Sedimentology, ciclostratigraphy and sequence analysis of the La Manga Formation (Osfordian), Bardas Blancas, Mendoza

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The study of the carbonate-ramp deposits of La Manga Formation has allowed us to recognize three facies associations. The lithofacies association A is composed by five lithofacies (A1-A5). This association represents part of the transgressive systems tract. It corresponds to external ramp deposits,...

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Autores principales: Piethé, R.D., Palma, R.M.
Formato: JOUR
Materias:
Andes
Carbonate ramp
Jurassic
Neuquén Basin
carbonate ramp
depositional sequence
diagenesis
lithofacies
sedimentology
sequence stratigraphy
storm
Argentina
Bardas Blancas
Mendoza
Neuquen Basin
South America
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v63_n4_p682_Piethe
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v63_n4_p682_Piethe
record_format dspace
spelling todo:paper_00044822_v63_n4_p682_Piethe2023-10-03T13:58:25Z Sedimentology, ciclostratigraphy and sequence analysis of the La Manga Formation (Osfordian), Bardas Blancas, Mendoza Piethé, R.D. Palma, R.M. Andes Carbonate ramp Jurassic Neuquén Basin carbonate ramp depositional sequence diagenesis lithofacies sedimentology sequence stratigraphy storm Argentina Bardas Blancas Mendoza Neuquen Basin South America The study of the carbonate-ramp deposits of La Manga Formation has allowed us to recognize three facies associations. The lithofacies association A is composed by five lithofacies (A1-A5). This association represents part of the transgressive systems tract. It corresponds to external ramp deposits, accumulated below the storm-wave base. The A facies association appears in cycles of centimetric to decimetric thickness and belong to a retrograding parasequence set of 5th order. The lithofacies B association starts after an abrupt facies contact. It is characterized by six lithofacies (B1-B6). They are coarsening upward beds that form metric-scale cycles. These are interpreted as middle-ramp deposits dominated by storms. It corresponds to 4th order sequences. The lithofacies C includes three lithofacies (C1-C3). The small scale cycles were controlled by storm events, while the medium and large scale ones were likely originated by eustasy. The studied stratigraphic sections of La Manga Formation are included in two depostitional sequences SD-2 and SD-3. An abrupt discontinuity marks the beginning of the depositional sequence SD-2, which constitutes a transgressive system-tract, composed by a coarsening upward parasequence stacking set. Above a maximum flooding surface, manifested by a drastic change of facies, a low rate accommodation space period and a sea-level fall (characterized by a lowstand systems tract) are evidenced. The third depositional sequence SD-3 is composed by lagoon deposits. It starts after a paleokarstic surface, characterized by the development of a sheet-cake breccia and an intense vadose diagenesis. Fil:Piethé, R.D. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v63_n4_p682_Piethe
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Andes
Carbonate ramp
Jurassic
Neuquén Basin
carbonate ramp
depositional sequence
diagenesis
lithofacies
sedimentology
sequence stratigraphy
storm
Argentina
Bardas Blancas
Mendoza
Neuquen Basin
South America
spellingShingle Andes
Carbonate ramp
Jurassic
Neuquén Basin
carbonate ramp
depositional sequence
diagenesis
lithofacies
sedimentology
sequence stratigraphy
storm
Argentina
Bardas Blancas
Mendoza
Neuquen Basin
South America
Piethé, R.D.
Palma, R.M.
Sedimentology, ciclostratigraphy and sequence analysis of the La Manga Formation (Osfordian), Bardas Blancas, Mendoza
topic_facet Andes
Carbonate ramp
Jurassic
Neuquén Basin
carbonate ramp
depositional sequence
diagenesis
lithofacies
sedimentology
sequence stratigraphy
storm
Argentina
Bardas Blancas
Mendoza
Neuquen Basin
South America
description The study of the carbonate-ramp deposits of La Manga Formation has allowed us to recognize three facies associations. The lithofacies association A is composed by five lithofacies (A1-A5). This association represents part of the transgressive systems tract. It corresponds to external ramp deposits, accumulated below the storm-wave base. The A facies association appears in cycles of centimetric to decimetric thickness and belong to a retrograding parasequence set of 5th order. The lithofacies B association starts after an abrupt facies contact. It is characterized by six lithofacies (B1-B6). They are coarsening upward beds that form metric-scale cycles. These are interpreted as middle-ramp deposits dominated by storms. It corresponds to 4th order sequences. The lithofacies C includes three lithofacies (C1-C3). The small scale cycles were controlled by storm events, while the medium and large scale ones were likely originated by eustasy. The studied stratigraphic sections of La Manga Formation are included in two depostitional sequences SD-2 and SD-3. An abrupt discontinuity marks the beginning of the depositional sequence SD-2, which constitutes a transgressive system-tract, composed by a coarsening upward parasequence stacking set. Above a maximum flooding surface, manifested by a drastic change of facies, a low rate accommodation space period and a sea-level fall (characterized by a lowstand systems tract) are evidenced. The third depositional sequence SD-3 is composed by lagoon deposits. It starts after a paleokarstic surface, characterized by the development of a sheet-cake breccia and an intense vadose diagenesis.
format JOUR
author Piethé, R.D.
Palma, R.M.
author_facet Piethé, R.D.
Palma, R.M.
author_sort Piethé, R.D.
title Sedimentology, ciclostratigraphy and sequence analysis of the La Manga Formation (Osfordian), Bardas Blancas, Mendoza
title_short Sedimentology, ciclostratigraphy and sequence analysis of the La Manga Formation (Osfordian), Bardas Blancas, Mendoza
title_full Sedimentology, ciclostratigraphy and sequence analysis of the La Manga Formation (Osfordian), Bardas Blancas, Mendoza
title_fullStr Sedimentology, ciclostratigraphy and sequence analysis of the La Manga Formation (Osfordian), Bardas Blancas, Mendoza
title_full_unstemmed Sedimentology, ciclostratigraphy and sequence analysis of the La Manga Formation (Osfordian), Bardas Blancas, Mendoza
title_sort sedimentology, ciclostratigraphy and sequence analysis of the la manga formation (osfordian), bardas blancas, mendoza
url http://hdl.handle.net/20.500.12110/paper_00044822_v63_n4_p682_Piethe
work_keys_str_mv AT pietherd sedimentologyciclostratigraphyandsequenceanalysisofthelamangaformationosfordianbardasblancasmendoza
AT palmarm sedimentologyciclostratigraphyandsequenceanalysisofthelamangaformationosfordianbardasblancasmendoza
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