舞阳凹陷盐岩沉积与构造的响应关系  

The Response Relation Between Salt Sediment and Tectonic Activity in Wuyang Depression

作　　者：孔敏[1] 石万忠[1] 宋志峰[1] 王晓龙[1] 

机构地区：[1]中国地质大学(武汉)资源学院石油系,武汉430074

出　　处：《沉积学报》2010年第2期299-306,共8页Acta Sedimentologica Sinica

基　　金：国家自然科学基金项目(批准号:40602015);中国地质大学(武汉)优秀青年基金(编号:CUGQNL0605);中国地质大学(武汉)湖北省油气勘探开发理论与技术重点实验室开放基金(编号:YQ2006KF17)联合资助

摘　　要：舞阳凹陷在核二1时期开始沉积大量的盐岩,核一段沉积末期盐岩消失。依据地震资料与钻井资料,采用定量与定性相结合的方法,从时空上分析该凹陷盐岩沉积与构造的响应关系,得出如下2个结论:(1)核二2段沉积末期是舞阳凹陷的一个重要构造转换期,在该时期受构造挤压作用舞阳凹陷开始抬升,基底走滑构造开始活化,核三段—核二2段沉积地层与核二1—核一段沉积地层有明显的差异。(2)舞阳凹陷的盐岩沉积与构造有明确的响应关系,构造活动控制了盆地边界的变化,使之成为一个较为封闭的凹陷,进而减少了进入盆地的物源,盐岩开始沉积。At He 21 sedimentary stage,there appeared a lot of salt sediments while they all disappeared at the end of He_1 stage in Wuyang depression.Both of qualitative method and quantitative method are used in this paper,which can recover the relationship between salt sediment and tectonics effectively in this sag.Through this study,two results are as follows：（1） The sedimentary end of He 22 section is a very important tectonic activity stage,when the whole depression began uplift while the basal strike-slip tectonic started to reactivate.The He 3 and He 22 sedimentary stratum which deposited before the key stage have obvious difference with the ones of He 21 and He 1 that deposited after the key stage.（2）The response relation between salt sediment and tectonic activity is definite in Wuyang sag.The tectonic activity controlled the change of basin boundary,which made the study area a relatively closed depression,then decreased the provenance into the basin,the salt started to deposit.

关 键 词：盐岩沉积 走滑构造 盆地边界恢复 基准面 舞阳凹陷 

分 类 号：P512.2[天文地球—地质学]