临夏盆地巴谢河流域典型滑坡多期次活动年代学证据  

Chronological evidence for multi-phase activity of a typical landslide in Baxie River catchment,the Linxia Basin,Northwest China

作　　者：李昂[1] 侯圣山[1] 王立朝[1] 陈亮[1] 李祥龙[1] 连建发[1] 付东林 何强[3] 金文祥 LI Ang;HOU Shengshan;WANG Lichao;CHEN Liang;LI Xianglong;LIAN Jianfa;FU Donglin;HE Qiang;JIN Wenxiang(China Institute of Geo-Environment Monitoring, Beifing 100081, China;Gansu Institute of Geo-Environment Monitoring, Lanzhou, Gansu 730050, China;Chengdu University of Technology, Chengdu, Sichuan 610059, China)

机构地区：[1]中国地质环境监测院,北京100081 [2]甘肃省地质环境监测院,甘肃兰州730050 [3]成都理工大学,四川成都610059

出　　处：《中国地质灾害与防治学报》2018年第2期61-65,共5页The Chinese Journal of Geological Hazard and Control

基　　金：中国地质调查局地质矿产调查评价项目:洮河流域下游地质灾害调查(DD20160280)

摘　　要：本文以黄土高原临夏盆地巴谢河流域的上正滑坡为例,采用14C同位素年代学方法,结合文献查阅和实地走访,建立了该滑坡的多期次滑动的年代学框架。研究显示,上正滑坡至少经历了3个期次的活动:约33 ka B.P.,5~7 ka B.P.和距今约160年。这一年龄框架与此滑坡的变形破坏特征和成因机理相结合,对认识滑坡的发展演化规律有着重要的意义。这一地区普遍存在的滑坡多期次的活动,能够对这一区域的地质构造和气候演化提供科学数据,对黄土-泥岩滑坡的成因机理和演化规律加深科学认识,并能对现今的地质灾害防治措施提供借鉴。Shangzheng landslide locates in the Baxie River catchment in Linxia Basin, northwest Loess Plateau. It is a typical mudstone-loess landslide, representing an ideal research target toward the characteristics and laws of such landslides. Radiocarbon dating technique was applied in this research to establish the chronological framework for the multistage sliding of the landslide. Samples indicating the ages of the sliding processes are collected through detailed field survey and borehole drilling. The results show that Shangzheng landslide have undergone at least three main sliding processes： about 33 ka B. P.,5 ~ 7 ka B. P.and about 160 years ago. These ages provide evidences to the past changes,and can be used to deepen the reorganization of the landslide activities in the geological times.

关 键 词：滑坡 ^14C测年技术 多期次活动 成因机理 

分 类 号：P642.22[天文地球—工程地质学]