Evidences of rapid erosion driven by climate in the Yarlung Zangbo (Tsangpo) Great Canyon,the eastern Himalayan syntaxis

作     者：YU XiangJiang JI JianQing GONG JunFeng SUN DongXia QING JianChun WANG LiNing ZHONG DaLai ZHANG ZhiCheng 

作者机构：Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space Sciences Peking University Beijing 100871 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2011年第56卷第11期

页      面：1123-1130页

核心收录：

学科分类：070904[理学-构造地质学] 0709[理学-地质学] 07[理学] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(40872149 and 40472100) the National Natural Science Funds for Distinguished Young Scholar(41002067) 

主　　题：东喜马拉雅构造结 雅鲁藏布江大峡谷 雅鲁藏布大峡谷 侵蚀速率 气候 证据 年平均降水量 冷却年龄 

摘      要：Climate and tectonism are both particularly intense in the Yarlung Zangbo (Tsangpo) Great Canyon in the eastern Himalayan syntaxis,which is characterized by the most rapid landscape evolution of anywhere in the ***,the eastern Himalayan syntaxis is one of the best locations to study the interactions between climate and *** paper investigates the cooling ages of the Doxong La-Baibung profile using apatite fission track (AFT) dating on 11 bedrock samples at elevations ranging from 4210 to 710 *** are topographic,climatic,metamorphic,and thermochronological gradients in the profile,providing good conditions to study interactions between climate and *** ages ranged from 4.6±0.6 Ma to 1.7±0.3 Ma,and the mean fission track lengths ranged from 11.0 to 12.4 μ*** was found that the cooling rates revealed by AFT ages increased with decreasing ***,the tendency of the cooling rates revealed by the 40 Ar-39 Ar ages was different from that indicated by the AFT ***,for most districts of the eastern Himalayan syntaxis,the compiled AFT age distribution correlates well with the annual average precipitation,indicating the coupling of the cooling and erosion rates of the near-surface rock and *** geothermal history modeling results indicate an obvious increase in the cooling and erosion rate between 1.0 and 0.5 *** age is consistent with other research findings for this time,when the vapor channel of the Yarlung Zangbo Great Canyon began to take *** evidences suggest that climate,especially precipitation,has acting as a key factor influencing the rapid cooling and erosion in the Yarlung Zangbo Great Canyon since 1-0.5 Ma.