Oxygen and hydrogen isotope analysis of experimentally generated magmatic and metamorphic aqueous fluids using laser spectroscopy (WS-CRDS)

We report a new procedure for the analysis of oxygen and hydrogen isotopes in water that is experimentally produced high-temperature high-pressure experiments via wavelength-scanned cavity ring down spectroscopy (WS-CRDS). This work builds on recently developed method by Affolter et al. (2014) fluid inclusions cave carbonate deposits. show simple modification setup allows extraction fluids from their noble metal capsules an online line, analyse them without further treatment molecule prior to isotope determination. tested this standard reference samples generated during thermal decomposition hydrous minerals hydrothermally altered rocks. Preliminary results indicate released rocks at conditions 640 °C 100 MPa maintain isotopic compositions close those meteoric involved alteration. Further development application will offer great insights into origin evolution magmatic metamorphic systems, be valuable tool determination derived fluid-melt fluid-mineral fractionation.