The liptinite macerals of rich hydrogen are not much,but there are indications that they have made a contribution to the hydrocarbon generation and expulsion of stronger reducible type of humic coal.

• 富氢的稳定组显微组分虽然含量不多,但有迹象表明,它们对较强还原型腐殖煤的生烃排烃做出了应有的贡献。