地质科学2024，Vol.59Issue(2)：271-287,17.DOI:10.12017/dzkx.2024.019
塔里木盆地西北缘乌什西次凹的地层系统和构造特征
The stratigraphic system and structural characteristics of the western subsag of Wushi Sag,NW Tarim Basin
摘要
Abstract
The western subsag of Wushi Sag is located in the northwest margin of Tarim Basin and belongs to Kuqa Depression.It is located between the main mountain range of the South Tianshan Mountain(Halke Mountains)and the Kalpin-Wenshu uplift.In terms of regional tectonic framework,it is the natural extension of Tarim Craton to the northwest.The Akqi fault on the northern margin of western subsag of Wushi Sag is the boundary between the southern Tianshan orogenic belt and the Tarim Craton.A Late Precambrian to Paleozoic stratigraphic system similar to that on the Kalpin-Wenshu uplift,including Cambrian,Ordovician and Carboniferous source rocks,is developed in the subsag.Neogene-Quaternary clastic formation directly unconformably overlie the deformed Paleozoic passive continental margin clastic-carbonate formations.In profile,it thickens towards the South Tianshan and thins towards the Tarim Craton,showing a typical profile feature of foreland basin.This is a Late Cenozoic intracontinental foreland basin superimposed on the Late Hercynian to Yanshanian paleo-uplift.There are three major deformation stages,namely Middle Hercynian,Late Hercynian-Indosinian and Late Himalayan or Late Alpine.The deformation is dominated by the thick-skinned structures,while the thin-skinned structure is not developed.On the plane,the main structural line strikes NE-SW.On the profile,the thrusts are mainly from the South Tianshan to the Tarim Basin,forming a basement-involved thrust belt.关键词
晚前寒武纪—古生代地层系统/被动大陆边缘/二叠纪末—三叠纪冲断和褶皱/晚新生代陆内前陆盆地/基底卷入型构造/乌什西次凹/塔里木盆地西北缘/南天山造山带分类
天文与地球科学引用本文复制引用
王清华,杨威,周慧,缪卫东..塔里木盆地西北缘乌什西次凹的地层系统和构造特征[J].地质科学,2024,59(2):271-287,17.基金项目
国家自然科学基金项目(编号:U22B6002)和中国石油天然气股份有限公司前瞻性基础性技术攻关项目(编号:2021DJ0605)资助 （编号:U22B6002）
