摘要
地层记录具四大特性 :“复杂性、非渐变性、不完整性、旋回性”。旋回性地层记录的研究 ,即“不同级别旋回层序及其有序叠加形式”的研究是从复杂而不完整的地层记录中寻找更多的规律性的有效途径之一。异成因旋回层序的两大特征——“空间上相序的有序性及时间上环境变化的同步性”,说明了地层记录中的两种相变面——“静态相变面及动态相变面”以及与之相关的两种穿时性——“相变面穿时及间断面穿时”的普遍性 ,这是地层记录的复杂性的又一重要体现。两种相变面及两种穿时性 ,是地层堆积作用过程中沉积环境的空间相变及时间相变共同作用的结果 ,它们是正确建立时代—岩石格架 。
The four particularities of the stratigraphical records—complexity, non gradual change, non integrity and cyclicity—show that the study of cyclicity is the key for getting more regularity from complex and non integrated stratigraphical records. Two natures of cyclic sequence—the regularity of lithofacies succession in space and the simultanity of environmental change in time—indicate that there are two kinds of facies change surfaces that are dynamic facies change surface and static one, so two kinds of diachrononism—the diachrononism of facies change and the diachrononism of punctuate surface in stratigraphical records—are formed. Two kinds of diachrononism are genetically related to two kinds of facies change surface, facies change diachrononism is genetically related to the static facies change surface, and the diachrononism of punctuated surface is genetically related to the dynamic facies change surface. Two kinds of facies change surface and two kinds of diachrononism in stratigraphical record reflect the complexity of stratigraphical records. The study and discernment of two kinds of facies change surface and two kinds of diachrononism are key for constructing the stratigraphical framwork of time lithounits, and are very important in the study of the systematic change patterns of sediments as well as the influence of various sedimentational processes and the effects of the events on rock formation.
出处
《地层学杂志》
CSCD
北大核心
2001年第2期150-153,共4页
Journal of Stratigraphy
基金
国家自然科学基金会资助项目!(No.4980 2 0 12 )
"九五"攀登专项!(SSER)的研究成果之一
