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

作　　者：李洪梁[1,2] 黄海 张勇[2,3] 田尤 陈龙[2,3,4] 张佳佳 李元灵 高波[2,3] 杨东旭 王灵[6] LI Hongliang;HUANG Hai;ZHANG Yong;TIAN You;CHEN Long;ZHANG Jiajia;LI Yuanling;GAO Bo;YANG Dongxu;WANG Ling(Civil-Military Integration Center of China Geological Survey,Chengdu 610036,China;Institute of Prospecting Technology,Chinese Academy of Geological Sciences,Chengdu 611734,China;Technology Innovation Center for Risk Prevention and Mitigation of Geohazard,Ministry of Natural Resources,Chengdu 611734,China;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China;No.208 Geological Team,Bureau of Geological and Mineral Exploration and Development,Chongqing 401121,China)

机构地区：[1]中国地质调查局军民融合地质调查中心,四川成都610036 [2]中国地质科学院探矿工艺研究所,四川成都611734 [3]自然资源部地质灾害风险防控工程技术创新中心,四川成都611734 [4]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [5]成都理工大学地球科学学院,四川成都610059 [6]重庆市地质矿产勘查开发局208地质队,重庆401121

出　　处：《沉积与特提斯地质》2024年第3期493-509,共17页Sedimentary Geology and Tethyan Geology

基　　金：中国地质调查局项目(DD20240386,DD20240014);第二次青藏高原综合科学考察研究(2019QZKK0902)。

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。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.

关 键 词：地质成因模式 红层滑坡 北澜沧江结合带 构造面 藏东昌都红层 

分 类 号：P642.22[天文地球—工程地质学] P694[天文地球—地质矿产勘探]