Fig. 5

Photomicrographs and representative Raman spectra of fluid inclusions in carbonate minerals. a PPL image of fluid inclusions in dolomite. b Raman spectrum of fluid inclusion in dolomite. Raman spectra of most fluid inclusions in calcite and dolomite show a broad band from around 2700–3800 cm⁻¹, which originates from O–H stretching modes of liquid water. c Enlarged view of O–H stretching region in the Raman spectrum of (b). PPL image (d) and Raman spectrum (e) of dolomite-hosted fluid inclusions that propagate from the serpentinized rim of olivine crystal