黄河中游水系河流阶地序列与数值年代  

SEQUENCES AND AGES OF RIVER TERRACES IN THE MIDDLE REACHES OF THE YELLOW RIVER

作　　者：史兴民[1] 何大周[1] 郭晓鸽[1] 

机构地区：[1]陕西师范大学旅游与环境学院,西安710062

出　　处：《海洋地质前沿》2012年第1期1-7,29,共8页Marine Geology Frontiers

基　　金：国家自然科学基金(40801008)

摘　　要：根据黄河中游水系河流阶地的年代资料,通过对比各种测年结果,获得一个具有较准确数值年代的黄河中游的阶地序列。黄河中游水系河流阶地可分为黄河干流阶地(即兰州段、晋陕峡谷段、禹门口至河南孟津段黄河阶地)、黄河一级支流阶地(渭河和汾河阶地)、黄河二级河流阶地(泾河和洛河阶地)。建立一个准确的阶地序列和数值年代框架,需要多种测年技术的相互印证以及加强河流上下游阶地对比研究。总体来讲,兰州段黄河阶地的年代可靠度比较高,而晋陕峡谷段的河流阶地年代仍有很多争议;渭河的下游阶地年代相对较可靠,但渭河上游、汾河、泾河、洛河的阶地年代研究还需要加强。Based on the large amount of existing data, we worked out a uniform sequence with more accurate age for the terraces along the middle reaches of the Yellow River through comparison of the dating methods, the position of the dating samples and other factors. The drainage system of the mid- dle reaches of the Yellow River can be divided into seven parts, i. e the Yellow River in Lanzhou, the Yellow River in Jin-Shaan gorge, the Yellow River in Yumenkou to Mengjin of Henan, the Weihe river, the Jinghe river, and the Luohe river. In order to establish the sequence and its chronological framework, we tried a variety of dating techniques in addition to the correlation of the terraces up- stream and downstream. The age data of the Yellow River terraces in Lanzhou and along the lower reaches of Weihe River are relatively reliable, but those in the Jin-shaan gorge remain controversah Further study is required as to the ages at the upstream terraces of the Wei River, Fen River, Jing River and Luo River.

关 键 词：黄河中游 河流阶地 阶地序列 阶地年代 

分 类 号：P931.1[天文地球—自然地理学]