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应用地球化学资料识别层序地层单元的方法包括:碳氧同位素法、黏土矿物法、胶结物含量法、微量元素法、稀土元素法、TOC识别法、镜质体反射率法等。上述方法识别层序地层单元具有识别准确和分辨率高等优点,缺点是容易受到样品采样不连续的限制和受成岩作用、岩浆作用、构造作用等其他因素的影响。因此,在多地球化学指标结合识别层序地层单元的基础上,还应结合测井、地震、古生物等资料开展层序地层单元综合识别。
Methods of identifying sequence stratigraphic units using geochemical data include: carbon and oxygen isotope method, clay mineral method, cement content method, trace element method, rare earth element method, TOC recognition method, vitrinite reflectance method and the like. The above method has the advantages of accurate recognition and high resolution. The disadvantage of this method is that it is easily limited by sample discontinuity and other factors such as diagenesis, magmatism and tectonism. Therefore, on the basis of multi-geochemical indicators combined with the identification of sequence stratigraphic units, comprehensive identification of sequence stratigraphic units should be carried out based on well logging, seismic and paleontological data.