米仓山南缘寒武纪岩石地层及层序地层  

THE LITHOSTRATIGRAPHY AND SEQUENCE STRATIGRAPHY OF CAMBRIAN IN THE SOUTH OF MICANGSHAN AREA

作　　者：赵兵[1] 杜思清[1] 徐新煌[1] 

机构地区：[1]成都理工学院地质学系

出　　处：《矿物岩石》1997年第S1期21-31,共11页Mineralogy and Petrology

摘　　要：本文对米仓山南缘寒武纪地层进行了详细的剖面描述和岩石地层划分，自下而上划分为筇竹寺组、仙女洞组、阎王碥组、石龙洞组和陡坡寺组。孔明洞组采用石龙洞组一名，同时对筇竹寺组、阎王碥组及陡坡寺组进行细分，并讨论了各组段的空间变化规律。首次将该区寒武纪地层划分为四个层序、一个超层序，并分析了各层序的组成和时限。认为该区寒武纪地层具明显的东西向变化规律。The lithostratigraphy of Cambrian is described and subdivided in detail in the South of Micangshan area. They are the Qiongzhusi Fm.,Xiannudong Fm.,Yanwangbian F m.,Shilongdong F m. and Douposi F m. It is in the first time that the Shilongdong F m. is substituted for the Kongmingdong F m. Besides the Qiongzhusi F m.,Yanwangbian F m. and Douposi F m. are futher subdivided into several members. Spacial variation of each lithostratigraphic unit is discussed. Four sequences of Cambrian in this area are recongnized which consist of a supersequence. The characteristics of systems tract and average time limit of each sequence are analysed. It was concluded that there is a obious eastwest variation of Cambrian in the South of Micangshan area.

关 键 词：米仓山南缘 寒武纪 岩石地层 层序 超层序 体系域 

分 类 号：P534.41[天文地球—古生物学与地层学]