Mineral redox buffers and the stability of organic compounds under hydrothermal conditions

摘要

Organic compounds play an integral role in numerous geochemical process in subsurface environments. To evaluate factor sthat regulate the stability of ethane, ethene, propane, and propene in hydrothermal systems a series of experiments were conducted at 300 to 325 deg C and 350 bars. The experiments contained the mineral assemblages pyrite-pyrrhotite-magnetite, hematite-magnetite-pyrite, and hematite-magnetite to buffer fO_2, a_H2(aq) and aH2S(aq) at geologically reasonable values.