Sedimentological and ichnological signatures from a fluvial-dominated delta in subsurface: lajas formation, Middle Jurassic, Neuquén basin, Argentina

Autores
Arregui, Mariano Germán; Rodriguez, Elizabeth
Año de publicación
2022
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Transitional marine systems are affected by the interaction of wave, tidal and fluvialprocesses, with different impacts on salinity, turbidity, energy and depositionalrate. Benthic organisms are influenced by these processes, and so, the ichnologicalsignatures of these deposits represent key elements for environmental analysis.The Lajas Formation (Middle Jurassic, Neuquén Basin Argentina) is characterizedby deposits accumulated in shallow transitional marine environments, mainlydeltaic systems. A detailed study of sedimentological and ichnological features ofthe Lajas Formation developed on subsurface core samples allows to reconstructthe depositional conditions and evolution of unit and determine that the prevalentprocesses on the reworking of the sediments is fluvial, with subordinated waveprocesses. Fourteen sedimentary facies were defined, grouped into five faciesassociations: interdistributary plain, distributary channels, fairweather and stormgeneratedwaves bars, delta front mouth bars, and prodelta. The ichnologicalanalysis allows to differentiate 21 trace fossils: representing 5 ichnofacies: Skolithos(Mararonichnus suite), Skolithos (or Rosellia), impoverished Cruziana, Cruziana,Scoyenia and Zoophycos. Two surfaces with Glossifungites suites were recognized,and they are interpreted in two different ways, one related to authigenic changes andthe other as a surface of stratigraphic importance, related to the variation in sea level.Finally, the whole section studied constitutes a prograding fluvio-dominated deltaicsystem, representing a Highstand System Tract, with minor transgressive events.
Fil: Arregui, Mariano Germán. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. YPF - Tecnología; Argentina
Fil: Rodriguez, Elizabeth. YPF - Tecnología; Argentina
Materia
Lajas Formation
Bioturbation
Deltas
Trace fossils
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/204989
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Sedimentological and ichnological signatures from a fluvial-dominated delta in subsurface: lajas formation, Middle Jurassic, Neuquén basin, ArgentinaArregui, Mariano GermánRodriguez, ElizabethLajas FormationBioturbationDeltasTrace fossilshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Transitional marine systems are affected by the interaction of wave, tidal and fluvialprocesses, with different impacts on salinity, turbidity, energy and depositionalrate. Benthic organisms are influenced by these processes, and so, the ichnologicalsignatures of these deposits represent key elements for environmental analysis.The Lajas Formation (Middle Jurassic, Neuquén Basin Argentina) is characterizedby deposits accumulated in shallow transitional marine environments, mainlydeltaic systems. A detailed study of sedimentological and ichnological features ofthe Lajas Formation developed on subsurface core samples allows to reconstructthe depositional conditions and evolution of unit and determine that the prevalentprocesses on the reworking of the sediments is fluvial, with subordinated waveprocesses. Fourteen sedimentary facies were defined, grouped into five faciesassociations: interdistributary plain, distributary channels, fairweather and stormgeneratedwaves bars, delta front mouth bars, and prodelta. The ichnologicalanalysis allows to differentiate 21 trace fossils: representing 5 ichnofacies: Skolithos(Mararonichnus suite), Skolithos (or Rosellia), impoverished Cruziana, Cruziana,Scoyenia and Zoophycos. Two surfaces with Glossifungites suites were recognized,and they are interpreted in two different ways, one related to authigenic changes andthe other as a surface of stratigraphic importance, related to the variation in sea level.Finally, the whole section studied constitutes a prograding fluvio-dominated deltaicsystem, representing a Highstand System Tract, with minor transgressive events.Fil: Arregui, Mariano Germán. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. YPF - Tecnología; ArgentinaFil: Rodriguez, Elizabeth. YPF - Tecnología; ArgentinaAsociación Argentina de Sedimentología2022-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/204989Arregui, Mariano Germán; Rodriguez, Elizabeth; Sedimentological and ichnological signatures from a fluvial-dominated delta in subsurface: lajas formation, Middle Jurassic, Neuquén basin, Argentina; Asociación Argentina de Sedimentología; Latin American Journal of Sedimentology and Basin Analysis; 29; 2; 12-2022; 97-1201851-4979CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://lajsba.sedimentologia.org.ar/index.php/lajsba/article/view/221info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:06:01Zoai:ri.conicet.gov.ar:11336/204989instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:06:01.952CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Sedimentological and ichnological signatures from a fluvial-dominated delta in subsurface: lajas formation, Middle Jurassic, Neuquén basin, Argentina
title Sedimentological and ichnological signatures from a fluvial-dominated delta in subsurface: lajas formation, Middle Jurassic, Neuquén basin, Argentina
spellingShingle Sedimentological and ichnological signatures from a fluvial-dominated delta in subsurface: lajas formation, Middle Jurassic, Neuquén basin, Argentina
Arregui, Mariano Germán
Lajas Formation
Bioturbation
Deltas
Trace fossils
title_short Sedimentological and ichnological signatures from a fluvial-dominated delta in subsurface: lajas formation, Middle Jurassic, Neuquén basin, Argentina
