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    李洪梁,黄海,张勇,等,2024. 藏东昌都红层滑坡的地质成因模式[J]. 沉积与特提斯地质,44(3):493−509. DOI: 10.19826/j.cnki.1009-3850.2024.07002
    引用本文: 李洪梁,黄海,张勇,等,2024. 藏东昌都红层滑坡的地质成因模式[J]. 沉积与特提斯地质,44(3):493−509. DOI: 10.19826/j.cnki.1009-3850.2024.07002
    LI H L,HUANG H,ZHANG Y,et al.,2024. Geological genesis model of red strata landslide in Qamdo, eastern Xizang[J]. Sedimentary Geology and Tethyan Geology,44(3):493−509. DOI: 10.19826/j.cnki.1009-3850.2024.07002
    Citation: LI H L,HUANG H,ZHANG Y,et al.,2024. Geological genesis model of red strata landslide in Qamdo, eastern Xizang[J]. Sedimentary Geology and Tethyan Geology,44(3):493−509. DOI: 10.19826/j.cnki.1009-3850.2024.07002

    藏东昌都红层滑坡的地质成因模式

    Geological genesis model of red strata landslide in Qamdo, eastern Xizang

    • 摘要: 藏东昌都红层紧邻北澜沧江结合带(LCS),是近年来新厘定的红层岩系。为进一步丰富和完善红层及滑坡灾害研究,文章基于翔实的现场调查,从构造地质学角度约束滑坡发育的边界条件,总结归纳了藏东昌都红层滑坡的地质成因模式,并对不同类型滑坡典型案例进行了剖析。结果表明:受区域造山作用影响,藏东昌都红层掀斜,发育大量透入性构造面,导致岩体物理力学性能弱化。藏东昌都红层滑坡的地质成因模式主要包括原生层理型、层理断层型、层理节理型、褶皱节理型和断层节理型等5类。构造面是红层滑坡发育的主控因素,建议在明确研究区构造演化过程及构造框架的基础上,精细刻画滑坡区构造面发育特征。研究成果可为揭示滑坡发育的内在机制及监测预警、工程防治等提供理论支撑。

       

      Abstract: The Qamdo red strata in eastern Xizang is adjacent to the north Lancang River suture zone (LCS). It is a newly defined red strata series in recent years. In order to further enrich and improve research on red strata and landslides, based on detailed field investigations, this paper summarizes the geological genesis models of red strata landslides in Qamdo, eastern Xizang, from the perspective of structural geology restricting the boundary conditions of landslide development, and briefly analyzes typical cases of different types of landslides. The results show that, under the influence of regional orogeny, the Qamdo red strata in eastern Xizang were tilted and developed a large amount of penetrating structural planes with weak physical and mechanical properties. The geological genesis models of red strata landslides in Qamdo, eastern Xizang mainly include five types: primary bedding type, bedding fault type, bedding joint type, fold joint type, and fault joint type. The structural plane is the main controlling factor of the development of red strata landslides. It is suggested that, based on clarifying the tectonic evolution process and tectonic framework of the study area, the development characteristics of the structural plane in the landslide area should be meticulously delineated, to provide theoretical support for revealing the internal mechanism of landslide development, monitoring, and engineering prevention.

       

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