Heavy halogen impact on Raman water bands at high pressure: Implications for salinity estimations in fluid inclusions
The measurement of water by Raman spectroscopy (group of bands between 2800 and 3800 cm-1) can be used to know the content of halogen elements chlorine, bromine and iodine in aqueous fluids.
We combined experiments in diamond anvil cells with in situ measurements at pressures up to 1.4 GPa and at room temperature by Raman. We show that it is possible to use this method to calculate the salinity of fluid inclusions trapped in minerals such as quartz or olivine, or during experiments. This method can alternatively be used either to measure salinity or, knowing this salinity, to measure pressure.
T. Grützner, H. Bureau (2024) Heavy halogen impact on Raman water bands at high pressure: Implications for salinity estimations in fluid inclusions. Chemical Geology 654, 122065.