3D Raman mapping combined with FIB‐SEM on multiphase fluid inclusions: A tool to unravel complex phase assemblages

In this study, we performed high resolution 3D Raman mapping on primary multiphase fluid inclusions from a granulite and an eclogite of the Cabo Ortegal Complex (NW Spain), latter representing former subduction zone environment. Several microns-sized are great targets to test advantages limitations mapping. We show how optical scattering properties phases inside can affect veracity both 2D maps. As independent control, models were compared with focused ion beam-scanning electron microscopy submicron-scale slicing three previously mapped inclusions, allowing us optimize spectroscopy data evaluation provide volume proportion calculations. found that non-optimized procedure might result in even order magnitude over- or underestimation phase properties. propose correcting maps empirically determined cross sections vastly improve quality The results valuable input for thermodynamic modeling draw implications fluid/rock interactions.