Bajo de Veliz stromatolites revisited

Autores
Benavente, Cecilia Andrea; Mancuso, Adriana Cecilia; Crespo, Esteban María
Año de publicación
2019
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The discussion about the true biogenicity of Ca-rich deposits has been extensive, and in the past, abiogenic structures have been referred tostromatolites when their origin was linked to inorganic precipitation of carbonate. Later on, different types of carbonate precipitation have beendescribed including: mineralization (inorganic); and biogenic precipitation of carbonates, namely: biologically controlled, biologically induced andbiologically influenced mineralization. The Bajo de Véliz subbasin, located on the east margin of the Paganzo Basin, in the NE of San Luis province,presents the Bajo de Véliz Formation, referred to as Permian. The unit is a siliciclastic succession, well known by its extraordinary fossiliferouscontent and includes carbonate levels. The carbonates have been previously described as stromatolites based on microfacies analysis with theidentification of bryophyte and cyanobacteria as producers. Nevertheless, new polished sections and thin section microfacies analysis under lowmagnification binocular microscope along with SEM - EDS analysis shows no trace of biogenicity at a microstructure level. New data shows that themicrofabric is formed by a combination of Ca-rich parallel and subparallel veins (spar), included in a Si-rich matrix with Fe content. Thesemicrostructures were previously identified as bryophyte remains but no feature other than morphological resemblance was found. This points to agenesis linked to a probable carbonate rich seep that caused Ca and Si mineralization in the form of complex dendrites. Further cathodoluminescenceanalysis can confirm the timing and different phases of mineralization and if there was incremental growth.1
Fil: Benavente, Cecilia Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Mancuso, Adriana Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Crespo, Esteban María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; Argentina. Universidad Nacional de San Luis; Argentina
Reunión de Comunicaciones de la Asociación Paleontológica Argentina
Puerto Madryn
Argentina
Asociación Paleontológica Argentina
Materia
Permian
Stromatolites
Ca-rich
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:11336/234928
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/234928
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Bajo de Veliz stromatolites revisitedBenavente, Cecilia AndreaMancuso, Adriana CeciliaCrespo, Esteban MaríaPermianStromatolitesCa-richhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The discussion about the true biogenicity of Ca-rich deposits has been extensive, and in the past, abiogenic structures have been referred tostromatolites when their origin was linked to inorganic precipitation of carbonate. Later on, different types of carbonate precipitation have beendescribed including: mineralization (inorganic); and biogenic precipitation of carbonates, namely: biologically controlled, biologically induced andbiologically influenced mineralization. The Bajo de Véliz subbasin, located on the east margin of the Paganzo Basin, in the NE of San Luis province,presents the Bajo de Véliz Formation, referred to as Permian. The unit is a siliciclastic succession, well known by its extraordinary fossiliferouscontent and includes carbonate levels. The carbonates have been previously described as stromatolites based on microfacies analysis with theidentification of bryophyte and cyanobacteria as producers. Nevertheless, new polished sections and thin section microfacies analysis under lowmagnification binocular microscope along with SEM - EDS analysis shows no trace of biogenicity at a microstructure level. New data shows that themicrofabric is formed by a combination of Ca-rich parallel and subparallel veins (spar), included in a Si-rich matrix with Fe content. Thesemicrostructures were previously identified as bryophyte remains but no feature other than morphological resemblance was found. This points to agenesis linked to a probable carbonate rich seep that caused Ca and Si mineralization in the form of complex dendrites. Further cathodoluminescenceanalysis can confirm the timing and different phases of mineralization and if there was incremental growth.1Fil: Benavente, Cecilia Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Mancuso, Adriana Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Crespo, Esteban María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; Argentina. Universidad Nacional de San Luis; ArgentinaReunión de Comunicaciones de la Asociación Paleontológica ArgentinaPuerto MadrynArgentinaAsociación Paleontológica ArgentinaAsociación Paleontológica Argentina2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/234928Bajo de Veliz stromatolites revisited; Reunión de Comunicaciones de la Asociación Paleontológica Argentina; Puerto Madryn; Argentina; 2018; 37-372469-0228CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.peapaleontologica.org.ar/index.php/peapa/article/view/296info:eu-repo/semantics/altIdentifier/doi/10.5710/PEAPA.15.04.2019.296Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:35:46Zoai:ri.conicet.gov.ar:11336/234928instacron: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:34982025-09-29 09:35:47.015CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Bajo de Veliz stromatolites revisited
title Bajo de Veliz stromatolites revisited
spellingShingle Bajo de Veliz stromatolites revisited
Benavente, Cecilia Andrea
Permian
Stromatolites
Ca-rich
title_short Bajo de Veliz stromatolites revisited
