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    塔里木盆地顺南地区18号走滑断裂带的构造几何学特征及成因机制

    毛丹凤 何登发 陈槚俊 田方磊

    毛丹凤, 何登发, 陈槚俊, 田方磊, 2023. 塔里木盆地顺南地区18号走滑断裂带的构造几何学特征及成因机制. 地球科学, 48(6): 2151-2167. doi: 10.3799/dqkx.2023.065
    引用本文: 毛丹凤, 何登发, 陈槚俊, 田方磊, 2023. 塔里木盆地顺南地区18号走滑断裂带的构造几何学特征及成因机制. 地球科学, 48(6): 2151-2167. doi: 10.3799/dqkx.2023.065
    Mao Danfeng, He Dengfa, Chen Jiajun, Tian Fanglei, 2023. Geometry Characteristics and Genesis of No.18 Strike-Slip Faults in Shunnan Area, Tarim Basin, SW China. Earth Science, 48(6): 2151-2167. doi: 10.3799/dqkx.2023.065
    Citation: Mao Danfeng, He Dengfa, Chen Jiajun, Tian Fanglei, 2023. Geometry Characteristics and Genesis of No.18 Strike-Slip Faults in Shunnan Area, Tarim Basin, SW China. Earth Science, 48(6): 2151-2167. doi: 10.3799/dqkx.2023.065

    塔里木盆地顺南地区18号走滑断裂带的构造几何学特征及成因机制

    doi: 10.3799/dqkx.2023.065
    基金项目: 

    国家自然科学基金 U19B6003-01

    详细信息
      作者简介:

      毛丹凤(1985-),女,博士研究生,主要从事含油气盆地构造分析.ORCID:0009-0005-7592-5934.E-mail:maodanfeng2022@126.com

      通讯作者:

      何登发,教授,从事构造地质学研究.E-mail:hedengfa282@263.net

    • 中图分类号: P548

    Geometry Characteristics and Genesis of No.18 Strike-Slip Faults in Shunnan Area, Tarim Basin, SW China

    • 摘要: 为深化塔里木盆地小滑移距走滑断裂的几何学特征及成因机制认识,利用最新三维地震与井资料,详细解剖顺南地区18号走滑断裂带构造特征,讨论成因机制.该断裂带纵横比1∶10,且中间长、上下短;在平面上发育双重构造、马尾扇、左阶与右阶雁列等构造样式,在剖面上发育花状、地堑等构造样式;断层性质各异,断距差异大,断层间以软连接为主,硬连接次之;断裂带在不同构造层的分段特征具有继承性与差异性,在平面的不同位置纵向构造样式组合差异大.受先存断裂、地层能干性差异、多期次不同走滑活动的影响,断裂带在早寒武世末期已初步形成,在晚奥陶世早期与末期分别发生右行、左行走滑活动,此期间南部与北部的活动强度较弱,对应的马尾扇、走滑双重构造逐渐定型,中部走滑活动较强,且在上奥陶统能干性频繁变化处发育似花状构造;志留世末-早石炭世前在断裂带北部发生较强的左行走滑活动,促进断层的侧向硬连接,晚石炭世末期在断裂带中部发生较弱的右行走滑活动,促进似花状构造的继续发育,且此2次走滑活动在能干性相对较弱的碎屑岩地层形成雁列.

       

    • 图  1  研究区构造位置与目的层柱状图

      Fig.  1.  The location of Shunnan area and its synthesized lithological column of the target layers in Tarim basin

      图  2  顺南地区断层的识别

      Fig.  2.  The identification of faults in the Shunnan area

      图  3  18号断裂带的剖面几何学特征及剖面线条

      剖面位置见图 1

      Fig.  3.  The geometric features and its line-drawing of seismic profiles for the No.18 strike-slip faults

      图  4  不同地层18号走滑断裂带相干图及平面的断层图

      ①~③分别沿Є1、Є2、O3q底界上漂50 ms,下漂30 ms的相干图; ④沿C底界上、下各漂100 ms的相干图; ⑤沿C内砂泥岩底界向下漂50 ms的相干图; ⑥~⑩分别为Є1、Є2、O3q、C、C内砂泥岩底的断层平面组合与相干叠合图; ⑪~⑮分别为Є1、Є2、O3q、C、C内砂泥岩底的断层平面解释结果

      Fig.  4.  The coherent and distribution of the No.18 strike-slip faults on the different stratigraphic contacts

      图  5  志留系内断层平面与剖面特征

      Fig.  5.  The cross-section and map-view of faults in Silurian in Shunnan area

      图  6  顺南地区18号断裂带附近上奥陶统底界等T0图

      Fig.  6.  The time-domain map at base of the Upper Ordovician near the No.18 strike-slip faults in Shunnan area

      图  7  上奥陶统底界的最大垂直断距与褶皱落差随测线变化统计图(a)和垂直断距与落差测量示例(b)

      测线位置见图 6

      Fig.  7.  The statistic graph of maxmuim vertical fault throw of single fault and vertical displacement of the Upper Ordovician bottom(a), the measurement example of vertical fault throw and vertical displacement(b)

      图  8  上奥陶统底垂直18号走滑断裂带走向的地震剖面

      剖面位置见图 6

      Fig.  8.  The seismic profiles of the No.18 strike-slip faults from SW to NE at the base of the Upper Ordovician

      图  9  18号走滑断裂带垂向断层之间的连接方式

      Fig.  9.  The linkage types of the No.18 strike-slip faults on seismic profile

      图  10  18号走滑断裂带南部AA'剖面中断层垂直断距与断层之间褶皱幅度

      Fig.  10.  The vertical fault throw and fold amplitude in the south of the No.18 strike-slip faults in AA' seismic profile

      图  11  18号走滑断裂带地震剖面(HH'JJ'KK')与下寒武统底界相干图

      Fig.  11.  The seismic profiles (HH'JJ'、KK') and coherent map on the base of the Lower Cambrian of the No.18 strike-slip faults

      图  12  上奥陶统底界18号断裂带平面图与走滑双重构造内FF'GG'剖面断层特征

      a.断裂带走滑双重构造与走滑扇平面模式图; b.上奥陶统底界18号走滑断裂带相干图; c.上奥陶统底界18号断裂带断层解释平面图; d.走滑双重构造内FF'、GG'剖面上奥陶统底界(O3q) 断层特征

      Fig.  12.  The map of the No.18 strike-slip faults and fault feature of the Upper Ordovician bottom on FF', GG' seismic profiles in strike-slip duplex structure

      图  13  研究区及其周缘不同时期的应力方向分布

      Fig.  13.  The map of stress direction distribution at different periods in the study area and its periphery

      图  14  上奥陶统底界18号走滑断裂带平面演化与CC'剖面演化

      Fig.  14.  The evolution of the Upper Ordovician bottom and vertical evolution of the No.18 strike-slip faults

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    • 收稿日期:  2022-07-24
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