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1前言近几年来国内外有一些学者应用金属同位素体系研究石油烃类演化以及勘探方面的问题，如油源对比、石油定年等。例如，Pamelletal.[1]利用Pb-Pb定年方法研究了北威尔士TyGwyn铜矿中含铀固体沥青的形成年龄，并以此确定烃类运移到矿脉层的时间；Manningetal．[2]研究了一些?
1 Introduction In recent years, some scholars at home and abroad have applied metal isotope system to study petroleum hydrocarbon evolution and exploration issues such as oil source contrast and oil dating. For example, Pamelletal [1] used Pb-Pb dating to study the age of formation of uranium-bearing solid bitumen in the TyGwyn copper mine in North Wales and to determine the timing of hydrocarbon migration into the veins. [2] studied some?