新疆博格达山北缘二叠纪中—晚期构造运动的沉积响应  

Sedimentary response of tectonic movement in the Middle and Late Permian in the northern margin of Bogda Mountain,Xinjiang

作　　者：鲁智帅 谢庆宾 张津宁[1,2] 祁利祺 许涛 陈佳 相泓含 LU Zhishuai;XIE Qingbin;ZHANG Jinning;QI Liqi;XU Tao;CHEN Jia;XIANG Honghan(Petroleum Institute,China University of Petroleum(Beijing),Karamay Campus,Karamay,Xinjiang,834000;School of Earth Sciences,China University of Petroleum(Beijing),Beijing,102249)

机构地区：[1]中国石油大学(北京)克拉玛依校区石油学院,新疆克拉玛依834000 [2]中国石油大学(北京)地球科学学院,北京102249

出　　处：《地质论评》2024年第1期102-122,共21页Geological Review

基　　金：新疆维吾尔自治区引进高层次人才项目(编号:JXDF0251);新疆维吾尔自治区自然科学面上基金项目(编号:2022D01A248);克拉玛依市创新环境建设计划项目(编号:20212022hjcxrc0035);中国石油大学(北京)克拉玛依校区科研启动项目(编号:XQZX20220002)的成果。

摘　　要：博格达山北缘是准噶尔盆地与天山造山带之间的关键部位,是研究盆山关系的重点区域。博格达山北缘二叠纪中、晚期的构造演化与沉积时空演变关系存在较大争议。本研究通过野外实地勘测、镜下岩石薄片鉴定、粒度分析实验和地震资料解析等方法,针对博格达山北缘东、西部两条剖面—大龙口剖面和井井子沟剖面开展研究,分析其沉积类型和演变过程,解析盆山构造变形和发育特征,探讨构造运动的沉积响应。研究结果表明:瓜德鲁普统乌拉泊组为湖成三角洲相,井井子沟组至红雁池组为湖泊相,乐平统泉子街组为冲积扇—河流相沉积,梧桐沟组和锅底坑组为滨浅湖—三角洲相沉积;研究区可分为两个主要构造层,下构造层以伸展断陷为主要结构,上构造层以前陆冲断为主要构造变形;多期构造活动控制瓜德鲁普统、乐平统沉积演化过程,在挤压构造背景下,瓜德鲁普统的湖泊相转变为乐平统冲积扇—河流相沉积,晚期构造活动趋于稳定,区域进入准平原化作用阶段。Objectives:The northern margin of Bogda Mountain is the key part between Junggar Basin and Tianshan Orogenic Belt,and is the key area to study the relationship between basin and mountain.The relationship between the tectonic evolution and sedimentary temporal and spatial evolution of the Middle and Late Permian in the northern margin of Bogda Mountain is controversial.Methods:By means of field survey,microscopic rock thin section identification,particle size analysis experiment and seismic data analysis,two sections of the eastern and western Bogda Mountain north margin,Dalongkou section and Jingjingzigou section,were studied to analyze their sedimentary types and evolution process,analyze the tectonic deformation and development characteristics of the basin—mountain,and explore the sedimentary response of tectonic movement.Results:The results show that the Guadalupian Wulabo Formation is lucustrine—delta facies,the Jingjingzigou Formation to the Hongyanchi Formation is lacustrine facies,the Lopingian Quanzijie Formation is alluvial fan—fluvial facies,and the Wutonggou Formation,the Guodikeng Formations are shoal shallow lucustrine—delta facies.The study area can be divided into two main structural layers,the lower structural layer with extensional fault depression as the main structure,and the upper structural layer with foreland thrust as the main structural deformation Conclusions:Multi-stage tectonic activities controlled the sedimentary evolution of Guadalupian and Lopingian.Under the compressional tectonic background,the lacustrine facies of Guadalupian transformed into Lopingian alluvial fan—fluvial facies,and the tectonic activities tended to be stable in the late period,and the region entered the peneplanization stage.

关 键 词：博格达山 大龙口 井井子沟 沉积相 构造活动 沉积构造响应 

分 类 号：P618.13[天文地球—矿床学]