S2: Water Rock Interaction (Special Session)

[S2P-01] Kinetics of serpentinization constrained from olivine dissolution rate at hydrothermal conditions

*Ryosuke Oyanagi¹, tatsu kuwatani¹, katsuhiko suzuki¹ (1. JAMSTEC)

Keywords:olivine, kinetics, serpentinization, hydrothermal experiments

Serpentinization gives significant changes to both chemical and physical properties of the oceanic lithosphere. Several studies suggested that the rate-limiting process of serpentinization is the dissolution of olivine. However, the olivine dissolution rates at > 150°C have never been measured. In this study, dissolution rate of olivine was measured at 200-300 °C. Based on dependences of temperature on dissolution rate, the time scales on hydrothermal alteration of peridotite will be discussed.