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滇西怒江河谷潞江段泥石流灾害时空发育特征
引用本文:杨艳,张绪教,叶培盛,高万里.滇西怒江河谷潞江段泥石流灾害时空发育特征[J].中国区域地质,2012(2):343-350.
作者姓名:杨艳  张绪教  叶培盛  高万里
作者单位:[1]中国地质大学地球科学与资源学院,北京100083 [2]中国地质科学院地质力学研究所,北京100081
基金项目:中国地质调查局项目《泛亚铁路大理至瑞丽沿线地质构造综合研究》(编号:1212010814054)和《云南1:5万马厂幅、道街坝幅区域地质调查》(编号:1212010784004)
摘    要:通过对怒江河谷潞江段21条泥石流重点沟道堆积物的沉积特征、形成基本条件的野外调查,结合室内泥石流沟汇水面积、纵比降的数理统计,运用光释光(OSL)测年技术对洪积物的年龄进行测定,揭示了研究区泥石流的发育具有明显的区域性和分期性。结果表明以潞江为界,泥石流从西岸向东岸迁移;东岸泥石流的发育存在南北差异,具有从北向南发展的趋势而且期次明显,两岸泥石流发育分为3期。

关 键 词:泥石流  地质灾害  怒江  潞江  光释光(OSL)

Temporal-spatial development characteristics of the mud-rock flow in Lujiang segment of Nujiang River valley,western Yunnan Province
YANG Yan,ZHANG Xu-jiao,YE Pei-sheng,GAO Wan-li.Temporal-spatial development characteristics of the mud-rock flow in Lujiang segment of Nujiang River valley,western Yunnan Province[J].Regional Geology of China,2012(2):343-350.
Authors:YANG Yan  ZHANG Xu-jiao  YE Pei-sheng  GAO Wan-li
Institution:1.Faculty of Earth Science and Resources,China University of Geosciences,Beijing 100083,China; 2.Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China
Abstract:Based on field investigation of the depositional sedimentary characteristics of mud-rock flow deposits in 21 key trenches and their basic formation conditions in the Lujiang River(a segment of the Nujiang River),in combination with the indoor mathematical statistics of the mud-rock flow ditch catchment area and the vertical gradient,the authors used OSL to measure the age of the diluvium.The authors hold that the development of the mud-rock flow has obvious regional and periodic characteristics.The results obtained indicate that,with the Lujiang River as the boundary,the mud-rock flow migrated from the west bank to the east bank,the east bank mud-rock flow grew differently in the north and in the south,and tended to develop from north to south with obvious phases,and the growth of the mud-rock flow can be divided into three phases.
Keywords:debris flow geological disaster Nujiang River Lujiang River optically stimulated luminescence(OSL)
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