Spatially resolved CO₂ carbon stable isotope analyses at the microscale using Raman spectroscopy.

ABSTRACT: Measuring the carbon stable isotope ratio (¹³C/¹²C, expressed as δ¹³C_CO2) in geogenic CO₂ fluids is a crucial geochemical tool for studying Earth's degassing. Carbon stable isotope analysis is traditionally performed by bulk mass spectrometry. Although Raman spectroscopy distinguishes ¹²CO₂ and ¹³CO₂ isotopologue bands in spectra, using this technique to determine CO₂ isotopic signature has been challenging. Here, we report on in-situ non-destructive analyses of the C stable isotopic composition of CO₂, applying a novel high-resolution Raman configuration on 42 high-density CO₂ fluid inclusions in mantle rocks from the Lake Tana region (Ethiopia) and El Hierro

SUBMITTER: Remigi S 

PROVIDER: S-EPMC10613625 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature