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. 2021 Dec 20;12:7341. doi: 10.1038/s41467-021-27589-7

Fig. 2. Summary of H2-generation potentials of various rock compositional groups.

Fig. 2

Median (circle), 25th–75th percentile (lower and upper Xs, respectively), and 5th–95th percentile (lower and upper ticks, respectively) of H2-generation potentials yielded by simulations of alteration at various water-to-rock ratios: a 0.2, b 1, c 10, d 100 for various 5 wt % ranges of MgO content (e.g., 30–35 wt%).