苏北盆地高邮凹陷侵入岩形成时期及成因机制探讨  

ON THE AGE AND ORIGIN OF THE INTRUSIVE ROCKS IN GAOYOU DEPRESSION OF NORTH JIANGSU BASIN

作　　者：胡晓春[1] 

机构地区：[1]中石化江苏油田分公司地质科学研究院,江苏扬州225009

出　　处：《地层学杂志》2010年第3期293-297,共5页Journal of Stratigraphy

基　　金：中石化重点攻关项目"东部老区稳产资源基础及关键技术"资助

摘　　要：通过对苏北盆地高邮凹陷的上、下两套侵入岩与断层的错断及其与构造运动强弱的关系、与油气成藏期的关系以及侵入岩的平面分布研究,提出了侵入岩的侵入时期为三垛期,而非盐城期。通过对晚白垩世以来苏北盆地各期构造运动及其伴生火山活动的分析,认为高邮凹陷侵入岩的成因主要由于晚始新世至渐新世末,该区发生了三垛运动,并发育一系列北东及北西向的断裂构造,导致了岩浆活动,并以侵入特征为主。Based on the study of the two successive sets of intrusive rocks in North Jiangsu Basin,as well as their tectonic influences,i.e. relative position,intension of influences,together with age of oil-gas capturing and the geographical distribution of the intrusive rocks,the writer proposes that the intrusive rocks were intruded in the Sanduonian age rather than Yanchengnian as previously denoted. Based on the study of geological tectonics since Late Cretaceous of North Jiangsu Basin together with their associated volcanic activities,the writer holds that the intrusive rocks of the Gaoyou Depression originated mainly from the Sanduonian Movement of Late Eocene to the end of Oligocene. With the Movement,a series of fracture zone developed,inducing magmatic activities in the area,which is characterized mainly of intrusions.

关 键 词：上、下两套侵入岩 晚始新世 渐新世 三垛运动 高邮凹陷 苏北盆地 

分 类 号：P534.61[天文地球—古生物学与地层学]