『（Abstract）
We present in situ observations of hydrocarbon formation
via carbonate reduction at upper mantle pressures and temperatures.
Methane was formed from FeO, CaCO3-calcite,
and water at pressures between 5 and 11 GPa and temperatures ranging
from 500℃ to 1,500℃. The results are shown to be consistent with
multiphase thermodynamic calculations based on the statistical
mechanics of soft particle mixtures. The study demonstrates the
existence of abiogenic pathways for the formation of hydrocarbons
in the Earth's interior and suggests that the hydrocarbon budget
of the bulk Earth may be larger than conventionally assumed.』
（Introduction）
Methods
Results
Discussion
（Acknowledgments）
（References）