准噶尔东部晚古生代—中生代构造样式、变形序列及棋盘格构造的形成过程与机制  

Late Paleozoic-Mesozoic structural style,deformation sequence,and formation process and mechanism of the checkboard structure in the eastern Junggar Basin

作　　者：任新成[1] 修金磊[1] 刘林[2] 刘德志[1] 谭星宇 张北航[3] REN Xincheng;XIU Jinlei;LIU Lin;LIU Dezhi;TAN Xingyu;ZHANG Beihang(Exploration and Development Research Institute,Shengli Oilfield Company,Sinopec,Dongying 257000,Shandong,China;Exploration and Development Research Institute,Xinjiang Oilfield Company,Petrochina,Karamay 834000,Xinjiang,China;Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257000 [2]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [3]中国地质科学院地质研究所,北京100037

出　　处：《地质力学学报》2023年第2期155-173,共19页Journal of Geomechanics

基　　金：中国石化“十条龙”重大科技攻关项目(P21077-2);胜利油田科技攻关项目(YKK2121)。

摘　　要：自晚古生代以来,准噶尔盆地东部经历了多期陆内变形事件的改造,形成了独特的棋盘状构造,其形成演化是中亚造山带陆内变形的一个缩影,但其形成过程仍处于争议之中。此次研究围绕准噶尔盆地及周缘地区的二叠纪至新生代的构造变形开展研究,结果表明准噶尔盆地东部变形的驱动力主要来自不同板块边缘的相互作用,尤其是来自特提斯构造域的影响。晚二叠世,准噶尔盆地遭受了近东西向的挤压应力改造,盆地整体发生变形,形成了一系列近南北向逆冲断层和褶皱,为准东地区乃至整个盆地的棋盘格构造奠定了基础。早—中侏罗世期间,准噶尔盆地及其周缘地区经历区域性伸展,在盆地东北、西北缘均发育重要的左行张剪性走滑变形,形成了大型的走滑双冲构造。晚侏罗世,准东地区经历近东西向缩短作用,导致了侏罗纪之前的地层再次发生近南北向褶皱,变形的动力则可能来自特提斯构造域的向北作用,使准噶尔盆地经历不同程度顺时针旋转。晚白垩世,准东地区经历近南北向缩短作用,导致了之前的近南北向褶皱和断层褶皱变形,准东的棋盘格构造样式最终定型。新生代晚期,准东地区受到印度-欧亚板块碰撞远程效应的影响,但是影响范围和强度相对较小。The eastern Junggar has experienced multistage intra-continental deformations since the late Paleozoic.The checkerboard structure is one of the most notable features of the Junggar Basin,especially the eastern Junggar Basin,and its formation and evolution is a microcosm of the intracontinental deformation within the Central Asian Orogenic Belt.However,it needs to be clarified how and when the checkerboard structure developed within the Junggar Basin.In this study,we focused on Permian-Cenozoic deformations around the Junggar Basin.We proposed that the deformation was mainly driven by plate margin interaction,especially by the Tethys tectonic domain.During the Late Permian,the Junggar Basin experienced the nearly EW-trending compression,which resulted in the overall deformation of the basin and the formation of a series of nearly N-S-trending thrust faults and related folds,laying the foundation for the chessboard structure of the eastern Junggar Basin and even the entire basin.The Junggar Basin and its surrounding basins experienced regional extension during the Early-Middle Jurassic.An important sinistral transtension event occurred in the northeastern and northwestern margins of the basin,forming the large-scale strike-slip duplexes.During the Late Jurassic,the eastern Junggar Basin experienced nearly E-W shortening,which resulted in the nearly N-S-trending folding of the pre-Jurassic strata and further strengthened the original N-S-trending folds and faults.The driving force for the Late Jurassic deformation may result from the Tethys tectonic domain to the south,which also caused a clockwise rotation of the Junggar Basin.During the Late Cretaceous,the eastern Junggar Basin experienced nearly N-S-trending shortening,which led to the deformation of the previous N-S-trending folds and faults and the finalization of the checkerboard structural style.During the late Cenozoic,the eastern Junggar Basin was affected by the far-field effect of the India-Eurasian collision,but the intensity and sphere were relatively w

关 键 词：准噶尔东部 中亚造山带 中—新生代 变形序列 棋盘格构造 

分 类 号：P548[天文地球—构造地质学]