title_full Sedimentological and ichnological signatures from a fluvial-dominated delta in subsurface: lajas formation, Middle Jurassic, Neuquén basin, Argentina
title_fullStr Sedimentological and ichnological signatures from a fluvial-dominated delta in subsurface: lajas formation, Middle Jurassic, Neuquén basin, Argentina
title_full_unstemmed Sedimentological and ichnological signatures from a fluvial-dominated delta in subsurface: lajas formation, Middle Jurassic, Neuquén basin, Argentina
title_sort Sedimentological and ichnological signatures from a fluvial-dominated delta in subsurface: lajas formation, Middle Jurassic, Neuquén basin, Argentina
dc.creator.none.fl_str_mv Arregui, Mariano Germán
Rodriguez, Elizabeth
author Arregui, Mariano Germán
author_facet Arregui, Mariano Germán
Rodriguez, Elizabeth
author_role author
author2 Rodriguez, Elizabeth
author2_role author
dc.subject.none.fl_str_mv Lajas Formation
Bioturbation
Deltas
Trace fossils
topic Lajas Formation
Bioturbation
Deltas
Trace fossils
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Transitional marine systems are affected by the interaction of wave, tidal and fluvialprocesses, with different impacts on salinity, turbidity, energy and depositionalrate. Benthic organisms are influenced by these processes, and so, the ichnologicalsignatures of these deposits represent key elements for environmental analysis.The Lajas Formation (Middle Jurassic, Neuquén Basin Argentina) is characterizedby deposits accumulated in shallow transitional marine environments, mainlydeltaic systems. A detailed study of sedimentological and ichnological features ofthe Lajas Formation developed on subsurface core samples allows to reconstructthe depositional conditions and evolution of unit and determine that the prevalentprocesses on the reworking of the sediments is fluvial, with subordinated waveprocesses. Fourteen sedimentary facies were defined, grouped into five faciesassociations: interdistributary plain, distributary channels, fairweather and stormgeneratedwaves bars, delta front mouth bars, and prodelta. The ichnologicalanalysis allows to differentiate 21 trace fossils: representing 5 ichnofacies: Skolithos(Mararonichnus suite), Skolithos (or Rosellia), impoverished Cruziana, Cruziana,Scoyenia and Zoophycos. Two surfaces with Glossifungites suites were recognized,and they are interpreted in two different ways, one related to authigenic changes andthe other as a surface of stratigraphic importance, related to the variation in sea level.Finally, the whole section studied constitutes a prograding fluvio-dominated deltaicsystem, representing a Highstand System Tract, with minor transgressive events.
Fil: Arregui, Mariano Germán. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. YPF - Tecnología; Argentina
Fil: Rodriguez, Elizabeth. YPF - Tecnología; Argentina
description Transitional marine systems are affected by the interaction of wave, tidal and fluvialprocesses, with different impacts on salinity, turbidity, energy and depositionalrate. Benthic organisms are influenced by these processes, and so, the ichnologicalsignatures of these deposits represent key elements for environmental analysis.The Lajas Formation (Middle Jurassic, Neuquén Basin Argentina) is characterizedby deposits accumulated in shallow transitional marine environments, mainlydeltaic systems. A detailed study of sedimentological and ichnological features ofthe Lajas Formation developed on subsurface core samples allows to reconstructthe depositional conditions and evolution of unit and determine that the prevalentprocesses on the reworking of the sediments is fluvial, with subordinated waveprocesses. Fourteen sedimentary facies were defined, grouped into five faciesassociations: interdistributary plain, distributary channels, fairweather and stormgeneratedwaves bars, delta front mouth bars, and prodelta. The ichnologicalanalysis allows to differentiate 21 trace fossils: representing 5 ichnofacies: Skolithos(Mararonichnus suite), Skolithos (or Rosellia), impoverished Cruziana, Cruziana,Scoyenia and Zoophycos. Two surfaces with Glossifungites suites were recognized,and they are interpreted in two different ways, one related to authigenic changes andthe other as a surface of stratigraphic importance, related to the variation in sea level.Finally, the whole section studied constitutes a prograding fluvio-dominated deltaicsystem, representing a Highstand System Tract, with minor transgressive events.
publishDate 2022
dc.date.none.fl_str_mv 2022-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/204989
Arregui, Mariano Germán; Rodriguez, Elizabeth; Sedimentological and ichnological signatures from a fluvial-dominated delta in subsurface: lajas formation, Middle Jurassic, Neuquén basin, Argentina; Asociación Argentina de Sedimentología; Latin American Journal of Sedimentology and Basin Analysis; 29; 2; 12-2022; 97-120
1851-4979
CONICET Digital
CONICET
url http://hdl.handle.net/11336/204989
identifier_str_mv Arregui, Mariano Germán; Rodriguez, Elizabeth; Sedimentological and ichnological signatures from a fluvial-dominated delta in subsurface: lajas formation, Middle Jurassic, Neuquén basin, Argentina; Asociación Argentina de Sedimentología; Latin American Journal of Sedimentology and Basin Analysis; 29; 2; 12-2022; 97-120
1851-4979
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://lajsba.sedimentologia.org.ar/index.php/lajsba/article/view/221
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Asociación Argentina de Sedimentología
publisher.none.fl_str_mv Asociación Argentina de Sedimentología
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842269938884018176
score 13.13397

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