GEOCHEMICAL CHARACTERISTICS OF THE JURASSIC HYDROCARBON SOURCE ROCKS IN THE BAIGEZHUANG UPLIFT

The hydrocarbons in the chloroform extract of Jurassic source rocks(mudstone,coal)in the Baigezhuang Uplift of East Hebei province have been analysed systematically by means of organic geochem ical measurements.It is revealed that the source rocks have the geochemical characteristics of coal-measure strata and belong to mature hydrocarbon source rocks.An unusual compound series-alkyl benzene dis covered in the fraction of saturated hydrocarbons is probably from microbial and algal origin.