准噶尔盆地南缘西部山前褶皱—冲断带构造分带特征及形成演化  

Characteristics of tectonic zoning and formation and evolution of the pre-mountain folded-alluvial belt in the western part of the southern margin of the Junggar Basin

作　　者：姜颜良 孙文洁 马文彧 张冠杰 吴孔友[3] 孔雪 JIANG Yanliang;SUN Wenjie;MA Wenyu;ZHANG Guanjie;WU Kongyou;KONG Xue(SINOPEC Geophysical Research Institute Company Limited,Nanjing,Jiangsu 211103,China;School of Earth Resources,China University of Geosciences(Wuhan),Wuhan,Hubei 430074,China;School of Geoscience,China University of Petroleum(East China),Qingdao,Shandong 266580,China;School of Petroleum Engineering,Shandong Institute of Petroleum and Chemical Technology,Dongying,Shandong 257000,China)

机构地区：[1]中石化石油物探技术研究院有限公司,江苏南京211103 [2]中国地质大学(武汉)资源学院,湖北武汉430074 [3]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [4]山东石油化工学院油气工程学院,山东东营257000

出　　处：《东北石油大学学报》2024年第1期13-25,I0002,I0003,共15页Journal of Northeast Petroleum University

基　　金：中国科学院先导科技A类专项(XDA14010301);山东省自然科学基金青年基金项目(ZR2020QD051)。

摘　　要：准噶尔盆地南缘西部构造呈新的构造叠置特征和复杂的复合叠加构造样式,叠加构造在空间分布上具有明显的分带特征。根据野外地质调查和地震解释资料,采用平衡剖面恢复、楔型构造理论和构造地质学分析方法,研究复杂叠加构造变形差异及分带特征。结果表明:准噶尔盆地南缘西部发育受基底卷入与顺层滑脱联合与差异控制下的空间断褶体系,褶皱发育受断层控制,褶皱与断层相互叠加形成构造楔、双重构造、突发构造等复合构造样式,表现为多期活动特征。研究区按构造变形性质及变形差异可划分为山前逆冲推覆构造带、基底卷入型褶皱—冲断带、盖层滑脱型褶皱—冲断带3个构造带;其中,基底卷入型褶皱—冲断带与第一排断褶带重合,受控于基底卷入型断裂体系,发育基底卷入式大型构造楔、背形堆垛式双重构造与前倾双重构造,背斜轴线与断层线平面重合度高;盖层滑脱型褶皱—冲断带包括第二和第三排断褶带,受控于顺层滑脱型断裂体系,发育断展褶皱,背斜轴线与断层线平面重合度低,构造垂向上具有分层差异,构造变形程度自南向北表现为由强至弱。挤压应力作用的时期和强度、滑脱断层的向北滑脱、构造楔的楔入长度及推挤距离、滑脱层的厚度和上覆地层厚度,以及沉积时代、沉积速率和岩性差异等因素是引起研究区构造垂向分层、南北分带的原因。该结果对明确研究区构造发育及下一步油气地质勘探具有指导意义。The interpretation of high-precision seismic data reveals that the tectonics of the western part of the southern margin shows new tectonic superposition characteristics and more complex superposition composite tectonic style,and the superposition tectonics has obvious zoning characteristics in spatial distribution.Combined with the field geological investigation,seismic interpretation,equilibrium section restoration,and the use of wedge tectonic theory and tectonic geology analysis methods,the complex superposition tectonic deformation differences and zoning characteristics were investigated.The study shows that:the western part of the southern margin develops a spatial folding system under the joint and differential control of basement involvement and downstream sliding,and the development of folds is controlled by faults,which are superimposed on each other to form a tectonic wedge,double tectonics,sudden tectonics and other composite tectonic styles.The western part of the southern margin is divided into three tectonic belts,namely,the pre-mountain retrograde thrust-overthrust tectonic belt,the basement-involved fold-rupture belt,and the cover-slip fold-rupture belt,according to the nature of the tectonic deformation and the difference of the deformation,among which the basement-involved fold-rupture belt is overlapped with the first row of the fault belt and controlled by the basement-involved rupture system,and the large-scale tectonic wedge of basement-involved,the dual structure of the dorsal stacking and double-tectonics,and the double-tectonics of the forward-dipping tectonics are developed,and the dorsal axes overlap the planes of faults with high coincidence degree.The slip-type fold-rupture zone includes the second and third rows of fold zones,which are controlled by the downstream slip-type rupture system,with the development of break-spreading folds,low overlap between the dorsal axes and the fault line planes,and layered differences in the vertical direction of the tectonics;the overall degree of t

关 键 词：准噶尔盆地南缘西部 山前带 逆冲推覆构造带 褶皱—冲断带 构造样式 构造变形 分带特征 构造演化 

分 类 号：TE122.1[石油与天然气工程—油气勘探] P542[天文地球—构造地质学]