地质学报2017，Vol.91Issue(1)：249-265,17.
阴山西段河流阶地发育的年代序列及其对构造隆升的指示意义
Chronology Sequence of the River Terraces Development in Western Yinshan Mountains, China: Implications for the Tectonic Uplifting
摘要
Abstract
Located at the northern part of the Hetao fault basin,Yinshan Mountains had uplift and Hetao basin subsided intermittenty since late Cenozoic.As an important geomorphology response to the tectonic,the river terraces developed well in this area.Based on a detailed field geological survey and the optically stimulated luminescence (OSL) dating,we designated 4～5 fluvial terraces in the transverse drainage of the western Yinshan mountains,and the terraces T4 through T1 experienced four intermittent aggradation stages during the periods of approximately 79.65～58.00,51.61～46.25,41.28～32.19,and 23.22～15.79 ka BP respectively,and incision stages during the periods of 58.00～51.61,46.25～41.28,32.19～23.22,and 15.79 ka BP～ the present,respectively.We also discussed the mechanism of the river terraces,which formed by the combined actions of climatic shifts and tectonic uplift.Tectonic uplift was a driving force for river downcutting,and the climate change was an important fact or influencing the aggradation of the terraces.And we analysed the uplift mode by the river incision rates:the Yinshan Mountains uplift higher in the middle section than the eastern and western section during the period of 58.00～41.28 ka BP,and after about 32.19 ka BP,the western Yinshan tended to up lifte overall with uplift difference decroased.关键词
阴山西段/构造隆升/河流阶地/年代学/新构造Key words
Yin Mountains/tectonic uplift/river terrace/chronology/neotectonics引用本文复制引用
贾丽云,王振,张绪教,叶培盛,何泽新,孟静,何祥丽,叶梦旎,周青硕,李杰..阴山西段河流阶地发育的年代序列及其对构造隆升的指示意义[J].地质学报,2017,91(1):249-265,17.基金项目
中国地质调查局项目(编号:12120114042101)资助的成果. （编号:12120114042101）
