【摘要】 库车坳陷克拉苏构造带是一个NEE-近EW向的冲断褶皱带。由于地表条件和构造变形的复杂性导致该构造带的地震资料品质较低,造成构造解释的多解性。本文在综合分析地面露头、区域构造背景、钻井和地震资料基础上,讨论了克拉苏构造带可能的构造解释模型,认为浅层为盖层滑脱褶皱、深层为基底卷入的楔状叠瓦构造的"分层滑脱、垂向叠置"模型能合理地解释现有可靠的构造信息。浅层构造是以库姆格列木群膏盐岩层为核或以侏罗系煤系地层为核的滑脱背斜,并被逆冲断层破坏;深层是基底卷入的中-高角度区域性反转正断层,并且在反转正断层下盘发育楔状叠瓦构造。新近纪-第四纪天山隆升产生的自天山深层向库车坳陷的斜向向上的挤压作用导致先存区域性正断层的反转位移,并控制克拉苏构造带的形成和演化。更多还原

【Abstract】 Kelasu structure zone in Kuqa depression is a contractional deformation zone,which is composed of folds and thrusts trending NEE to E-W.The varied topography and complex structure lead to the poor resolution seismic data so that it is difficult to interpret the structure using the seismic data.On the basis of geological map in surface,well and seismic data,we discuss the structural interpretation model,and conclude that the model of "detachment fold pile on the top of basement-involved thrust" could be more reasonable.The anticline in the shallower level detached in the salt-gypsum rock of the Paleaocene-Eocene Kumogelie Group or the Jurassic coal-bearing strata and break thrust developed in the anticline,but the deeper under the salt-gypsum rock developed a set of thrusts dipping to North and assembled to a wedge imbricate fan.The tailing fault in the imbricate fan is a basement-involved thrust with middle-high angle,and could be the master thrust as a result of pre-exist regional normal faults inverted.The inverted action of basement-involved normal faults induced the formation of wedged imbricate fan on the foot wall.The regional oblique-up compression from Tianshan to Kuqa as a result of uplift of Tianshan during Neogene and Quaternary,impels the pre-existing normal fault to invert and controlling the formation and evolution of Kelasu play zone.更多还原