Fig. 4From: Hydrogen-rich hydrothermal environments in the Hadean ocean inferred from serpentinization of komatiites at 300 °C and 500 barResults of the Curie temperature measurements. a Strong-field thermomagnetic curve for the alteration product of the olivine experiment. b Temperature dependency of saturation magnetization of the starting material and alteration product from the Al2O3-5 % and Al2O3-10 % komatiite experiments, which were calculated from their hysteresis loops measured at various temperatures (e.g., Fig. 3)Back to article page