Tracking organomineralization processes from living microbial mats to fossil microbialites

Autores
Eymard, Inès; Alvarez, Maria del Pilar; Bilmes, Andrés; Vasconcelos, Crisogono; Ariztegui, Daniel
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Geneses of microbialites and, more precisely, lithification of microbial mats have been studiedin dierent settings to improve the recognition of biogenicity in the fossil record. Living microbial matsand fossil microbialites associated with older paleoshorelines have been studied in the continentalMaquinchao Basin in southernmost South America. Here, we investigate carbonate crusts from aformer pond where active mineralizing microbial mats have been previously studied. Petrographicobservations revealed the presence of abundant erect and nonerect microfilaments and molds withdiameters varying from 6 to 8 micrometers. Additionally, smaller pores and organic matter (OM)remains have been identified in areas containing less filaments and being dominated by carbonate.A Mg, Al and Si-rich phase has also been identified in the carbonate matrix associated with thedominant micritic calcite. Moreover, mineralized sheaths contain mixed carbonate (calcite) withMg, Al and Si, where the latter elements are associated with authigenic clays. The presence ofmineralized sheaths further attests to biologically induced processes during the uptake of CO2 byphotosynthetic microorganisms. Additionally, the high density of the micritic phase supports thesubsequent mineralization by nonphotosynthetic microorganisms and/or physicochemical processes,such as evaporation. Since the micritic filament microstructure of these recent crusts is very similarto that observed in fossil microbialites, they can be used to bridge the gap between living mats andfossil buildups.
Fil: Eymard, Inès. Universidad de Ginebra. Facultad de Ciencias. Sección de Ciencias de la Tierra; Suiza
Fil: Alvarez, Maria del Pilar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico para el Estudio de los Ecosistemas Continentales; Argentina
Fil: Bilmes, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico de Geología y Paleontología; Argentina
Fil: Vasconcelos, Crisogono. Centro de Desenvolvimento Tecnológico; Brasil
Fil: Ariztegui, Daniel. Universidad de Ginebra. Facultad de Ciencias. Sección de Ciencias de la Tierra; Suiza
Materia
ORGANOMINERALIZATION
MICROBIALITE
MG-SI PHASE
FILAMENTS
CARBONATE
PATAGONIA
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/135754
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Tracking organomineralization processes from living microbial mats to fossil microbialitesEymard, InèsAlvarez, Maria del PilarBilmes, AndrésVasconcelos, CrisogonoAriztegui, DanielORGANOMINERALIZATIONMICROBIALITEMG-SI PHASEFILAMENTSCARBONATEPATAGONIAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Geneses of microbialites and, more precisely, lithification of microbial mats have been studiedin dierent settings to improve the recognition of biogenicity in the fossil record. Living microbial matsand fossil microbialites associated with older paleoshorelines have been studied in the continentalMaquinchao Basin in southernmost South America. Here, we investigate carbonate crusts from aformer pond where active mineralizing microbial mats have been previously studied. Petrographicobservations revealed the presence of abundant erect and nonerect microfilaments and molds withdiameters varying from 6 to 8 micrometers. Additionally, smaller pores and organic matter (OM)remains have been identified in areas containing less filaments and being dominated by carbonate.A Mg, Al and Si-rich phase has also been identified in the carbonate matrix associated with thedominant micritic calcite. Moreover, mineralized sheaths contain mixed carbonate (calcite) withMg, Al and Si, where the latter elements are associated with authigenic clays. The presence ofmineralized sheaths further attests to biologically induced processes during the uptake of CO2 byphotosynthetic microorganisms. Additionally, the high density of the micritic phase supports thesubsequent mineralization by nonphotosynthetic microorganisms and/or physicochemical processes,such as evaporation. Since the micritic filament microstructure of these recent crusts is very similarto that observed in fossil microbialites, they can be used to bridge the gap between living mats andfossil buildups.Fil: Eymard, Inès. Universidad de Ginebra. Facultad de Ciencias. Sección de Ciencias de la Tierra; SuizaFil: Alvarez, Maria del Pilar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico para el Estudio de los Ecosistemas Continentales; ArgentinaFil: Bilmes, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico de Geología y Paleontología; ArgentinaFil: Vasconcelos, Crisogono. Centro de Desenvolvimento Tecnológico; BrasilFil: Ariztegui, Daniel. Universidad de Ginebra. Facultad de Ciencias. Sección de Ciencias de la Tierra; SuizaMultidisciplinary Digital Publishing Institute2020-07-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/135754Eymard, Inès; Alvarez, Maria del Pilar; Bilmes, Andrés; Vasconcelos, Crisogono; Ariztegui, Daniel; Tracking organomineralization processes from living microbial mats to fossil microbialites; Multidisciplinary Digital Publishing Institute; Minerals; 10; 7; 4-7-2020; 1-202075-163XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2075-163X/10/7/605info:eu-repo/semantics/altIdentifier/doi/10.3390/min10070605info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:35:08Zoai:ri.conicet.gov.ar:11336/135754instacron: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 09:35:09.077CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Tracking organomineralization processes from living microbial mats to fossil microbialites
title Tracking organomineralization processes from living microbial mats to fossil microbialites
spellingShingle Tracking organomineralization processes from living microbial mats to fossil microbialites
