Data for: Abiotic methane generation via CO2 hydrogenation with natural chromitite under hydrothermal conditions

Dataset of hydrothermal experiments simulating oceanic hydrothermal systems. Table 1: Experimental condision of previous works that include little Cr spinel as a starting material. Table 2: Experimental condision of previous works that include Cr spinel as a starting material. Table 3: Composition of minerals (wt. %) in stating material and run pruducts in both experiments determined with FE-EPMA. Table 4: Composition of the sampled fluids in the experiments at 300 °C, and 500 bars. Table S1: Composition of minerals (wt%) determined with SEM-EDS. Table S2: Composition of minerals (wt%) determined with SEM-EDS. Table S3: Composition of minerals (wt%) determined with SEM-EDS. Table S4: Composition of minerals (wt%) determined with SEM-EDS. Table S5: Ru content