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    马昊, 汪发武, 胡明鉴, 莫洵懿, 付子进, 张耀祖, 尤琪, 曹生喆, 2025. 藏东南八宿县林卡乡高位古滑坡群的孕灾条件与形成机制. 地球科学. doi: 10.3799/dqkx.2025.196
    引用本文: 马昊, 汪发武, 胡明鉴, 莫洵懿, 付子进, 张耀祖, 尤琪, 曹生喆, 2025. 藏东南八宿县林卡乡高位古滑坡群的孕灾条件与形成机制. 地球科学. doi: 10.3799/dqkx.2025.196
    MA Hao, WANG Fawu, HU Mingjian, MO Xunyi, FU Zijin, ZHANG Yaozu, YOU Qi, CAO Shengzhe, 2025. Forming Conditions and Failure Mechanism of Clustered High-Position Ancient Landslides in Linka Township, Basu County, Tibet Autonomous Region, China. Earth Science. doi: 10.3799/dqkx.2025.196
    Citation: MA Hao, WANG Fawu, HU Mingjian, MO Xunyi, FU Zijin, ZHANG Yaozu, YOU Qi, CAO Shengzhe, 2025. Forming Conditions and Failure Mechanism of Clustered High-Position Ancient Landslides in Linka Township, Basu County, Tibet Autonomous Region, China. Earth Science. doi: 10.3799/dqkx.2025.196

    藏东南八宿县林卡乡高位古滑坡群的孕灾条件与形成机制

    doi: 10.3799/dqkx.2025.196
    基金项目: 

    国家自然科学基金重点项目(No. 42230715)

    详细信息
      作者简介:

      马昊(1993-), 男,博士研究生, 主要从事地质灾害机理研究, ORCID: 0000-0001-9685-4809, E-mail: mah@tongji.edu.cn.

      通讯作者:

      汪发武(1965-),男,教授,博士生导师,主要从事地质灾害动力学研究,ORCID: 0000-0002-5912-7095, E-mail: wangfw@tongji.edu.cn.

    • 中图分类号: P642

    Forming Conditions and Failure Mechanism of Clustered High-Position Ancient Landslides in Linka Township, Basu County, Tibet Autonomous Region, China

    • 摘要: 藏东南地处青藏高原东南缘,板块构造活跃、地形起伏剧烈,大型高位古滑坡密集分布。为进一步揭示藏东南大型高位古滑坡的孕灾机制,以八宿县林卡乡为研究区,通过高分辨率遥感影像解译,识别和厘定古滑坡边界,建立林卡乡古滑坡编目数据集;基于GIS空间分析和数据统计,查明林卡乡古滑坡群的空间分布特征与主控孕灾因子;通过现场调查、无人机航拍和地球物理勘探,揭示典型大型高位古滑坡的形成机制。结果表明,八宿县林卡乡境内共发育51处高位古滑坡,其中50处为大型滑坡,古滑坡聚集分布于深切河谷的谷坡之上。岩性和地形起伏度是控制该区域古滑坡分布的关键因素,砂板岩地层和起伏度介于1000~1600 m之间的陡峻地形对古滑坡的发育最有利。对林卡乡孜嘎村附近4处大型高位古滑坡的调查分析表明,其均为弯曲倾倒-拉裂滑移型破坏。由于林卡乡境内砂板岩地层普遍具有中-陡倾的薄-中厚层状结构,为典型的易倾倒岩体,且已探明古滑坡的主滑方向多与区域地层的优势倾向一致或相反,符合弯曲倾倒所致滑坡的典型运动特征,推测岩层长期的弯曲倾倒变形是造成林卡乡古滑坡群聚发育的重要因素,倾倒岩体的拉裂滑移是区域内古滑坡的主要破坏机制。

       

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