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
胡晓春
摘要(Abstract):
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。
关键词(KeyWords): 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
基金项目(Foundation): 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
作者(Author): 胡晓春
DOI: 10.19839/j.cnki.dcxzz.2010.03.008
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