摘要
毗邻南天山的库车坳陷北部构造带的构造变形非常强烈,且表现出明显的分段差异性。结合地面露头、CEMP资料及最新的地震资料解释,建立了北部构造带不同区段的构造变形模型,利用平衡剖面技术复原了其中—新生代演化过程,并探讨了导致分段构造变形差异的主要因素。研究表明:1)北部构造带的乌什—阿瓦特—博孜一线以北为造山楔—中生界、新生界两层不协调收缩变形,克拉苏以北为造山楔、中生界、新生界3层不协调收缩变形,迪那以北为造山楔—中生界—古近系、新近系两层不协调收缩变形,吐格尔明及东部地区以北各构造层的变形相对协调,仅局部存在分层收缩变形现象。2)北部构造带的收缩构造变形主要发生在上新世—第四纪,但至少经历了晚侏罗世、晚白垩世、中新世等断续的收缩变形期。3)北部构造带的分段、分层变形差异,主要受中生界的煤岩和泥岩,古近系和新近系的盐岩等软弱岩层的差异分布,盆地基底先存断裂及南天山新生代隆升程度差异等因素控制。
The Kuqa Depression,located in the north of Tarim Basin,is filled with thick Mesozoic-Cenozoic sedimentary layers,and has undergone significant contraction structural deformation.The structural deformation of the northern monocline zone of the Kuqa Depression,adjacent to the South Tianshan Mountains,is very strong and shows obvious segmentation differences.This article is based on the latest seismic and CEMP data interpretation,combined with the observation of surface outcrop geological profiles at the edge of the basin,to establish structural deformation models for different sections of the northern monocline zone.Based on the principle of balanced geological profiles,the evolution process of the Mesozoic-Cenozoic structures is reconstructed,and the main factors controlling structural deformation and causing segmentation differences are explored.Research has shown that:1)the northern monocline zone generally exhibits layered contraction deformation on the Haixi orogenic wedge slope of the South Tianshan Mountains,and exhibits segmented differences along the strike direction.Among them,to the north of the Ush-Awat-Bozi line is the incompatible contraction deformation of the orogenic wedge-Mesozoic and Cenozoic layers,to the north of Kelasu is the incompatible contraction deformation of the orogenic wedge,Mesozoic and Cenozoic layers,to the north of Dina is the incompatible contraction deformation of the orogenic wedge-Mesozoic-Paleogene and Neogene layers,and to the north and the east of Turming,the deformation of each structural layer is relatively coordinated,with only local layered contraction deformation between different structural layers.2)The contraction deformation of the northern monocline zone mainly occurred during the Pliocene-Quaternary,but at least experienced intermittent contraction deformation periods such as the end of the Middle Jurassic,Late Cretaceous,and Miocene.3)The structural deformation segmentation and layering differences in the northern monocline are mainly controlled by factors such as the thickness and lithology of the Mesozoic and Cenozoic sedimentary layers(especially weak rock layers such as coal and mudstone layers in the Mesozoic,and salt layers in the Paleogene and Neogene),pre-existing faults in the southern Tianshan orogenic wedge of the basin basement(especially those with inherited activities in the Mesozoic and Cenozoic),and differences in the degree of uplift in the southern Tianshan during the Cenozoic.
作者
罗浩渝
杨克基
申林
张鹏越
王珩
杨航
漆家福
Luo Haoyu;Yang Keji;Shen Lin;Zhang Pengyue;Wang Heng;Yang Hang;Qi Jiafu(R&D Center for Ultra‑Deep Complex Reservoir Exploration and Development,CNPC,Korla,Xinjiang 841000;Key Laboratory of Strategic Key Mineral Resources in Hebei Province,Hebei University of Geosciences,Shijiazhuang 050042;Engineering Research Center for Ultra‑Deep Complex Reservoir Exploration and Development,Xinjiang Uygur Autonomous Region,Korla,Xinjiang 841000;Xinjiang Key Laboratory of Ultra‑Deep Oil and Gas,Korla,Xinjiang 841000;Comprehensive Physical and Chemical Exploration Department(the Fifth Department)of Eastern Geophysical Exploration Company,Zhuozhou,Hebei 072750;College of Earth Sciences,China University of Petroleum(Beijing),Beijing 102249)
出处
《地质科学》
北大核心
2025年第3期619-634,共16页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
河北地质大学国家预研基金项目(编号:KY2024YB10)
塔里木油田科技攻关项目(编号:DD20220023)资助。
关键词
北部构造带
构造变形
盐构造
形成演化
控制因素
Northern tectonic zone
Structural deformation
Salt structure
Formation and evolution
Control factors
