An unusual oxygen-deficient ichnofauna from the Vaca Muerta Formation: Implications for the ichnofacies model

Autores
Paz, Maximiliano; Mángano, M. Gabriela; Buatois, Luis A.; Desjardins, Patricio R.; Minisini, Daniel; González Tomassini, Federico; Rodriguez, Maximiliano Nicolás; Pereira, Egberto; Parada, Martín Nazareno
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In most oxygen-deficient ancient successions, Chondrites and Zoophycos are typical and recurrent trace fossils that are the last to disappear during deoxygenation events. Here, we report an unusual case of an oxygen-deficient ichnofauna lacking Chondrites and showing scarce Zoophycos, from the Upper Jurassic-Lower Cretaceous Vaca Muerta Formation of Argentina. One outcrop and cores from nine wells were analysed. The succession comprises fine-grained, mixed carbonate-siliciclastic deposits accumu-lated in marginal-marine, basin, drift, slope, and outer ramp environments. It displays abundant biodeformational structures mostly producing irregular-laminated and mas-sive fabrics in fine to medium mudstone. However, discrete trace fossils can be found within interbedded coarser-grained intervals, namely (in order of decreased ichnogen-era abundance), Teichichnus, Alcyonidiopsis, Coprulus, Phycosiphon, Planolites, Lockeia, Thalassinoides, Palaeophycus, Nereites, Crininicaminus, Zoophycos, Diplocraterion, and?Skolithos. Considering all ichnotaxa, the Vaca Muerta Formation may be seen as host-ing a relatively diverse ichnofauna, yet, this is misleading because most occurrences are of low diversity. This atypical ichnofauna may be explained by either a lack of strong sea-sonality and existence of background food-rich environments, or by salinity variations, precluding the specialized feeding style of the Chondrites and Zoophycos producers. The dominance of feeding trace fossils with spreite (Teichichnus) and the low ichnodiversity suggest that the studied ichnofauna belongs to the Zoophycos Ichnofacies.
Fil: Paz, Maximiliano. University of Saskatchewan; Canadá
Fil: Mángano, M. Gabriela. University of Saskatchewan; Canadá
Fil: Buatois, Luis A.. University of Saskatchewan; Canadá
Fil: Desjardins, Patricio R.. Shell Exploration And Production Company; Estados Unidos
Fil: Minisini, Daniel. Shell Technology Center Houston; Estados Unidos. Rice University; Estados Unidos
Fil: González Tomassini, Federico. Phoenix Global Resources; Argentina
Fil: Rodriguez, Maximiliano Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
Fil: Pereira, Egberto. Universidade do Estado de Rio do Janeiro; Brasil
Fil: Parada, Martín Nazareno. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
Materia
Mudstone
Chondrites
Cryptobioturbation
Zoophycos Ichnofacies
Ichnology
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/227451
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/227451
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling An unusual oxygen-deficient ichnofauna from the Vaca Muerta Formation: Implications for the ichnofacies modelPaz, MaximilianoMángano, M. GabrielaBuatois, Luis A.Desjardins, Patricio R.Minisini, DanielGonzález Tomassini, FedericoRodriguez, Maximiliano NicolásPereira, EgbertoParada, Martín NazarenoMudstoneChondritesCryptobioturbationZoophycos IchnofaciesIchnologyhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1In most oxygen-deficient ancient successions, Chondrites and Zoophycos are typical and recurrent trace fossils that are the last to disappear during deoxygenation events. Here, we report an unusual case of an oxygen-deficient ichnofauna lacking Chondrites and showing scarce Zoophycos, from the Upper Jurassic-Lower Cretaceous Vaca Muerta Formation of Argentina. One outcrop and cores from nine wells were analysed. The succession comprises fine-grained, mixed carbonate-siliciclastic deposits accumu-lated in marginal-marine, basin, drift, slope, and outer ramp environments. It displays abundant biodeformational structures mostly producing irregular-laminated