Palaeohydrology of the Mulhouse Basin: are fluid inclusions in halite tracers of past seawater composition?

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dc.contributor.authorCendón, DIen_AU
dc.contributor.authorAyora, Cen_AU
dc.contributor.authorPueyo, JJen_AU
dc.contributor.authorTaberner, Cen_AU
dc.contributor.authorBlanc-Valleron, MMen_AU
dc.date.accessioned2022-01-20T06:03:27Zen_AU
dc.date.available2022-01-20T06:03:27Zen_AU
dc.date.issued2007-08-19en_AU
dc.date.statistics2021-12-24en_AU
dc.description.abstractBrine reactions processes were the most important factors controlling the major-ion evolution in the Oligocene, Mulhouse Basin (France) evaporite basin. The combined analysis of fluid inclusions in primary textures in halite by Cryo-SEM-EDS with sulfate-δ34S, δ18O and 87Sr/86Sr isotope ratios reveals hydrothermal inputs and recycling of Permian evaporites, particularly during advanced stages of evaporation in the Salt IV member which ended with sylvite formation. The lower part of the Salt IV evolved from an originally marine input. Sulfate-δ34S shows Oligocene marine-like signatures at the base of the member (Fig.1). However, enriched sulfate-δ18O reveals the importance of re-oxidation processes. As evaporation progressed other non-marine or marine-modified inputs from neighbouring basins became more important. This is demonstrated by an increase in K concentrations in brine inclusions, Br in halite and variations in sulfate isotopes trends and 87Sr/86Sr ratios. The recycling of previously precipitated evaporites was increasingly important with evaporation. Therefore, regardless of the apparent marine sequence (gypsum, halite, potassic salts), the existence of diverse inputs and the consequent chemical changes to the brine preclude the use of trapped brine inclusions in direct reconstruction of Oligocene seawater chemistry.en_AU
dc.identifier.citationCendón, D. I., Ayora, C., Pueyo, J. J., Taberner, C., & Blanc-Valleron, M. M. (2007). Palaeohydrology of the Mulhouse Basin: are fluid inclusions in halite tracers of past seawater composition? 17th Annual V.M. Goldschmidt Conference (Goldschmidt 2007) - "Atoms to Planets", Cologne, Germany: University of Cologne,19th - 24th August 2007, (p.A153). Retrieved from: https://goldschmidtabstracts.info/abstracts/abstractView?id=2007005454en_AU
dc.identifier.conferenceenddate24 August 2007en_AU
dc.identifier.conferencename17th Annual V.M. Goldschmidt Conference (Goldschmidt 2007) - 'Atoms to Planets', 19th - 24th August 2007en_AU
dc.identifier.conferenceplaceCologne, Germanyen_AU
dc.identifier.conferencestartdate19 August 2007en_AU
dc.identifier.issueS15en_AU
dc.identifier.journaltitleGeochimica et Cosmochimica Actaen_AU
dc.identifier.paginationA153en_AU
dc.identifier.urihttps://goldschmidtabstracts.info/abstracts/abstractView?id=2007005454en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12705en_AU
dc.identifier.volume71en_AU
dc.language.isoenen_AU
dc.publisherGoldschmidten_AU
dc.subjectBrinesen_AU
dc.subjectFranceen_AU
dc.subjectSulfatesen_AU
dc.subjectEvaporationen_AU
dc.subjectGypsumen_AU
dc.subjectIsotopesen_AU
dc.subjectSaltsen_AU
dc.subjectWater chemistryen_AU
dc.titlePalaeohydrology of the Mulhouse Basin: are fluid inclusions in halite tracers of past seawater composition?en_AU
dc.typeConference Abstracten_AU
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