High-flux gaseous hydrogen emissions in a back-arc basin: Qianyuan vents

Data S1. Raman spectra of Qianyuan vents fluids and mixed gas hydrates collected in the gas collection tank.Movie S1. In situ detection of gas components at the Qianyuan vents using in situ Raman spectroscopy.Movie S2. Collection of gases from the Qianyuan vents using a gas collection tank and evaluation of the hydrogen flux at the Qianyuan vents based on this.Movie S3. In situ Raman spectra collection from gases in the gas collection tank by inserting the Raman spectroscopy probe, detecting the formation of mixed gas hydrates.