[1]陈剑,崔之久,戴福初,等.金沙江奔子栏-达日河段大型泥石流堆积扇的成因机制[J].山地学报,2011,(03):312.
　CHEN Jian,CUI Zhijiu,Dai Fuchu,et al.Genetic Mechanism of the Major Debrisflow Deposits at BenzilanDari Segment, the Upper Jinsha River[J].Mountain Research,2011,(03):312.
点击复制

金沙江奔子栏-达日河段大型泥石流堆积扇的成因机制()
分享到：

《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2011年03期
页码:
312
栏目:
山地学报
出版日期:
2011-01-01

文章信息/Info

Title:
Genetic Mechanism of the Major Debrisflow Deposits at BenzilanDari Segment, the Upper Jinsha River
作者:
陈剑;崔之久;戴福初;许冲;
1.中国地质大学（北京）工程技术学院，北京 100083;
2.北京大学城市与环境学系，北京 100871;
3.中国科学院地质与地球物理研究所青藏高原研究室，北京 100029
Author(s):
CHEN Jian; CUI Zhijiu; Dai Fuchu; XU Chong
1.School of Engineering and Technology, China University of Geosciences, Beijing 100083,China;
2.Urban and Environmental Department, Beijing University, Beijing 100083,China;
3.Division of Tibet Plateau, Institute of Geology and Geophysics, CAS, Beijing 100029,China
关键词:
金沙江; 干热河谷; 泥石流堆积扇; 气候变化
Keywords:
Jinsha River;  dry valley;  debris flow;  southwest monsoon;  climatic change
分类号:
P64223
文献标志码:
A
摘要:
金沙江上游奔子栏-达日河段属横断山区的干热河谷地带,河谷沿岸大型古泥石流堆积扇广泛发育,其成因却一直没有得到很好的研究。对该区瓦卡大型古泥石流堆积物进行了沉积结构、粒度、地球化学和孢粉等分析,揭示了泥石流的沉积环境及其形成过程。通过粗颗粒石英的光释光单片再生法(SAR)测年研究,获得金沙江上游奔子栏-达日河段古泥石流大规模暴发的年代为12 600~4 500 a BP。丰富的风化碎屑物源、陡峻的地形及雨季降水集中是该区古泥石流形成的主要原因。全新世早期青藏高原东南缘受西南季风加强的影响,气候趋于暖湿,季节性暴雨增加。金沙江上游干热河谷区大型泥石流堆积扇的发育年代暗示其是全新世早期西南季风加强作...
Abstract:
The Quaternary debrisflow accumulations can provide rich information for geomorphic evolution, tectonic movement and climate change. There occur many Quaternary debrisflow accumulations in the southeastern (SE) marginal area of the Tibetan Plateau (TP), especially in valleys of the upper reach of the Jinsha River. The river segment between Benzilan to Dari of the upper Jinsha River belongs to the dryhot valley type in the Henduan Mountainous region. Major old debrisflow accumulations are well developed in this area, however their formative causes have not been studied. The Waka debris flows is one of the major debris flows in the river segment and has successive series in the exposed sections. Detailed granularity, pollen, geochemical and textural studies reveal the formation processes of Waka debris flows. The age estimates of optically stimulated luminescence (OSL) using SAR protocol show that the occurrence of major debris flows started at around 12.6 ka BP and weakened until 4.5 ka BP in the upper Jinsha River valley. The rich source of weathered detritus, steep landform and concentrated precipitation are the dominant factors causing the occurrence of debris flows in the area. The seasonal variation of the southwest monsoon circulation over the Tibetan Plateau and its adjacent area results in substantial rainfall during summer in the area. Climate change is thus characterized by the alteration between colddry and warmwet. The most characteristic features of Paleoclimatic records are the sudden establishment of wet conditions around 10.0 ka BP, and maximum aridity around 4~3 a BP. Objected to the strengthening of the southwest monsoon in the SE margin of the Tibetan Plateau in the early Holocene, the climate in the dryhot valley trended to be wetter and the rainfall in the summer seasons might increased. The age estimates of optically stimulated luminescence show that the occurrence of major debris flows corresponded to the obvious strengthened phase of the summer monsoons in the region. The formation characteristics and ages of the debrisflow deposits in the upper Jinsha river indicates that the occurrence of a mass of debris flows were a response to the intensified southwest monsoon in the southeast margin of the Tibetan Plateau since the early Holocene.

相似文献/References:

[1]苏怀,明庆忠,潘保田,等.金沙江河谷-水系发育的年代学框架分析与探讨[J].山地学报,2013,(06):685.
　SU Huai,MING Qingzhong,PAN Baotian,et al.The Analysis and Discussions on the Chronological Frame of Jinshajiang River Valleydrainage[J].Mountain Research,2013,(03):685.
[2]吴宁,乔永康.四川省宁南县干热河谷植物区系[J].山地学报,1994,(01):21.
[3]林伟宏,陈克明,刘照光.川西南干热河谷赤按人工林生物量和营养元素含量[J].山地学报,1994,(04):251.
[4]张建平.元谋干热河谷区降水异常灰色灾变预测[J].山地学报,1995,(01):55.
[5]何毓蓉,黄成敏.云南省元谋干热河谷的土壤系统分类[J].山地学报,1995,(02):73.
[6]黄成敏,何毓蓉.云南省元谋干热河谷的土壤抗旱力评价[J].山地学报,1995,(02):79.
[7]胡卸文,陈明东,刘汉超,等.金沙江向家坝库区崩滑灾害的环境效应[J].山地学报,1996,(03):205.
[8]周麟.云南省元谋干热河谷的第四纪植被演化[J].山地学报,1996,(04):224.
[9]杨忠,王道杰,张信宝,等.元谋干热河谷大翼豆引种栽培试验[J].山地学报,1996,(S1):64.
[10]邓贤贵.金沙江流域水土流失及其防治措施[J].山地学报,1997,(04):277.
[11]张映翠,朱宏业,吴仕荣.金沙江干热河谷土地资源及其开发潜力[J].山地学报,1996,(03):188.
[12]杨忠,张信宝,王道杰,等.金沙江干热河谷植被恢复技术[J].山地学报,1999,(02):57.
[13]柴宗新,范建容.金沙江干热河谷植被恢复的思考[J].山地学报,2001,(04):381.

备注/Memo

备注/Memo:
收稿日期(Received date)：2010-11-15；改回日期(Accepted) : 2011-03-14。
基金项目（Foundation item）：国家自然科学基金青年
基金项目(批准号：40901005)资助。\[Supported by National Natural Science Foundation (40901005) .\]
作者简介（Biography）：陈剑，男 （1975-）副教授，主要从事灾害地貌学、地质灾害预测与防治等方面的科研教学工作。\[Jian Chen, male, (1975-), associate professor. Majored in hazard geomorphology, engineering geology, geological hazard prediction and control.\] E-mail: jianchen@cugb.edu.ac.cn
更新日期/Last Update: 1900-01-01