Facies analysis and stratigraphic assignment of Middle Jurassic unnamed fluvial deposits in the Southern Mendoza Neuquén Basin
Stratigraphic-sedimentological studies were performed on Middle Jurassic unnamed fluvial deposits of the Southern Mendoza Neuquén Basin, cropping out in the Malargüe anticline and Bardas Blancas. In the first area we recognized braided fluvial systems facies stacked in three depositional sequences s...
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v73_n1_p104_Kietzmann http://hdl.handle.net/20.500.12110/paper_00044822_v73_n1_p104_Kietzmann |
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paper:paper_00044822_v73_n1_p104_Kietzmann2023-06-08T14:26:49Z Facies analysis and stratigraphic assignment of Middle Jurassic unnamed fluvial deposits in the Southern Mendoza Neuquén Basin Kietzmann, Diego Alejandro Palma, Ricardo Manuel Fluvial Lajas formation Lotena formation Sequence stratigraphy braided river depositional sequence facies analysis fluvial deposit Jurassic sequence stratigraphy stratigraphic correlation stratotype unconformity Argentina Mendoza Neuquen Basin Stratigraphic-sedimentological studies were performed on Middle Jurassic unnamed fluvial deposits of the Southern Mendoza Neuquén Basin, cropping out in the Malargüe anticline and Bardas Blancas. In the first area we recognized braided fluvial systems facies stacked in three depositional sequences showing a gradual decrease in the accommodation space, whereas in the second we recognized anastomosing fluvial systems facies grouped into two depositional sequences with a progressive increase in the accommodation space. Stratigraphic relationships and stacking pattern in the Malargüe anticline suggests the assignment of this unit to the late Bajocian-Bathonian and its correlation with the Lajas Formation, so the name of Puesto Pacheco Formation nov. nom. is proposed, with its stratotype in the Loncoche creek section. In the Bardas Blancas area the presence of limestone clasts and oysters fragments at the base of the unit, would establish that unnamed fluvial deposits would have been deposited after the Intracallovian unconformity. In this area it is given a middle-late Callovian age and the assignment to the Lotena Formation. © 2016, Asociacion Geologica Argentina. All rights reserved. Fil:Kietzmann, D.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Palma, R.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v73_n1_p104_Kietzmann http://hdl.handle.net/20.500.12110/paper_00044822_v73_n1_p104_Kietzmann |
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 Lajas formation Lotena formation Sequence stratigraphy braided river depositional sequence facies analysis fluvial deposit Jurassic sequence stratigraphy stratigraphic correlation stratotype unconformity Argentina Mendoza Neuquen Basin |
spellingShingle |
Fluvial Lajas formation Lotena formation Sequence stratigraphy braided river depositional sequence facies analysis fluvial deposit Jurassic sequence stratigraphy stratigraphic correlation stratotype unconformity Argentina Mendoza Neuquen Basin Kietzmann, Diego Alejandro Palma, Ricardo Manuel Facies analysis and stratigraphic assignment of Middle Jurassic unnamed fluvial deposits in the Southern Mendoza Neuquén Basin |
topic_facet |
Fluvial Lajas formation Lotena formation Sequence stratigraphy braided river depositional sequence facies analysis fluvial deposit Jurassic sequence stratigraphy stratigraphic correlation stratotype unconformity Argentina Mendoza Neuquen Basin |
description |
Stratigraphic-sedimentological studies were performed on Middle Jurassic unnamed fluvial deposits of the Southern Mendoza Neuquén Basin, cropping out in the Malargüe anticline and Bardas Blancas. In the first area we recognized braided fluvial systems facies stacked in three depositional sequences showing a gradual decrease in the accommodation space, whereas in the second we recognized anastomosing fluvial systems facies grouped into two depositional sequences with a progressive increase in the accommodation space. Stratigraphic relationships and stacking pattern in the Malargüe anticline suggests the assignment of this unit to the late Bajocian-Bathonian and its correlation with the Lajas Formation, so the name of Puesto Pacheco Formation nov. nom. is proposed, with its stratotype in the Loncoche creek section. In the Bardas Blancas area the presence of limestone clasts and oysters fragments at the base of the unit, would establish that unnamed fluvial deposits would have been deposited after the Intracallovian unconformity. In this area it is given a middle-late Callovian age and the assignment to the Lotena Formation. © 2016, Asociacion Geologica Argentina. All rights reserved. |
author |
Kietzmann, Diego Alejandro Palma, Ricardo Manuel |
author_facet |
Kietzmann, Diego Alejandro Palma, Ricardo Manuel |
author_sort |
Kietzmann, Diego Alejandro |
title |
Facies analysis and stratigraphic assignment of Middle Jurassic unnamed fluvial deposits in the Southern Mendoza Neuquén Basin |
title_short |
Facies analysis and stratigraphic assignment of Middle Jurassic unnamed fluvial deposits in the Southern Mendoza Neuquén Basin |
title_full |
Facies analysis and stratigraphic assignment of Middle Jurassic unnamed fluvial deposits in the Southern Mendoza Neuquén Basin |
title_fullStr |
Facies analysis and stratigraphic assignment of Middle Jurassic unnamed fluvial deposits in the Southern Mendoza Neuquén Basin |
title_full_unstemmed |
Facies analysis and stratigraphic assignment of Middle Jurassic unnamed fluvial deposits in the Southern Mendoza Neuquén Basin |
title_sort |
facies analysis and stratigraphic assignment of middle jurassic unnamed fluvial deposits in the southern mendoza neuquén basin |
publishDate |
2016 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v73_n1_p104_Kietzmann http://hdl.handle.net/20.500.12110/paper_00044822_v73_n1_p104_Kietzmann |
work_keys_str_mv |
AT kietzmanndiegoalejandro faciesanalysisandstratigraphicassignmentofmiddlejurassicunnamedfluvialdepositsinthesouthernmendozaneuquenbasin AT palmaricardomanuel faciesanalysisandstratigraphicassignmentofmiddlejurassicunnamedfluvialdepositsinthesouthernmendozaneuquenbasin |
_version_ |
1768541872948510720 |