Microbial and diagenetic steps leading to the mineralisation of Great Salt Lake microbialites.
| hal.structure.identifier | Géoressources et environnement | |
| dc.contributor.author | PACE, Aurélie | |
| hal.structure.identifier | Géoressources et environnement | |
| dc.contributor.author | BOURILLOT, Raphaël | |
| hal.structure.identifier | Biogéosciences [UMR 6282] [BGS] | |
| dc.contributor.author | BOUTON, Anthony | |
| hal.structure.identifier | Biogéosciences [UMR 6282] [BGS] | |
| dc.contributor.author | VENNIN, Emmanuelle | |
| hal.structure.identifier | Géoressources et environnement | |
| dc.contributor.author | GALAUP, Serge | |
| hal.structure.identifier | Biogéosciences [UMR 6282] [BGS] | |
| dc.contributor.author | BUNDELEVA, Irina | |
| hal.structure.identifier | Hydrogéologie, argiles, sols et altérations - FRE3114 [HydrASA] | |
| dc.contributor.author | PATRIER MAS, Patricia | |
| hal.structure.identifier | Department of Geological Sciences [Stockholm University] | |
| dc.contributor.author | DUPRAZ, Christophe | |
| hal.structure.identifier | Biogéosciences [UMR 6282] [BGS] | |
| dc.contributor.author | THOMAZO, Christophe | |
| hal.structure.identifier | Domaines Océaniques [LDO] | |
| dc.contributor.author | SANSJOFRE, Pierre | |
| hal.structure.identifier | Atmosphere and Ocean Research Institute [Kashiwa-shi] [AORI] | |
| dc.contributor.author | YOKOYAMA, Yusuke | |
| hal.structure.identifier | Géoressources et environnement | |
| dc.contributor.author | FRANCESCHI, Michel | |
| dc.contributor.author | ANGUY, Yannick
IDREF: 129650307 | |
| hal.structure.identifier | Géoressources et environnement | |
| dc.contributor.author | PIGOT, Léa | |
| dc.contributor.author | VIRGONE, Aurélien | |
| hal.structure.identifier | Center for Integrative Geosciences | |
| dc.contributor.author | VISSCHER, Pieter T. | |
| dc.date.accessioned | 2021-05-14T09:50:53Z | |
| dc.date.available | 2021-05-14T09:50:53Z | |
| dc.date.issued | 2016 | |
| dc.identifier.issn | 2045-2322 | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/77332 | |
| dc.description.abstractEn | Microbialites are widespread in modern and fossil hypersaline environments, where they provide a unique sedimentary archive. Authigenic mineral precipitation in modern microbialites results from a complex interplay between microbial metabolisms, organic matrices and environmental parameters. Here, we combined mineralogical and microscopic analyses with measurements of metabolic activity in order to characterise the mineralisation of microbial mats forming microbialites in the Great Salt Lake (Utah, USA). Our results show that the mineralisation process takes place in three steps progressing along geochemical gradients produced through microbial activity. First, a poorly crystallized Mg-Si phase precipitates on alveolar extracellular organic matrix due to a rise of the pH in the zone of active oxygenic photosynthesis. Second, aragonite patches nucleate in close proximity to sulfate reduction hotspots, as a result of the degradation of cyanobacteria and extracellular organic matrix mediated by, among others, sulfate reducing bacteria. A final step consists of partial replacement of aragonite by dolomite, possibly in neutral to slightly acidic porewater. This might occur due to dissolution-precipitation reactions when the most recalcitrant part of the organic matrix is degraded. The mineralisation pathways proposed here provide pivotal insight for the interpretation of microbial processes in past hypersaline environments. | |
| dc.language.iso | en | |
| dc.publisher | Nature Publishing Group | |
| dc.title.en | Microbial and diagenetic steps leading to the mineralisation of Great Salt Lake microbialites. | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1038/srep31495 | |
| dc.subject.hal | Planète et Univers [physics]/Sciences de la Terre/Géochimie | |
| bordeaux.journal | Scientific Reports | |
| bordeaux.page | 31495 | |
| bordeaux.volume | 6 | |
| bordeaux.hal.laboratories | Institut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295 | * |
| bordeaux.institution | Université de Bordeaux | |
| bordeaux.institution | Bordeaux INP | |
| bordeaux.institution | CNRS | |
| bordeaux.institution | INRAE | |
| bordeaux.institution | Arts et Métiers | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01356353 | |
| hal.version | 1 | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01356353v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Scientific%20Reports&rft.date=2016&rft.volume=6&rft.spage=31495&rft.epage=31495&rft.eissn=2045-2322&rft.issn=2045-2322&rft.au=PACE,%20Aur%C3%A9lie&BOURILLOT,%20Rapha%C3%ABl&BOUTON,%20Anthony&VENNIN,%20Emmanuelle&GALAUP,%20Serge&rft.genre=article |
Fichier(s) constituant ce document
| Fichiers | Taille | Format | Vue |
|---|---|---|---|
|
Il n'y a pas de fichiers associés à ce document. |
|||