层序的成因及层序地层格架

THE CAUSE OF SEQUENCE AND SEQUENCE STRATIGRAPHIC FRAMEWORK

层序的成因是沉积基准面变化所引起的 ,沉积基准面是全球性海平面变化、构造升降、沉积物供应和气候四个因素耦合作用导致的。通过对同位素测年、生物地层对比、层序成因、层序地层对比及层序界面性质五个方面的讨论 ,指出层序地层格架不是一个等时地层格架 ,不能作为全球对比的标准 ,它所体现的主要是沉积作用和沉积地层在三维空间的展布规律。

The cause of sequence formation should be contacted with sedimentary basic-level change, which is result of global sea-level change, tectonic uplift and subside, sediment supply and climate synthetical action. Based on discussing about isotape age, biostratigraphic correlation, cause of sequence formation, sequence stratigraphic correlation and sequence boundary, sequence stratigraphic framework can not be regarded as isochronous, so it can not be regarded as the standard of global correlation, it reflects the spreading rule of sedimental action and sedimental strata in three-dimensional space.