化学地层学,又可称为化学元素地层学,是用含油气盆地中岩石矿物的常量、微量、痕量元素的组合及变化来描述地层的特征,并划分和对比地层的。最新的研究表明,尽管沉积岩的地球化学特征变化很大,在组分上捉摸不定,但是对均匀单一岩性沉积岩中重矿物和粘土矿物的微量、痕量元素的分析表明,它们在含量变化、元素组合上仍然有很大差别。这种差别为化学地层学的产生和发展奠定了基础。岩石矿物的微、痕量元素资料可用感应耦合等离子原子吸收光谱仪(ICP—AES)和感应耦合等离子质 Chemical stratigraphy, also known as chemical element stratigraphy, is the description of stratigraphic features by the combination and variation of constants, trace elements and trace elements of rock minerals in petroliferous basins, and the division and contrast of stratigraphy. Recent studies show that trace elements of heavy minerals and clay minerals in homogeneous single lithologic sedimentary rocks show that although the geochemical characteristics of sedimentary rocks vary greatly and are uncertain in composition, There is still a big difference between elemental combinations. This difference laid the foundation for the formation and development of chemical stratigraphy. The micro and trace element information of rock minerals can be determined by inductively coupled plasma atomic absorption spectrometry (ICP-AES) and inductively coupled plasma