The yields and carbon isotopic composition of gaseous hydrocarbons and the yields of pyrobitumen were determined.
原油和沥青质裂解气各组分及焦沥青的产率变化类似；
The organic elementary compositions of the bitumen are characterized by poor hydrogen and rich oxygen and sulfur, suggesting that it is of pyrobitumen as a result of high maturity and TSR.
其有机元素组成以贫氢、富氧、富硫为特征，属高热演化且受硫酸盐热化学还原作用影响的焦沥青类。
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