Fig. 16

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H2-CH4-N2 ternary diagram showing H2-rich gas samples collected from ophiolites and continental crust (Coveney et al., 1987; Etiope et al., 2017; Guélard et al., 2017; Lévy et al., 2023; Nivin 2019; Potter et al., 2013; Randazzo et al., 2021; Salvi and Williams-Jones, 1997; Sherwood Lollar et al., 2006; Vacquand et al., 2018).
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