鄂尔多斯盆地西缘银洞子地区构造特征研究  

Study on structural characteristics of Yindongzi area,western margin of Ordos Basin

作　　者：冯娟萍[1,2] 姚韦卓 张江华 欧阳征健 Feng Juanping;Yao Weizhuo;Zhang Jianghua;Ouyang Zhengjian(College of Geology and Environment,Xian University of Science and Technology,Xian 710054;Geological Research Institute for Coal Green Mining,Xian 710054;Xinchun Oil Production Company,SINOPEC,Tacheng,Xinjiang 834700;Bailie School of Petroleum Engineering,Lanzhou City University,Lanzhou 730070)

机构地区：[1]西安科技大学地质与环境学院,西安710054 [2]煤炭绿色开采地质研究所,西安710054 [3]中石化新疆新春石油开发有限责任公司,新疆塔城834700 [4]兰州城市学院培黎石油工程学院,兰州730070

出　　处：《地质科学》2025年第2期389-399,共11页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家自然科学基金青年项目(编号:41502107);国家留学基金委公派留学项目(编号:202008610035)资助。

摘　　要：厘清鄂尔多斯盆地西缘南段银洞子地区的构造特征,是选择合理的、客观的地震地质解释方案的前提和基础。通过详细野外地质调查、构造解析和室内地震地质解释相互印证的方法,笔者对银洞子地区构造特征进行研究,以选取合理的地震地质解释方案。结果表明:银洞子地区共经历了4个主要演化阶段,分别是加里东期“古脊梁”形成,燕山中期构造变形定型,燕山晚期的前期伸展和后期整体抬升遭受剥蚀,喜马拉雅期构造调整兼走滑。深层滑脱型单向西倾冲断构造为研究区的基本构造模式;其中,基本构造样式为一系列西倾单向叠瓦状冲断组合,表现为自东向西依次出露奥陶系、寒武系和元古宇,变形强度、抬升幅度依次增强,而滑脱层主要发育于深层。对银洞子地区地震剖面进行综合地质解释表明,深层滑脱型单向西倾冲断构造模式是研究区客观的、合理的地质解释模式。研究成果对于鄂尔多斯盆地西缘油气勘探区带优选和地震地质解释具有重要的参考价值。It is the prerequisite and basis of choosing reasonable and objective seismic and geological interpretation scheme to study the structural features of Yindongzi area in the southern section of western margin of Ordos Basin.In this paper,the structural features of the research area are studied by means of detailed field geological investigation,structural analysis and seismic and geological interpretation methods,and a reasonable seismic and geological interpretation scheme is selected.It is shown that Yindongzi area has experienced the paleo‐uplift belt forming stage in Caledonian,tectonic deformation and shaping stage of Middle Yanshanian,extension of early stage and overall uplift suffered denudation of late stage in Late Yanshanian and tectonic adjustment and strike‐slip stage in Himalayan.The basic structural style is a series of west‐dipping unidirectional imbricate‐like thrust assemblage that outcrops Ordovician,Cambrian and Proterozoic system from east to west,increasing gradually of deformation intensity and uplift amplitude.The detachment developed mainly in the deep layer.Therefore,the deep west‐dipping unidirectional thrust is the fundamental structural model in Yindongzi area.Based on the above geological facts,the comprehensive geologic interpretation of seismic profiles in Yindongzi area are done.It is indicated that the structural model of deep west‐dipping unidirectional thrust is reasonable,correct and objective seismic and geological interpretation scheme.This is of great significance to the selection of oil and gas exploration zones and seismic and geological interpretation in this area.

关 键 词：鄂尔多斯盆地 构造演化 构造样式 地震地质解释方案 

分 类 号：TE121[石油与天然气工程—油气勘探]