塔里木盆地雅克拉断凸断裂差异变形特征及其控制因素

doi:10.11743/ogg20180109

摘要/Abstract

摘要： 在三维地震资料解释的基础上，研究了雅克拉断凸断裂差异活动特征，探讨其控制因素。受控于白垩系厚层泥岩和新近系吉迪克组膏盐岩，雅克拉断裂构造的发育具有明显的分层性：下构造层发育大型的基底卷入型逆冲断裂，中构造层发育呈雁列式密集分布的张扭性断层，上构造层发育盖层滑脱型逆冲断层。自下而上断裂构造变形强度逐渐减弱。雅克拉断凸断裂构造的演化经历了晚古生代逆冲断裂发育阶段、中生代逆冲断裂复活调整阶段、新近纪早期张扭性断裂发育阶段、新近纪晚期滑脱型逆冲断裂发育阶段等4个关键阶段。晚古生代的断裂活动与北昆仑洋和南天山洋闭合引起的周缘地体与塔里木地块的碰撞拼合相关，中生代和新生代的断裂活动是印度欧亚板块碰撞的远程效应在塔里木盆地内的构造响应。

关键词: 差异构造变形, 断裂构造, 雅克拉断凸, 塔里木盆地

Abstract: Based on the interpretation of 3D seismic data, the differential deformation characteristics of faults in Yakela fault-salient were studied and the controlling factors were discussed.Controlled by the thick mudstone of the Cretaceous and gypsum rocks of the Jidike Formation, the development of different faults is observed in different in vertical domains.Large basement involved thrust faults were developed in the lower structural section.Echelon-distributed extensional-shear faults were developed in the middle structural section.Capping-sliding faults were developed in the upper structural layers.The intensity of fault deformation gradually decreased from bottom to top.Formation of the faults experienced 4 critical stages:thrust faults development stage in late Paleozoic, thrust faults rejuvenation stage in Mesozoic, extensional-shear faults development stage in early Neogene and capping-sliding faults development stage in late Neogene.The late Paleozoic thrusting was largely related to the collision between the Tarim continental block and the peripheral terrains due to the closing of the North Kunlun Ocean at the end of the early Ordovician, followed by the closing of the South Tienshan Ocean at the end of Permian.The fault activities in Mesozoic and Cenozoic were the tectonic response of the far-field effect of the India-Eurasia collision.

Key words: differential structural deformation, fault structure, Yakela fault-salient, Tarim Basin

中图分类号:

TE121.2

杨勇,汤良杰,刁新东,等. 塔里木盆地雅克拉断凸断裂差异变形特征及其控制因素[J]. 石油与天然气地质, 2018, 39(1): 89-97. doi: 10.11743/ogg20180109 Yang Yong,Tang Liangjie,Diao Xindong,et al. Differential deformation and its control mechanism of fault structures in Yakela fault-salient, Tarim Basin[J]. Oil & Gas Geology, 2018, 39(1): 89-97. doi: 10.11743/ogg20180109

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