准噶尔盆地西北缘乌夏断裂带构造特征及物理模拟实验

发布时间：2018-02-08 21:27

本文关键词： 构造特征物理模拟实验乌夏断裂带准噶尔盆地西北缘　出处：《石油实验地质》2017年04期 　论文类型：期刊论文

【摘要】：依据大量地震勘探资料,对准噶尔盆地西北缘乌夏断裂带的构造特征进行了系统研究,并将其构造演化划分为碰撞前陆盆地、前陆盆地逆冲推覆、陆内拗陷逆冲褶皱、陆内拗陷抬升剥蚀和覆盖定型5个阶段。在此基础上,采用构造物理模拟实验方法对研究区典型剖面晚石炭世以来的构造演化进行了正演模拟,取得了与实际地质情况较高的吻合度。模拟结果表明,乌夏断裂带经历了由前陆盆地"前展式"逆冲向陆内拗陷"后展式"逆冲的转变。同时,实验结果进一步证实,NW-SE向挤压应力场的控制是乌夏断裂带形成、演化的根本原因,其主要受控于板块活动及造山带、边界控盆断裂的活动等关键因素。
[Abstract]:Based on a large number of seismic exploration data, the structural characteristics of the Wuxia fault zone in the northwestern margin of Junggar Basin are systematically studied, and the tectonic evolution is divided into collision Foreland basin, Foreland basin thrust nappe, intracontinental depression thrust fold. On the basis of five stages of uplift, denudation and cover setting in the intracontinental depression, the tectonic evolution since late Carboniferous in typical sections of the study area has been simulated by using tectonic physical simulation method. The simulation results show that the Wuxia fault zone has undergone a transformation from "forward expansion" of Foreland basin to "backward expansion" of intracontinental depression. The experimental results further confirm that the control of the compressive stress field in the NW-SE direction is the fundamental cause of the formation and evolution of the Wuxia fault zone, which is mainly controlled by the plate activity and orogenic belt, the boundary controlling basin fault activity and other key factors.
【作者单位】：中国石油大学胜利学院油气工程学院;华北理工大学矿业工程学院;中国石化石油勘探开发研究院无锡石油地质研究所;
【基金】：国家自然科学基金项目(40772132) 中国石油大学胜利学院重点科研计划项目(KY2015013)资助
【分类号】：P618.13

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