Carbon and hydrogen isotopes of the wet gases produced by gamma-ray-induced polymerisation of methane: Insights into radiogenic mechanism and natural gas formation

摘要: Abstract The 60Co gamma ray radiolysis of methane was undertaken at room temperature and a low proportion conversion to observe initial polymerisation reactions in the formation C2─C5 saturated hydrocarbon gases. product follows Schulz-Flory distribution model for straight-chained C2+ alkane gases consistent with chain propagation by addition C1 intermediates. high relative concentration branched isomers suggests total is likely controlled involving mainly radical In particular, pentane show dominance sub-equal amounts iso-pentane neo-pentane. Carbon isotopes wet are all depleted 13C δ13C reactant C2