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Progress in Earth and Planetary Science
Fig. 2 | Progress in Earth and Planetary Science

Fig. 2

From: Hydrogen-rich hydrothermal environments in the Hadean ocean inferred from serpentinization of komatiites at 300 °C and 500 bar

Fig. 2

Results of the XRD analysis (CuKα) of the alteration products. XRD pattern of the alteration products from the experiments with (a) olivine, (b) Al2O3-5 % komatiite, and (c) Al2O3-10 % komatiite. Mineral abbreviations and ideal chemical formula: Ol = olivine ((Mg, Fe)2SiO4), Sme = smectite ((Na, Ca)0.3(Al, Fe, Mg)2–3(Si, Al)4O10(OH)2 · nH2O), Srp = serpentine ((Mg, Fe)3Si2O5(OH)4), Brc = brucite ((Mg, Fe)(OH)2), and Xon = xonotlite (Ca6Si6O17(OH)2)

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