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Ages and genesis of terrace flights in the middle reaches of the Yarlung Zangbo River, Tibetan Plateau, China

文献类型：期刊论文

作者Zhu, Song1; Wu, Zhenhan2; Zhao, Xitao3; Li, Jianping4; Xiao, Keyan1
刊名BOREAS
出版日期2014-04-01
卷号43期号:2页码:485-504
ISSN号0300-9483
DOI10.1111/bor.12050
文献子类Article
英文摘要Field investigation has shown that the middle reaches of the Yarlung Zangbo River, in Tibet (known as the Bhramaputra River in reaches downstream) has 11 terraces. The ages of these terraces were determined as follows: T-11>2000 ka, T-10 = 1783 ka, T-9 = 1238 ka, T-8 = 683 ka, T-7 = 382 ka, T-6 = 150 ka, T-5 = 82 ka, T-4 = 67 ka, T-3 = 43 ka, T-2 = 28 ka and T-1 = 10 ka. These terraces formed during several stages of the Quaternary when the Tibetan Plateau was uplifting, recording tectonic-climatic cycles or subcycles of 1.2, 0.4, 0.1, 0.04 and 0.02 million years duration. The tectonic-climatic cycles identified by this study are correlated with red soil and palaeosol records. The preservation of the Oligocene to Early Miocene conglomeratic Dazhuka Formation, close to the present altitude of the main planation surface of the Tibetan Plateau and occurring only in the Yarlung Zangbo valley, suggests that this river has existed since at least 7 Ma. Discoveries of old and thick fluvial gravel layers extending to within 630 m of the valley floor show that the Yarlung Zangbo River was already incised by 2000 m or more below the surface of the Tibetan Plateau, that much of the incision from plateau to valley floor had been accomplished and that the plateau was already substantially uplifted prior to the Quaternary. In addition to its importance for understanding the evolution of the Tibetan Plateau, this study documents the impact of varying rates of tectonic uplift on river development.
WOS关键词SOUTHEASTERN TIBET ; TSANGPO RIVER ; FLUVIAL TERRACES ; LATE PLEISTOCENE ; WESTERN CHINA ; UPLIFT ; QUATERNARY ; CALIBRATION ; DEPOSITS ; CLIMATE
WOS研究方向Physical Geography ; Geology
语种英语
WOS记录号WOS:000333455400013
出版者WILEY-BLACKWELL
资助机构China Geological Survey(1212011120185) ; China Geological Survey(1212011120185) ; China Geological Survey(1212011120185) ; China Geological Survey(1212011120185) ; China Geological Survey(1212011120185) ; China Geological Survey(1212011120185) ; China Geological Survey(1212011120185) ; China Geological Survey(1212011120185)
源URL[http://ir.iggcas.ac.cn/handle/132A11/85328]  
专题中国科学院地质与地球物理研究所
通讯作者Zhu, Song
作者单位1.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China
2.Chinese Acad Geol Sci, Beijing 100037, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
4.China Earthquake Adm, Inst Geol, State Key Lab Earthquake Dynam, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Zhu, Song,Wu, Zhenhan,Zhao, Xitao,et al. Ages and genesis of terrace flights in the middle reaches of the Yarlung Zangbo River, Tibetan Plateau, China[J]. BOREAS,2014,43(2):485-504.
APA Zhu, Song,Wu, Zhenhan,Zhao, Xitao,Li, Jianping,&Xiao, Keyan.(2014).Ages and genesis of terrace flights in the middle reaches of the Yarlung Zangbo River, Tibetan Plateau, China.BOREAS,43(2),485-504.
MLA Zhu, Song,et al."Ages and genesis of terrace flights in the middle reaches of the Yarlung Zangbo River, Tibetan Plateau, China".BOREAS 43.2(2014):485-504.

入库方式： OAI收割

来源：地质与地球物理研究所

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