Eymard, Inès
ORGANOMINERALIZATION
MICROBIALITE
MG-SI PHASE
FILAMENTS
CARBONATE
PATAGONIA
title_short Tracking organomineralization processes from living microbial mats to fossil microbialites
title_full Tracking organomineralization processes from living microbial mats to fossil microbialites
title_fullStr Tracking organomineralization processes from living microbial mats to fossil microbialites
title_full_unstemmed Tracking organomineralization processes from living microbial mats to fossil microbialites
title_sort Tracking organomineralization processes from living microbial mats to fossil microbialites
dc.creator.none.fl_str_mv Eymard, Inès
Alvarez, Maria del Pilar
Bilmes, Andrés
Vasconcelos, Crisogono
Ariztegui, Daniel
author Eymard, Inès
author_facet Eymard, Inès
Alvarez, Maria del Pilar
Bilmes, Andrés
Vasconcelos, Crisogono
Ariztegui, Daniel
author_role author
author2 Alvarez, Maria del Pilar
Bilmes, Andrés
Vasconcelos, Crisogono
Ariztegui, Daniel
author2_role author
author
author
author
dc.subject.none.fl_str_mv ORGANOMINERALIZATION
MICROBIALITE
MG-SI PHASE
FILAMENTS
CARBONATE
PATAGONIA
topic ORGANOMINERALIZATION
MICROBIALITE
MG-SI PHASE
FILAMENTS
CARBONATE
PATAGONIA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Geneses of microbialites and, more precisely, lithification of microbial mats have been studiedin dierent settings to improve the recognition of biogenicity in the fossil record. Living microbial matsand fossil microbialites associated with older paleoshorelines have been studied in the continentalMaquinchao Basin in southernmost South America. Here, we investigate carbonate crusts from aformer pond where active mineralizing microbial mats have been previously studied. Petrographicobservations revealed the presence of abundant erect and nonerect microfilaments and molds withdiameters varying from 6 to 8 micrometers. Additionally, smaller pores and organic matter (OM)remains have been identified in areas containing less filaments and being dominated by carbonate.A Mg, Al and Si-rich phase has also been identified in the carbonate matrix associated with thedominant micritic calcite. Moreover, mineralized sheaths contain mixed carbonate (calcite) withMg, Al and Si, where the latter elements are associated with authigenic clays. The presence ofmineralized sheaths further attests to biologically induced processes during the uptake of CO2 byphotosynthetic microorganisms. Additionally, the high density of the micritic phase supports thesubsequent mineralization by nonphotosynthetic microorganisms and/or physicochemical processes,such as evaporation. Since the micritic filament microstructure of these recent crusts is very similarto that observed in fossil microbialites, they can be used to bridge the gap between living mats andfossil buildups.
Fil: Eymard, Inès. Universidad de Ginebra. Facultad de Ciencias. Sección de Ciencias de la Tierra; Suiza
Fil: Alvarez, Maria del Pilar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico para el Estudio de los Ecosistemas Continentales; Argentina
Fil: Bilmes, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico de Geología y Paleontología; Argentina
Fil: Vasconcelos, Crisogono. Centro de Desenvolvimento Tecnológico; Brasil
Fil: Ariztegui, Daniel. Universidad de Ginebra. Facultad de Ciencias. Sección de Ciencias de la Tierra; Suiza
description Geneses of microbialites and, more precisely, lithification of microbial mats have been studiedin dierent settings to improve the recognition of biogenicity in the fossil record. Living microbial matsand fossil microbialites associated with older paleoshorelines have been studied in the continentalMaquinchao Basin in southernmost South America. Here, we investigate carbonate crusts from aformer pond where active mineralizing microbial mats have been previously studied. Petrographicobservations revealed the presence of abundant erect and nonerect microfilaments and molds withdiameters varying from 6 to 8 micrometers. Additionally, smaller pores and organic matter (OM)remains have been identified in areas containing less filaments and being dominated by carbonate.A Mg, Al and Si-rich phase has also been identified in the carbonate matrix associated with thedominant micritic calcite. Moreover, mineralized sheaths contain mixed carbonate (calcite) withMg, Al and Si, where the latter elements are associated with authigenic clays. The presence ofmineralized sheaths further attests to biologically induced processes during the uptake of CO2 byphotosynthetic microorganisms. Additionally, the high density of the micritic phase supports thesubsequent mineralization by nonphotosynthetic microorganisms and/or physicochemical processes,such as evaporation. Since the micritic filament microstructure of these recent crusts is very similarto that observed in fossil microbialites, they can be used to bridge the gap between living mats andfossil buildups.
publishDate 2020
dc.date.none.fl_str_mv 2020-07-04
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/11336/135754
Eymard, Inès; Alvarez, Maria del Pilar; Bilmes, Andrés; Vasconcelos, Crisogono; Ariztegui, Daniel; Tracking organomineralization processes from living microbial mats to fossil microbialites; Multidisciplinary Digital Publishing Institute; Minerals; 10; 7; 4-7-2020; 1-20
2075-163X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/135754
identifier_str_mv Eymard, Inès; Alvarez, Maria del Pilar; Bilmes, Andrés; Vasconcelos, Crisogono; Ariztegui, Daniel; Tracking organomineralization processes from living microbial mats to fossil microbialites; Multidisciplinary Digital Publishing Institute; Minerals; 10; 7; 4-7-2020; 1-20
2075-163X
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.mdpi.com/2075-163X/10/7/605
info:eu-repo/semantics/altIdentifier/doi/10.3390/min10070605
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
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 13.070432

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