四川盆地东北地区上二叠统层序地层特征研究  

The Sequence Stratigraphics Characteristics of Upper Permian in the Northeastern Sichuan Basin

作　　者：李凤杰[1,2] 刘殿鹤[2] 郑荣才[1,2] 赵俊兴[2] 

机构地区：[1]成都理工大学"油气藏地质及开发工程"国家重点实验室,成都610059 [2]成都理工大学沉积地质研究院,成都610059

出　　处：《沉积学报》2009年第6期1116-1123,共8页Acta Sedimentologica Sinica

基　　金：国家自然科学基金项目(批准号:40672073)资助

摘　　要：运用层序地层学的原理,在野外剖面沉积相、岩性、岩相和可容空间变化分析的基础上,对川东北地区宣汉县渡口镇羊鼓洞上二叠统剖面的层序地层进行研究,识别出3种类型6个层序界面,将上二叠统划分为1个Ⅱ层序和5个Ⅲ级层序,其中吴家坪组划分为3个Ⅲ级层序、长兴组划分为2个Ⅲ级层序。并在层序划分的基础上建立了川东北地区上二叠统的层序地层格架。将可容空间变化曲线与露头层序地层划分之间进行对比发现,二者之间存在着良好的对应关系。这不仅验证了层序划分的正确性,而且说明了F ischer图解旋回分析技术的实用性和客观性。On the basis of stratigraphic theory and the analysis of sedimentary facies, lithology and lithofacies and the changing of accommodation of field profile, sequence stratigraphy are researched to the upper Permian at Yanggudong profile in Dukou town, Xuanhan County, Northeastern of Sichuan Basin. Three types and six stratigraphic sequences boundary are discriminated. One 2-order sequence and five 3-order sequences in upper Permian , three 3-order se- quences in Wujiaping Formation and two 3-order sequences in Changxing Formation are discriminated. We have constructed the sequence stratigraphic framework of upper Permian on the basis of sequence dividing. By the correlation of the change of accommodation curve and outcrop sequence stratigraphic dividing, there is a very well corresponding relation between the two curves. The relation not only verifies the correct of classification of the sequence stratigraphy but also shows the practicality and objectivity of cycle analysis technique of Fischer plot.

关 键 词：层序地层 Fischer图解 上二叠统 川东北地区 

分 类 号：P539.2[天文地球—古生物学与地层学]