霍尔果斯背斜构造变形特征及空间展布规律  

Structural Deformation Characteristics and Spatial Distribution Law of Horgos Anticline

作　　者：李咏絮 周小军[1] Li Yong-xu;Zhou Xiao-jun

机构地区：[1]西南石油大学地球科学与技术学院,四川成都610500

出　　处：《化工设计通讯》2022年第1期11-13,共3页Chemical Engineering Design Communications

摘　　要：霍尔果斯背斜位于准噶尔盆地南缘,受南北向挤压应力和滑脱层空间分布的控制,构造变形强烈。采用断层相关褶皱理论、平衡剖面技术、三维构造建模方法,解释高品质地震剖面、统计构造缩短量、厘清背斜空间展布规律。研究发现,垂向上,霍尔果斯背斜由深部的断层转折褶皱、中深部的复合型构造三角楔、浅部的突发构造和断层传播褶皱叠加而成;应力方向上,在持续挤压应力作用下依次发育断层转折褶皱、构造三角楔、突发构造、滑脱褶皱、断层传播褶皱,构造缩短量为4.5~10km;背斜走向上,构造样式相近,中段变形强度最强,向两侧逐渐减弱。Horgos anticline is located in the southern margin of Junggar basin.Controlled by the spatial distribution of North-South compressive stress and detachment layer,the structural deformation is strong.In this paper,fault related fold theory,balanced section technology and three-dimensional structural modeling method are used to explain high-quality seismic section,count structural shortening and clarify the spatial distribution law of anticline.It is found that,vertically,the Horgos anticline is formed by the superposition of deep fault turning folds,middle and deep composite structural triangular wedges,shallow burst structures and fault propagation folds;In the stress direction,under the action of continuous compressive stress,fault turning fold,structural triangular wedge,sudden structure,detachment fold and fault propagation fold are developed successively,and the structural shortening is 4.5~10km;In the anticline strike,the structural style is similar,the deformation intensity in the middle section is the strongest,and gradually weakens to both sides.

关 键 词：霍尔果斯背斜 断层相关褶皱 复合型构造三角楔 构造正演模拟 三维构造建模 

分 类 号：P618.13[天文地球—矿床学]