川西高原杂谷脑河阶地的形成
收稿日期: 2005-09-19
修回日期: 2005-12-05
网络出版日期: 2006-03-25
基金资助
国家自然科学基金项目 (40201007)
Formation of the Zagunao River Terraces in Western Sichuan Plateau, China
Received date: 2005-09-19
Revised date: 2005-12-05
Online published: 2006-03-25
Supported by
National Natural Science Foundation of China, No.40201007
刘勇, 赵志军, 李才林, 张茂恒, 陈晔 . 川西高原杂谷脑河阶地的形成[J]. 地理学报, 2006 , 61(3) : 249 -254 . DOI: 10.11821/xb200603003
Our field investigation identified eight river terraces at Zagunao, Lixian county of Western Sichuan Plateau along the Zagunao River, a main tributary of the Minjiang River. Applying ESR dating method, we successively determined ages of T2, T3, T4 and T6, which are 54, 125, 248 and 481 ka BP respectively. The development of the terrace sequences here was prominently under the control of regional tectonic uplift, and they should record phased uplift events of the Western Sichuan Plateau since the middle Pleistocene. The average incision rate of Zagunao River is calculated to be around 0.39 m/ka, which is coincident with the geodesic uplift rate of the Longmen Mountain (0.3-0.4 m/ka).
Key words： Western Sichuan Plateau; Zagunao River; ESR dating; incision rate
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