湘西北地区震旦系斜坡相区层序地层划分与对比  

The classification and correlation of Sinian sequence stratigraphy on the slope zone in northwestern Hunan Province

作　　者：王传尚[1] 李旭兵[1] 白云山[1] 刘安[1] 

机构地区：[1]中国地质调查局武汉地质调查中心,湖北武汉430223

出　　处：《地质通报》2011年第10期1538-1546,共9页Geological Bulletin of China

基　　金：中国地质调查局项目<雪峰山西侧黔江走廊大剖面油气地质调查及地层研究>(编号:1212010782005)和<黔江及邻区油气地质地球物理调查及地层对比研究>(编号:1212011120968)

摘　　要：以湖南张家界田坪和大坪震旦系剖面为主要研究对象,开展了湘西北地区斜坡相区震旦系层序地层的划分和对比研究。根据斜坡相区三级层序的发育特点,将陡山沱组划分为5个三级层序（ZSQ1~5）,灯影组划分为4个三级层序（ZSQ6~9）。其中,陡山沱组下部的4个三级层序（ZSQ1~4）构成震旦系下部的二级层序,陡山沱组顶部的三级层序ZSQ5和灯影组的4个三级层序（ZSQ6~9）构成震旦系上部的二级层序。斜坡相区与台地相区震旦系层序地层的划分基本一致,可实现相互对比;斜坡相区与盆地相区震旦系只能实现二级层序的对比。Based on a study of the Tianping and Daping sections in Zhangjiajie City,Hunan Province,the authors carried out the classification and correlation of Sinian sequence stratigraphy on the slope facies in the western Hunan Province.Doushantuo Formation is divided into five 3rd grade sequences（ZSQ1-5）,and Dengying Formation is divided into four 3rd grade sequences（ZSQ6-9）.The lower four 3rd grade sequences（ZSQ1-4） constitute the lower 2nd grade sequence of Sinian,whereas the top 3rd grade sequence ZSQ5 and the four 3rd grade sequences of Dengying Formation（ZSQ6-9）constitute the upper 2nd grade sequence of Sinian.The Sinian sequence stratigraphic classification frameworks between the platform and the slope facies are consistent approximately,hence the correlation could be carried out directly.However,the sequence stratigraphic correlation between the basin and the slope facies can only be carried out in the 2nd grade sequence.

关 键 词：斜坡相区 震旦系 层序地层 湘西北 

分 类 号：P534.31[天文地球—古生物学与地层学] P539.2[天文地球—地质学]