intermontane basin developed on the wedge top of the Miocene North Patagonian retro-arc foreland basin. This basin is formed by the growth of a west verging thick skinned fold and thrust belt. An internal anticline divides the basin into two sub-basins: Las Coloradas and Los Remolinos, with other minor isolated depocentre (La Esperanza Syncline). Due to the structural configuration the basin evolved as a compartmentalized basin, connected with an extrabasinal drainage network. Structural and sedimentological analysis of field data enable us to determine that the basin was filled in four sequences (DS-I, DS-II, DS-III and DS-IV) that recorded three major aggradational/degradational cycles characterized by alluvial-fluvial sedimentation and a final volcanic succession of olivinic basalts. The first two sequences (DS-I and DS-II) integrate a growth wedge related to tectonic uplift and limb rotation of the main anticlines. DS-III and DS-IV were deposited under post-kinematic conditions when there was no more tectonic activity in the fold and thrust belt. There is a strong difference in composition between the first sequence DS-I and the others. DS-I is composed by volcaniclastic sandstones, conglomerates and paleosols. The two other sedimentary sequences (DS-II and DS-III) are composed of purely epiclastic material. This sedimentary succession can be defined as compound valley fill occurred under general low accommodation conditions with a progressive reduction of A/S during basin evolution. The DS-IV corresponds to a volcanic plateau associated with an upper Miocene basaltic retro-arc volcanism. A new 39Ar/40Ar age for the basalts is presented in this paper that constrains the end of deposition in the Catan Lil Basin to the Upper Miocene (8.5 Ma). After this basaltic event, the foreland turned towards an erosional by-pass system in the study area.
format Articulo
Articulo
author Franzese, Juan Rafael
D'Elia, Leandro
Bilmes, Andrés
Bucher, Joaquín
García, Micaela Romina
López, Manuel
Muravchik, Martín
Hernández, Mariano
author_facet Franzese, Juan Rafael
D'Elia, Leandro
Bilmes, Andrés
Bucher, Joaquín
García, Micaela Romina
López, Manuel
Muravchik, Martín
Hernández, Mariano
author_sort Franzese, Juan Rafael
title Evolution of a patagonian Miocene intermontane basin and its relationship with the Andean foreland: tectono-stratigraphic evidences from the Catán Lil Basin, Argentina
title_short Evolution of a patagonian Miocene intermontane basin and its relationship with the Andean foreland: tectono-stratigraphic evidences from the Catán Lil Basin, Argentina
title_full Evolution of a patagonian Miocene intermontane basin and its relationship with the Andean foreland: tectono-stratigraphic evidences from the Catán Lil Basin, Argentina
title_fullStr Evolution of a patagonian Miocene intermontane basin and its relationship with the Andean foreland: tectono-stratigraphic evidences from the Catán Lil Basin, Argentina
title_full_unstemmed Evolution of a patagonian Miocene intermontane basin and its relationship with the Andean foreland: tectono-stratigraphic evidences from the Catán Lil Basin, Argentina
title_sort evolution of a patagonian miocene intermontane basin and its relationship with the andean foreland: tectono-stratigraphic evidences from the catán lil basin, argentina
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/127810
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