基本层序和相分析是区调中组建立的基础

Sequence-stratigraphy and Facies Analysis——Basisfor the Establishment of Formation in Geological Survey

以赣西北地区中、上寒武统划分为例,阐述基本层序、相分析在岩石地层单位划分和对比中的作用、地位。划分岩石地层单位不能仅仅根据岩性特征,而必须进行基本层序和系统的相分析。在这样的基础上,划分的岩石地层单位才具有准确性、合理性和野外实用性。

Based on the division ofthe Middle-Upper Cambrian in Northwestern Jiangxi, the importance ofsequence stratigraphy and facies analysisin the lithostratigraphicaldivi sion is expounded.Itshould be pointed outthatthedivision oflithostratigraphicalunitcan not be based only on lithologicalcharacters.Thus,the sequence stratigraphy and syste matic facies analysis mustbe conducted.On by so doing,the division oflithostrtigraphical unitcan be accurate,reasonable and practicalin field.