Hopane hydrocarbons contained in organic matter from the Lower Cambrian Sinyaya Formation, southeast of the Siberian platform, were analyzed by gas chromatography/mass spectrometry. This study first identified C28 28, 30-bisnorhopane and its homologues present in high concentrations in autochthonous organic matter from East Siberian sedimentary basins. These biomarkers can be used in distinguishing between the sources of naphthides on the northern slope of the Aldan anteclise. Two saturated naphthenic hydrocarbons, C31 homohopene and C31 28-norhomohopene, were also detected. This study provides some details on hopane distribution, organic matter accumulation conditions, and the degree of OM catagenesis.
