鄂东地区中侏罗统陆相层序地层及其主控因素  

The sequence stratigraphy and its main controlling factors of the middle Jurassic in Edong area

作　　者：段凯波[1,2] 陈留勤[1,2] 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]中国地质大学(北京)地质过程与矿产资源国家重点实验室,北京100083

出　　处：《大庆石油学院学报》2011年第1期15-20,114,共6页Journal of Daqing Petroleum Institute

基　　金：国家自然科学基金项目(49803012;40472065);中国石油化工股份有限公司科技工程重点项目(QZ-2005-06)

摘　　要：中侏罗统在鄂东盆地零星散布,应用现代沉积学理论和陆相层序地层学原理,结合露头、薄片、古生物等资料,分析沉积相、物源、构造背景等.结果表明:中侏罗统主要为辫状河、辫状河三角洲及滨浅湖-半深湖沉积体系,可划分为4个三级层序,而整个中侏罗统大致相当于1个二级层序;成因层序的形成受控于秦岭-大别山造山带与中扬子前陆盆地强构造运动背景影响下的构造升降、物源供给、搬运和剥蚀能力、地貌地势变化等的共同作用,而同沉积时期的江南隆起带和相邻盆地对层序的形成也有贡献.The middle Jurassic is dispersed in Edong Basin.On the basis of information from field outcrops,rock thin sections and paleontology,by the principle of advance sedimentology and continental sequence stratigraphy and the analysis sedimentary facies,provenance,tectonic background,it's known that the middle Jurassic in Edong Area is characterized by braided river,braided-river delta,shallow lake and deep lake sedimentary system,which is divided into approximately 4 third-order sequences and they are equal to 1 second-sequence.The development of sequence is determined by the interaction of tectonic vertical movement,provenance supply,the abilities of transport and denudation,terrains which all are affected by the movement and deformation tectonic background from Qinling-Dabieshan orogenic belt and Mid-Yangtze foreland basin.While provenance from syndepositional stage Jiangnan uplift belt and basins vicinity also contribute to the sequences.

关 键 词：中侏罗统 鄂东盆地 三级层序 构造背景 主控因素 

分 类 号：P539[天文地球—古生物学与地层学]