摘要
根据碳同位素在自然界的分布、碳同位素的深度效应及测向运移的同位素分馏作用、碳同位素与母质类型和成熟度的关系、热模拟实验中的联同位素变化、有机质中碳同位素的逆转现象、费-托合成反应中的碳同位素分馏、大量幔源岩石中联同位素富12C特征的发现等，指出了造成碳同仁素分馏作用的因素太多，因而把碳同位素作为油气物源的示踪剂存在诸多的不确定性，在应用时宜与氧同位素资料结合考虑并注意碳同位素的储库效应，才可望正确判别油气的物质来源。
This paper discusses the distribution of carbon isotopes in the earth, carbon isotopic fractionation in the process of migration, the relation between organic matter types, maturation and carbon isotopes, carbon isotopic changes during thermal simulation at different temperatures, reversed distribution of carbon isotopes in sedimentary organic matter, carbon isotopic fractionation in the FischerTropsch synthesis and in meteorites, the discovery of lighter carbon isotopes in mantle-derived rocks,and so on. It is suggested that the effects of carbon isotopic fractionation on carbon isotopic composition are so diverse that carbon isotopes could not be regarded as a reliable tracer for distinguishing biogenic from abiogenic oil and gas.
出处
《地质地球化学》
CSCD
北大核心
1998年第2期63-71,共9页
Geology-Geochemistry
