Numerical investigation of the effect of volatilization and the supercritical state of pore water on maturation of organic matter in the vicinity of igneous intrusions

► The temperature dependence of thermal properties of pore water can be ignored. ► Volatilization of pore water can reduce the predicted Rr significantly. ► Hydrothermal convection in host rocks can not result in the present Rr profile. ► Finite-time intrusion and pore-water volatilization represent natural conditions.