BIOMARKER ASSEMBLAGE OF BOGHEAD IN SHUICHENG, WESTERN GUIZHOU

The aliphatic fraction of Shuicheng boghead is characterized by the mi xed source inputs of microbes and higher plants. The products of micro bial source inputs, i.e. C-21(-) n-alkanes, tricyclic terpanes, steran es, single-methyl branched alkanes, isoprenoid alkanes except phytane series, drimane series, tetracyclic terpanes and hopane type of triter panes, amount to 52.4% of the aliphatic fraction, while hydrocarbons o f higher plant source input, including C-22(+) alkanes and some sesqui terpenoids, account for 32.2%. In addition, the phytane series of phot oautotrophic chlorophyll source input just make up 7.0% of the fractio n.