The amorphous organic matter (AOM) facies formed under anoxic water, with high TOC (Total Organic Carbon) and HI (Hydrogen Index) values, were developed in the Wenchang Formation of the majority of the basin area.

• 形成于缺氧水体下的无定形有机相在盆地大部分地区均有发育,其TOC值和l_H值较高;