and mas-sive fabrics in fine to medium mudstone. However, discrete trace fossils can be found within interbedded coarser-grained intervals, namely (in order of decreased ichnogen-era abundance), Teichichnus, Alcyonidiopsis, Coprulus, Phycosiphon, Planolites, Lockeia, Thalassinoides, Palaeophycus, Nereites, Crininicaminus, Zoophycos, Diplocraterion, and?Skolithos. Considering all ichnotaxa, the Vaca Muerta Formation may be seen as host-ing a relatively diverse ichnofauna, yet, this is misleading because most occurrences are of low diversity. This atypical ichnofauna may be explained by either a lack of strong sea-sonality and existence of background food-rich environments, or by salinity variations, precluding the specialized feeding style of the Chondrites and Zoophycos producers. The dominance of feeding trace fossils with spreite (Teichichnus) and the low ichnodiversity suggest that the studied ichnofauna belongs to the Zoophycos Ichnofacies.Fil: Paz, Maximiliano. University of Saskatchewan; CanadáFil: Mángano, M. Gabriela. University of Saskatchewan; CanadáFil: Buatois, Luis A.. University of Saskatchewan; CanadáFil: Desjardins, Patricio R.. Shell Exploration And Production Company; Estados UnidosFil: Minisini, Daniel. Shell Technology Center Houston; Estados Unidos. Rice University; Estados UnidosFil: González Tomassini, Federico. Phoenix Global Resources; ArgentinaFil: Rodriguez, Maximiliano Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; ArgentinaFil: Pereira, Egberto. Universidade do Estado de Rio do Janeiro; BrasilFil: Parada, Martín Nazareno. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; ArgentinaWiley Blackwell Publishing, Inc2023-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/227451Paz, Maximiliano; Mángano, M. Gabriela; Buatois, Luis A.; Desjardins, Patricio R.; Minisini, Daniel; et al.; An unusual oxygen-deficient ichnofauna from the Vaca Muerta Formation: Implications for the ichnofacies model; Wiley Blackwell Publishing, Inc; Lethaia; 56; 4; 12-2023; 1-310024-1164CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.idunn.no/doi/10.18261/let.56.4.5info:eu-repo/semantics/altIdentifier/doi/10.18261/let.56.4.5info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:02:07Zoai:ri.conicet.gov.ar:11336/227451instacron: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 10:02:07.336CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv An unusual oxygen-deficient ichnofauna from the Vaca Muerta Formation: Implications for the ichnofacies model
title An unusual oxygen-deficient ichnofauna from the Vaca Muerta Formation: Implications for the ichnofacies model
spellingShingle An unusual oxygen-deficient ichnofauna from the Vaca Muerta Formation: Implications for the ichnofacies model
Paz, Maximiliano
Mudstone
Chondrites
Cryptobioturbation
Zoophycos Ichnofacies
Ichnology
title_short An unusual oxygen-deficient ichnofauna from the Vaca Muerta Formation: Implications for the ichnofacies model
title_full An unusual oxygen-deficient ichnofauna from the Vaca Muerta Formation: Implications for the ichnofacies model
title_fullStr An unusual oxygen-deficient ichnofauna from the Vaca Muerta Formation: Implications for the ichnofacies model
title_full_unstemmed An unusual oxygen-deficient ichnofauna from the Vaca Muerta Formation: Implications for the ichnofacies model
title_sort An unusual oxygen-deficient ichnofauna from the Vaca Muerta Formation: Implications for the ichnofacies model
dc.creator.none.fl_str_mv Paz, Maximiliano
Mángano, M. Gabriela
Buatois, Luis A.
Desjardins, Patricio R.
Minisini, Daniel
González Tomassini, Federico
Rodriguez, Maximiliano Nicolás
Pereira, Egberto
Parada, Martín Nazareno
author Paz, Maximiliano
author_facet Paz, Maximiliano
Mángano, M. Gabriela
Buatois, Luis A.
Desjardins, Patricio R.
Minisini, Daniel
González Tomassini, Federico
Rodriguez, Maximiliano Nicolás
Pereira, Egberto
Parada, Martín Nazareno
author_role author
author2 Mángano, M. Gabriela
Buatois, Luis A.
Desjardins, Patricio R.
