Origin of the Red Earth sequence on the northeastern Tibetan Plateau and its implications for regional aridity since the middle Miocene

doi:10.1007/s11430-006-0505-3

	Origin of the Red Earth sequence on the northeastern Tibetan Plateau and its implications for regional aridity since the middle Miocene
	Wang, XY ; Lu, HY ; Ji, JF ; Wang, XY ; Zhao, J ; Huang, BC ; Li, Z
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2006-05-01
卷号	49 期号:5 页码:505-517
关键词	Red Earth deposit Northeastern Tibetan Plateau aeolian deposit aridity of Asia the middle Miocene
ISSN号	1006-9313
DOI	10.1007/s11430-006-0505-3
文献子类	Article
英文摘要	The Red Earth deposit around Xining, northeastern Tibetan Plateau, has been studied in terms of soil micro-structure, grain-size distribution, major- and trace-element chemistry and magnetostratigraphy. Field investigations indicate that the Red Earth sequence consists of 25 visually definable yellow-brown and weakly-developed soils interbedded with reddish strongly-developed soils, and has a similar structure to the aeolian Red Clay deposit on the Chinese Loess Plateau. Grain-size analysis shows that the Red Earth deposit is very fine-grained with a negligible sand fraction (>63 mu m). Thin-section observations under light microscopy show that the deposit has a clayey texture and the coarse fraction (>10 mu m) mainly consists of quartz, feldspar and micas. Pyroxene and hornblende were also observed. This mineralogical composition of the coarse fraction is similar to that of the Quaternary loess. In addition, all of the mineral grains are semi angular semi-angular and are generally finer than 63 mu m. There is a good agreement between the major and minor trace element chemistry of loess-soil units and the Red Earth deposit. The REE distributions of the loess-soil and the Red Earth deposit are similar in shape, with enriched LREE and fairly flat HREE profiles and a clear negative Eu anomaly. The geochemical characteristics of the Red Earth deposit are also identical to those of upper continental crust, thus indicating a wind-blown origin.
WOS关键词	CHINESE LOESS PLATEAU ; HIMALAYAN FORELAND BASIN ; EAST-ASIAN MONSOON ; NORTHERN CHINA ; GRAIN-SIZE ; PALEOCLIMATIC IMPLICATIONS ; MAGNETIC-SUSCEPTIBILITY ; PALEOSOL SEQUENCE ; CLAY FORMATION ; PLIOCENE
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000238585200007
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/67088]
专题	中国科学院地质与地球物理研究所
通讯作者	Lu, HY
作者单位	1.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710075, Peoples R China 2.Nanjing Univ, Dept Urban & Resources Sci, Nanjing 210093, Peoples R China 3.Nanjing Univ, Dept Earth Sci, Nanjing 210093, Peoples R China 4.Shaanxi Normal Univ, Dept Geog, Xian 710062, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 6.Qinghai Normal Univ, Dept Geog, Xining 810008, Peoples R China 7.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Wang, XY,Lu, HY,Ji, JF,et al. Origin of the Red Earth sequence on the northeastern Tibetan Plateau and its implications for regional aridity since the middle Miocene[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49(5):505-517.
APA	Wang, XY.,Lu, HY.,Ji, JF.,Wang, XY.,Zhao, J.,...&Li, Z.(2006).Origin of the Red Earth sequence on the northeastern Tibetan Plateau and its implications for regional aridity since the middle Miocene.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,49(5),505-517.
MLA	Wang, XY,et al."Origin of the Red Earth sequence on the northeastern Tibetan Plateau and its implications for regional aridity since the middle Miocene".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 49.5(2006):505-517.