Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Glaciology and Geocryology》 2007-04
Add to Favorite Get Latest Update

River Terraces in the Shuoqu River and Their Response to Mountain Uplift and Climate Changes in Western Sichuan Province

XU Liu-bing,ZHOU Shang-zhe(Department of Geography,South China Normal University,Guangzhou Guangdong 510631,China)  
Tectonic uplift and climate change are two key factors controlling the river terrace formation in hinterlands.Rivers in different areas,however,respond to the two drivers in different ways.There are six river terraces on both sides of the Yajin Section of Shuo Qu,which are located in the tectonically active area in western Sichuan Province and are climatically controlled by the south Asian monsoon.Electron spin resonance(ESR) and thermoluminescence(TL) techniques were used to date the sediments from the five higher terraces(T2~T6) and the glacial sediments adjacent to the terraces.The evolution processes of the five terraces are analyzed on the basis of the dating results and the geomorphological and sedimentological characteristics of the terraces.It is revealed that the straths of the terraces (T2~T6) formed during the glacial-interglacial transitions.The sediments on the straths deposited during glacial periods.The incisions for forming these terraces began at the late glacial period,corresponding to the late periods of marine isotope stages 2,6,8,14,and 16,respectively.The incision ratio of the Yajin Section of the Shuo Qu was ~1.22 mm·a-1 since the late marine isotope stage 16,less than the uplifting ratio of 2 mm·a-1 in this region,which is consistent with the previous conclusions that incision ratio was no more than uplifting ratio.
【Fund】: 国家自然科学基金项目(40601012)资助
【CateGory Index】: P534.63
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved