Heavy halogen impact on Raman water bands at high pressure: implications for salinity estimations in fluid inclusions

  • We present a new experimental dataset on the impact of the heavy halogens chlorine, bromine and iodine on the Raman water bands concerning pressure and their concentration at room temperature. These experiments were conducted at ambient temperature, with variations in halogen concentration and pressure ranging from 0 to 1.4 GPa. The strength of the Raman water band shift change increases with the ionic size from chlorine, over bromine, to iodine. Our experiments further demonstrate that increased pressure diminishes the impact of the halogen shift change to a varying extent for each of the three halogens. This finding can have significant implications for the salinity calculation of fluid inclusions in minerals such as quartz or olivine. Particularly in the low salinity range, the concentration can be markedly underestimated if the pressure effect is neglected. For experiments in diamond anvil cells involving halogens dissolved in water, the change in Raman water band shifts can serve either as a new tool to monitor pressure, or to monitor the salinity.

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Author:Tobias GrütznerORCiDGND, Hélène BureauORCiD
URN:urn:nbn:de:hebis:30:3-835235
DOI:https://doi.org/10.1016/j.chemgeo.2024.122065
ISSN:0009-2541
Parent Title (English):Chemical Geology
Publisher:Elsevier
Place of publication:Amsterdam
Document Type:Article
Language:English
Date of Publication (online):2024/03/29
Date of first Publication:2024/03/26
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2024/04/09
Tag:Fluid inclusion; Halogens; High pressure; Raman; Salinity; Water bands
Volume:654
Issue:122065
Article Number:122065
Page Number:9
HeBIS-PPN:517873834
Institutes:Geowissenschaften / Geographie / Geowissenschaften
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International