首页> 中文期刊> 《断块油气田》 >沉积期构造转换带类型、空间展布及其控制因素

沉积期构造转换带类型、空间展布及其控制因素

         

摘要

为研究查干凹陷巴音戈壁组二段沉积期及苏红图组一段沉积期构造转换带类型及空间展布规律,并进一步明确其控制因素,在断裂体系解析基础上,采用同沉积断层生长指数的分析方法,进行古断裂体系恢复,参考构造转换带动态演化的综合分类模式,将构造转换带分为9种类型,每种类型按发育程度细分为初期、中期、后期3个时期 构造转换带类型多为平行亚类同向型中期、平行亚类同向型后期、平行亚类聚敛型中期等,主要分布于巴润断裂带 动力学机制显示,查干凹陷伸展作用由英格特-巴格毛德变质核杂岩活动导致的拆离滑脱引起,而走滑环境与阿尔金走滑断裂及其分支——巴丹吉林断裂的活动有关.沿巴润断裂带依次发育平行亚类同向型和平行亚类聚敛型构造转换带,主要与英格特-巴格毛德变质核杂岩拆离滑脱依次形成的同向、反向侧列断层有关;而同向、反向断层之间发育各型中期转换带,与阿尔金断裂及巴丹吉林的走滑活动有密切关系.%In order to find out the types,spatial distribution and determine the control factors of the structural transfer zone during the deposition of Bayingebi Formation Member 2 and Suhongtu Formation Member 1,Chagan Sag,the growth index of the synsedimentary fault was analyzed on the basis of ancient fault systems analyses in order to restore the ancient fault systems systematically.According to the comprehensive classification of dynamic development of structural transfer zones,the transfer zone is classified into 9 types,with 3 stages(early stage,mid-stage and late stage) in each type.The main types of the structural transfer zone are the mid-stage of the same-direction type in the parallel subtype,the late stage of the same-direction type in the parallel subtype,and the mid-stage of the convergent type in the parallel subtype,which are distributed mainly in the Barun Fault Zone.The mechanism study reveals that the extension of the Chagan Sag is caused by the activities of the Inglot-Bagemaode metamorphic core complex.And the detachment is related to the activities of the Arkin Fault and its branch Badanjilin Fault.Along the Barun Fault Zone,there respectively developed the same-direction type in the parallel subtype and the opposite-direction type in the parallel subtype,which have a close relationship with the same-direction faults and opposite-direction faults caused by the detachment of the Inglot-Bagemaode metamorphic core complex.The mid-stage transfer zone of the same-direction faults and the opposite-direction faults is related to the activities of the Arkin Fault and the Badanjilin Fault.

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