Optically stimulated luminescence dating of sediments from the Yellow River terraces in Lanzhou: Tectonic and climatic implications

被引:32
作者
Wang, Ping [1 ]
Jiang, Hanchao [1 ]
Yuan, Daoyang [2 ]
Liu, Xingwang [2 ]
Zhang, Bin [1 ,3 ]
机构
[1] China Earthquake Adm, Inst Geol, State Key Lab Earthquake Dynam, Beijing 100029, Peoples R China
[2] China Earthquake Adm, Lanzhou Inst Seismol, Lanzhou 730000, Peoples R China
[3] China Univ Geosci, Sch Earth Sci & Mineral Resources, Beijing 100083, Peoples R China
基金
中国国家自然科学基金;
关键词
Yellow River terrace; OSL dating; Tibetan Plateau; Tectonic movement; Climatic change; CHINESE LOESS PLATEAU; CHRONOLOGY; INCISION; DEPOSITS; EUROPE; UPLIFT; RATES;
D O I
10.1016/j.quageo.2009.05.009
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
The stratigraphic chronology of Yellow River terraces was investigated and studied in Lanzhou Basin, western Chinese Loess Plateau. The optically stimulated luminescence (OSL) dating results show that terraces T(1), T(2) and T(3) formed at 8 ka, 20 ka and 70 ka, respectively. Lateral accretion of the riverbed facies gravel sediments occurred during interglacial periods while vertical aggradations of the terrace sediments deposited predominantly under cold and dry glacial period. A thick layer of aeolian loess with a basal age about 35 ka indicates a remarkable drop of air temperature and a dry, cold climate. The temporal correlation between terrace formation and tectonic movement has not yet been established in this research, but the stratigraphic chronology of the terrace sections provides the timing of the terrace formation, the incision rate of the Yellow River, and the slip rate of the fault horizon. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:181 / 186
页数:6
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