Fig. 6
From: Methane genesis within olivine-hosted fluid inclusions in dolomitic marble of the Hida Belt, Japan
Schematic diagram illustrating a model of serpentinization and accompanying CH4 generation within olivine-hosted fluid inclusions. a Petrography of olivine-bearing dolomitic marble. b Olivine-hosted fluid inclusions originally contained H2O and CO2 (COH fluid) when they were trapped. c The decrease in temperature during the early stages of exhumation causes serpentinization of host olivine by trapped fluid and H2 generation. d Generated H2 reduced CO2 and formed CH4