title_full Bajo de Veliz stromatolites revisited
title_fullStr Bajo de Veliz stromatolites revisited
title_full_unstemmed Bajo de Veliz stromatolites revisited
title_sort Bajo de Veliz stromatolites revisited
dc.creator.none.fl_str_mv Benavente, Cecilia Andrea
Mancuso, Adriana Cecilia
Crespo, Esteban María
author Benavente, Cecilia Andrea
author_facet Benavente, Cecilia Andrea
Mancuso, Adriana Cecilia
Crespo, Esteban María
author_role author
author2 Mancuso, Adriana Cecilia
Crespo, Esteban María
author2_role author
author
dc.subject.none.fl_str_mv Permian
Stromatolites
Ca-rich
topic Permian
Stromatolites
Ca-rich
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The discussion about the true biogenicity of Ca-rich deposits has been extensive, and in the past, abiogenic structures have been referred tostromatolites when their origin was linked to inorganic precipitation of carbonate. Later on, different types of carbonate precipitation have beendescribed including: mineralization (inorganic); and biogenic precipitation of carbonates, namely: biologically controlled, biologically induced andbiologically influenced mineralization. The Bajo de Véliz subbasin, located on the east margin of the Paganzo Basin, in the NE of San Luis province,presents the Bajo de Véliz Formation, referred to as Permian. The unit is a siliciclastic succession, well known by its extraordinary fossiliferouscontent and includes carbonate levels. The carbonates have been previously described as stromatolites based on microfacies analysis with theidentification of bryophyte and cyanobacteria as producers. Nevertheless, new polished sections and thin section microfacies analysis under lowmagnification binocular microscope along with SEM - EDS analysis shows no trace of biogenicity at a microstructure level. New data shows that themicrofabric is formed by a combination of Ca-rich parallel and subparallel veins (spar), included in a Si-rich matrix with Fe content. Thesemicrostructures were previously identified as bryophyte remains but no feature other than morphological resemblance was found. This points to agenesis linked to a probable carbonate rich seep that caused Ca and Si mineralization in the form of complex dendrites. Further cathodoluminescenceanalysis can confirm the timing and different phases of mineralization and if there was incremental growth.1
Fil: Benavente, Cecilia Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Mancuso, Adriana Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Crespo, Esteban María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; Argentina. Universidad Nacional de San Luis; Argentina
Reunión de Comunicaciones de la Asociación Paleontológica Argentina
Puerto Madryn
Argentina
Asociación Paleontológica Argentina
description The discussion about the true biogenicity of Ca-rich deposits has been extensive, and in the past, abiogenic structures have been referred tostromatolites when their origin was linked to inorganic precipitation of carbonate. Later on, different types of carbonate precipitation have beendescribed including: mineralization (inorganic); and biogenic precipitation of carbonates, namely: biologically controlled, biologically induced andbiologically influenced mineralization. The Bajo de Véliz subbasin, located on the east margin of the Paganzo Basin, in the NE of San Luis province,presents the Bajo de Véliz Formation, referred to as Permian. The unit is a siliciclastic succession, well known by its extraordinary fossiliferouscontent and includes carbonate levels. The carbonates have been previously described as stromatolites based on microfacies analysis with theidentification of bryophyte and cyanobacteria as producers. Nevertheless, new polished sections and thin section microfacies analysis under lowmagnification binocular microscope along with SEM - EDS analysis shows no trace of biogenicity at a microstructure level. New data shows that themicrofabric is formed by a combination of Ca-rich parallel and subparallel veins (spar), included in a Si-rich matrix with Fe content. Thesemicrostructures were previously identified as bryophyte remains but no feature other than morphological resemblance was found. This points to agenesis linked to a probable carbonate rich seep that caused Ca and Si mineralization in the form of complex dendrites. Further cathodoluminescenceanalysis can confirm the timing and different phases of mineralization and if there was incremental growth.1
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Reunión
Journal
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/234928
Bajo de Veliz stromatolites revisited; Reunión de Comunicaciones de la Asociación Paleontológica Argentina; Puerto Madryn; Argentina; 2018; 37-37
2469-0228
CONICET Digital
CONICET
url http://hdl.handle.net/11336/234928
identifier_str_mv Bajo de Veliz stromatolites revisited; Reunión de Comunicaciones de la Asociación Paleontológica Argentina; Puerto Madryn; Argentina; 2018; 37-37
2469-0228
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.peapaleontologica.org.ar/index.php/peapa/article/view/296
info:eu-repo/semantics/altIdentifier/doi/10.5710/PEAPA.15.04.2019.296
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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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
application/pdf
application/pdf
dc.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Asociación Paleontológica Argentina
publisher.none.fl_str_mv Asociación Paleontológica Argentina
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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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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