29. maí - Enikö Bali (Professor, Faculty of Earth Sciences, University of Iceland)
Titill: Application of quantitative Raman Spectroscopy in several geological problems
Tími: 12:30Staður: Askja, Fundarherbergi á 3ju hæð (herb. 367) og streymt á Zoom:
Listi yfir föstudagserindi Jarðvísindastofnunar og Norræna eldfjallasetursins.
Útdráttur:
The Institute of Earth Sciences in collaboration with the Innovation Centre of Iceland (now IceTech) and University of Reykjavík obtained a High-Resolution Raman Spectrometer equipped by an optical microscope in 2018 as a result of a Rannís Infrastructure Grant. Since its installation the machine was scarcely used by Geoscientists, probably because the local community is not properly informed about the capability of this instrument.
In this talk I try to fill this gap as much as possible in a half an hour long lecture. I will introduce several quantitative analytical methods which might be of interest in broader fields of volcanology, geochemistry and geothermal research. Much of the work I will talk about was developed for our specific spectrometer by my BSc, MSc and PhD students. These include precise calibration of CO2 density in mineral and glass hosted fluid inclusions, fluid salinity measurements in small mineral hosted fluid inclusions, and precise determination of H2O contents in basaltic glasses. I will explain very briefly how the analyses are done and what are the advantages and disadvantages to use Raman Spectroscopy compared to other methods. I will also highlight some recent results (both published and unpublished as a result of this work) as well as possibilities where I think Raman Spectroscopy could be applied by the larger geoscience community, not just by me and my students. Hopefully by the end of this talk I will spark some interest, and the instrument will be more widely used in the future.
Öll velkomin!