中元古代鄂尔多斯盆地南缘裂谷沉积相与震积岩序列  

Mesoproterozoic sedimentary facies and seismites sequence division in the southern margin of Ordos basin

作　　者：卢勉[1] 陈友智[2] 吴高平[3] 彭伟[4] 王丽丽 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]浙江大学地球科学系,浙江杭州310027 [3]大庆油田有限责任公司第九采油厂,黑龙江大庆163712 [4]江汉油田勘探开发研究院,湖北武汉430023 [5]吉林油田分公司扶余采油厂,吉林松原138001

出　　处：《东北石油大学学报》2013年第2期37-45,90,共10页Journal of Northeast Petroleum University

基　　金：中国博士后基金项目(2012M521160)

摘　　要：鄂尔多斯盆地南缘中元古代处于拉张期,发育多裂谷系.分析鄂尔多斯盆地野外地质调查、物探和钻井等资料,划分沉积相剖面,研究沉积演化及相类型.结果表明:盆地南缘中元古代沉积陆相三角洲至海陆过渡相的长城系与滨浅海至深海盆地相的蓟县系,并于蓟县系中发现液化底劈构造、震褶岩、震裂岩、震浊积岩、津浪丘状层和风暴岩等震积岩序列单元;沉积水体逐渐加深,为裂谷非补偿型沉积,蓟县系中存在震积岩序列,反映该区中元古代盆地南缘处于裂谷带内,受裂陷作用持续影响.通过沉积相及震积岩序列划分耦合裂谷说,为区域构造研究提供佐证.The basement of Ordos basin synthetized and matured in Archaean.Early proterozoic sediment covered on the stable crystalline basement.Mesoproterozoic southern margin of Ordos basin was in tension stage with the development of some rifts.We found that Mesoproterozoic Changcheng system covered continental delta to transitional facies and Jixian system covered shallow sea to deep-sea basin facies in southern margin of the basin by field geological survey.The latter developed storm rock unit of seismites,such as liquefaction of bottom split,shock fold rock,shatter rocks,seismic turbidite,tsunami hummocky layer,tempestite and so on.Sedimentary facies suggested that sedimentary water bodies were deepening gradually,and performed as starved deposition,which coupled with seismites sequence in Jixian system.It shows that there was in a rift environment and influenced continually by it in the southern margin of Ordos basin.The sedimentary facies and seismites sequence coincide with the rift dealt with in this paper,which provides evidences for regional tectonic study.

关 键 词：裂谷 震积岩 沉积相 中元古代 鄂尔多斯盆地 

分 类 号：TE122.3[石油与天然气工程—油气勘探]