dc.creatorEymard, Inès
dc.creatorAlvarez, Maria del Pilar
dc.creatorBilmes, Andrés
dc.creatorVasconcelos, Crisogono
dc.creatorAriztegui, Daniel
dc.date.accessioned2021-07-08T18:58:33Z
dc.date.accessioned2022-10-14T22:32:05Z
dc.date.available2021-07-08T18:58:33Z
dc.date.available2022-10-14T22:32:05Z
dc.date.created2021-07-08T18:58:33Z
dc.date.issued2020-07-04
dc.identifierEymard, 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
dc.identifierhttp://hdl.handle.net/11336/135754
dc.identifier2075-163X
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4314366
dc.description.abstractGeneses 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.
dc.languageeng
dc.publisherMultidisciplinary Digital Publishing Institute
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2075-163X/10/7/605
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.3390/min10070605
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectORGANOMINERALIZATION
dc.subjectMICROBIALITE
dc.subjectMG-SI PHASE
dc.subjectFILAMENTS
dc.subjectCARBONATE
dc.subjectPATAGONIA
dc.titleTracking organomineralization processes from living microbial mats to fossil microbialites
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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