准噶尔盆地白家海凸起的石炭系地质结构与成因模型  

Geological structure and genesis model of the Baijiahai uplift in the Junggar Basin

作　　者：张磊 何登发[1] 李涤[1] 冀冬生 梁宇生 郑孟林[3] 吴松涛 周歌 ZHANG Lei;HE Dengfa;LI Di;JI Dongsheng;LIANG Yusheng;ZHENG Menglin;WU Songtao;ZHOU Ge(Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism (Ministry of Education),China University of Geosciences (Beijing),Beijing 100083,China;Geophysical Research Institute,Petroleum Exploration and Development Institute,PetroChina Xinjiang OUfield Company,Urumqi 830000,China;Petroleum Exploration and Development Institute,PetroChina Xinjiang Oilfield Company,Karamay 834000,China)

机构地区：[1]中国地质大学(北京)海相储层演化与油气富集机理教育部重点实验室,北京100083 [2]中国石油新疆油田分公司勘探开发研究院地球物理研究所,新疆乌鲁木齐830000 [3]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

出　　处：《地学前缘》2019年第1期149-164,共16页Earth Science Frontiers

基　　金：国家自然科学基金青年项目(41702110);国家科技重大专项(2017ZX05001-001);国家重点研发计划项目(2017YFC0601405)

摘　　要：利用最新探井、高分辨率地震、年代学资料、古生物资料,并结合盆地周边露头资料等,通过地震剖面精细解释,削蚀、超覆尖灭点追踪识别及平衡剖面技术等,对白家海凸起的地质结构、演化和成因模型进行了综合分析,并取得以下4点认识:(1)白家海凸起纵向上发育深、浅两套断裂系统,深层断裂由一系列倾向相同的正断层组成,控制了石炭纪断陷的发育,断陷主要呈北东和北北东两个方向展布,白家海凸起地质结构整体呈现出"纵向分层、横向分带"的特点;(2)白家海凸起的构造演化可分为6个阶段,分别是(1)早石炭世"坳-断-坳"旋回、(2)晚石炭世"坳-断-坳"旋回、(3)早—中二叠世的挤压反转阶段、(4)晚二叠世—中侏罗世西山窑组沉积期的稳定埋藏阶段、(5)中侏罗世头屯河组沉积期—晚侏罗世的改造阶段、(6)白垩纪—现今的调整、定型阶段;(3)早石炭世末期和晚石炭世末期各发生一次构造挤压活动,形成了两个区域性不整合;(4)北天山洋俯冲过程中的板片后撤作用(roll-back),可能是白家海凸起石炭纪断陷发育的深部动力学机制。In this study,we carried out a comprehensive study on the geostructure,petrogenesis and evolution of the Baijiahai uplift using the latest drilling and high -resolution seismic,chronological and paleontological data in combination with basin's outcrop data.Through detailed interpretation of seismic profiles,truncation and overlap tracking as well as balanced section technology,we obtained the following four main results:(1)The Baijiahai uplift develops upward deep and shallow fault systems,where the deep fault system consists of a series of normal faults with the same trend,controlling the development of the Carboniferous fault depression mainly in the NE-and NNE-directions.The overall geological structure of the Baijiahai uplift shows a "vertical layering,horizontal zoning"characteristics.(2)The tectonic evolution in the Baijiahai area can be divided into six stages:i)Early Carboniferous "depression -fault depression - depression"cycle;ii)Late Carboniferous "depression -fault depression -depression"cycle;iii)Early - Middle Permian compression and reversal tectonic;iv)Permian -Middle Jurassic Xishanyao Formation depositional period stable burial;v)Middle Jurassic Toutunhe Formation sedimentary period to Late Jurassic transformation;and vi)Cretaceous to present adjustment and setting.(3)Two structural tectonic events occurred at the end of the Early Carboniferous and Late Carboniferous,respectively,resulting in two regional unconformities.(4)The Carboniferous fault depression is an arc-related fault depression,where the "roll -back"effect from the northern Tianshan Ocean subduction process created a tensional environment inside the arc,thus providing a possible deep dynamic mechanism for the development of fault depression herein.

关 键 词：地质结构 构造演化 成因模型 石炭系 白家海凸起 准噶尔盆地 

分 类 号：P618.130.2[天文地球—矿床学]