Minisini, Daniel
González Tomassini, Federico
Rodriguez, Maximiliano Nicolás
Pereira, Egberto
Parada, Martín Nazareno
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Mudstone
Chondrites
Cryptobioturbation
Zoophycos Ichnofacies
Ichnology
topic Mudstone
Chondrites
Cryptobioturbation
Zoophycos Ichnofacies
Ichnology
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In most oxygen-deficient ancient successions, Chondrites and Zoophycos are typical and recurrent trace fossils that are the last to disappear during deoxygenation events. Here, we report an unusual case of an oxygen-deficient ichnofauna lacking Chondrites and showing scarce Zoophycos, from the Upper Jurassic-Lower Cretaceous Vaca Muerta Formation of Argentina. One outcrop and cores from nine wells were analysed. The succession comprises fine-grained, mixed carbonate-siliciclastic deposits accumu-lated in marginal-marine, basin, drift, slope, and outer ramp environments. It displays abundant biodeformational structures mostly producing irregular-laminated and mas-sive fabrics in fine to medium mudstone. However, discrete trace fossils can be found within interbedded coarser-grained intervals, namely (in order of decreased ichnogen-era abundance), Teichichnus, Alcyonidiopsis, Coprulus, Phycosiphon, Planolites, Lockeia, Thalassinoides, Palaeophycus, Nereites, Crininicaminus, Zoophycos, Diplocraterion, and?Skolithos. Considering all ichnotaxa, the Vaca Muerta Formation may be seen as host-ing a relatively diverse ichnofauna, yet, this is misleading because most occurrences are of low diversity. This atypical ichnofauna may be explained by either a lack of strong sea-sonality and existence of background food-rich environments, or by salinity variations, precluding the specialized feeding style of the Chondrites and Zoophycos producers. The dominance of feeding trace fossils with spreite (Teichichnus) and the low ichnodiversity suggest that the studied ichnofauna belongs to the Zoophycos Ichnofacies.
Fil: Paz, Maximiliano. University of Saskatchewan; Canadá
Fil: Mángano, M. Gabriela. University of Saskatchewan; Canadá
Fil: Buatois, Luis A.. University of Saskatchewan; Canadá
Fil: Desjardins, Patricio R.. Shell Exploration And Production Company; Estados Unidos
Fil: Minisini, Daniel. Shell Technology Center Houston; Estados Unidos. Rice University; Estados Unidos
Fil: González Tomassini, Federico. Phoenix Global Resources; Argentina
Fil: Rodriguez, Maximiliano Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
Fil: Pereira, Egberto. Universidade do Estado de Rio do Janeiro; Brasil
Fil: Parada, Martín Nazareno. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
description In most oxygen-deficient ancient successions, Chondrites and Zoophycos are typical and recurrent trace fossils that are the last to disappear during deoxygenation events. Here, we report an unusual case of an oxygen-deficient ichnofauna lacking Chondrites and showing scarce Zoophycos, from the Upper Jurassic-Lower Cretaceous Vaca Muerta Formation of Argentina. One outcrop and cores from nine wells were analysed. The succession comprises fine-grained, mixed carbonate-siliciclastic deposits accumu-lated in marginal-marine, basin, drift, slope, and outer ramp environments. It displays abundant biodeformational structures mostly producing irregular-laminated and mas-sive fabrics in fine to medium mudstone. However, discrete trace fossils can be found within interbedded coarser-grained intervals, namely (in order of decreased ichnogen-era abundance), Teichichnus, Alcyonidiopsis, Coprulus, Phycosiphon, Planolites, Lockeia, Thalassinoides, Palaeophycus, Nereites, Crininicaminus, Zoophycos, Diplocraterion, and?Skolithos. Considering all ichnotaxa, the Vaca Muerta Formation may be seen as host-ing a relatively diverse ichnofauna, yet, this is misleading because most occurrences are of low diversity. This atypical ichnofauna may be explained by either a lack of strong sea-sonality and existence of background food-rich environments, or by salinity variations, precluding the specialized feeding style of the Chondrites and Zoophycos producers. The dominance of feeding trace fossils with spreite (Teichichnus) and the low ichnodiversity suggest that the studied ichnofauna belongs to the Zoophycos Ichnofacies.
publishDate 2023
dc.date.none.fl_str_mv 2023-12
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/11336/227451
Paz, Maximiliano; Mángano, M. Gabriela; Buatois, Luis A.; Desjardins, Patricio R.; Minisini, Daniel; et al.; An unusual oxygen-deficient ichnofauna from the Vaca Muerta Formation: Implications for the ichnofacies model; Wiley Blackwell Publishing, Inc; Lethaia; 56; 4; 12-2023; 1-31
0024-1164
CONICET Digital
CONICET
url http://hdl.handle.net/11336/227451
identifier_str_mv Paz, Maximiliano; Mángano, M. Gabriela; Buatois, Luis A.; Desjardins, Patricio R.; Minisini, Daniel; et al.; An unusual oxygen-deficient ichnofauna from the Vaca Muerta Formation: Implications for the ichnofacies model; Wiley Blackwell Publishing, Inc; Lethaia; 56; 4; 12-2023; 1-31
0024-1164
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://www.idunn.no/doi/10.18261/let.56.4.5
info:eu-repo/semantics/altIdentifier/doi/10.18261/let.56.4.5
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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
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score 13.13397

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