赣西西部中晚二叠世地层旋回地层学研究  

Late Permain Cyclostratigraphy in the Western Jiangxi Province

作　　者：肖光荣[1] 

机构地区：[1]江西省地质矿产勘查开发局赣西地质调查大队,江西南昌330030

出　　处：《东华理工大学学报（自然科学版）》2012年第4期335-342,共8页Journal of East China University of Technology(Natural Science)

摘　　要：本文以赣西西部米级旋回层序研究为基础,依据其平面展布及垂向叠加形式进行三级旋回层序划分,从中二叠世的鸡公岭组至晚二叠世的长兴组共划分出6个三级旋回层序,其时限约5.5Ma。通过中二叠世米级旋回层序的统计,它可能与地球轨道黄赤交角旋回相当(4万年)。该区米级旋回层序相序特征,反映出4次明显的拉张期,即栖霞早期、小江边期、南港期及乐平晚期。依据其空间展布,它们均为陆表海中的裂隙槽或深海沟,表明印支运动作用非常强烈,同时也为钦州造山带"开、合"运动在该区的表现。Based on meter class cyclical sequence at Western Jiangxi and the Third-grade sequences from its plane spread and vertical superposition form. The Third-grade sequences from Permian chicken male ridge group to the late Permian changxing group is divided into six level, Three base-level cycle sequences. The time limit is about 5.5 Ma. Through the statistics in Permian meter scale base-level cycle sequences, it may be an earth orbit obliq- uity of the ecliptic spinning back quite （forty thousand years ）. Development meter scale base-level cycle se- quence features, the four obvious pull period is dictated, i.e. Qixia early, Xiao Jiangbian period, Nangang period and Yaumcha late. On the basis of the spatial distribution, both are fissure slot or deep-sea trench in the epiconti- nental sea. Intensely indosinian movement is indicated as well as the performance of Qinzhou orogenic belt.

关 键 词：赣西西部 旋回地层学 米级旋回层序 三级旋回层序 

分 类 号：P535[天文地球—古生物学与地层学]