Loess in the Tian Shan and its implications for the development of the Gurbantunggut Desert and drying of northern Xinjiang

doi:10.1360/02tb9305

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（1985-2004）

	Loess in the Tian Shan and its implications for the development of the Gurbantunggut Desert and drying of northern Xinjiang
	Fang, XM; Shi, ZT; Yang, SL; Yan, MD; Li, JJ; Jiang, PA
	2002-08
发表期刊	CHINESE SCIENCE BULLETIN
卷号	47 期号:16 页码:1381-1387
文章类型	Article
摘要	Eolian loess is widely distributed on the various geomorphic surfaces between 700-2400 m a.s.l. on the northern slope of the Tian Shan. It is formed in a synchronous manner with dust transported from the Gurbantunggut Desert in the Junggar Basin. The thickest section of loess was found in the Shawan and Shihezi regions. Paleomagnetic and climatic proxy analyses of over 71 m of a loess-paleosol sequence on the highest terrace of the Qingshui He (River) in the Shawan show that the paleomagnetic Bruhues/Matuyama (B/M) boundary lies at the bottom of paleosol S8, at a depth of 69.5 m, and the bottom of the sequence was estimated to be similar to0.8 Ma. This implies that the extremely dry climatic conditions in the Junggar Basin and the initial Gurbantunggut Desert were present at least by 0.8 Ma. High-resolution grain size series demonstrate that this area and desert expansion experienced two dramatic periods of desert expansions that occurred at similar to0.65 Ma and 0.5 Ma, respectively; and the subsequent continuous enhancement led to the environment presently observed. This tremendous environmental effect, caused by large-scale expansion of the desert and and region of inner Asia, might be an important driving force for the global temperature drop that occurred in the mid-Pleistocene.
关键词	Tian shan loess gurbantunggut desert aridification global change
学科领域	Science & Technology - Other Topics
DOI	10.1360/02tb9305
关键词[WOS]	ATMOSPHERIC CIRCULATION ; MAGNETOSTRATIGRAPHY ; PLATEAU ; AGE
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Multidisciplinary Sciences
WOS记录号	WOS:000177548600013
出版者	SCIENCE CHINA PRESS
引用统计	被引频次：121[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/11892
专题	黄土与第四纪地质国家重点实验室（1985-2004）
推荐引用方式 GB/T 7714	Fang, XM,Shi, ZT,Yang, SL,et al. Loess in the Tian Shan and its implications for the development of the Gurbantunggut Desert and drying of northern Xinjiang[J]. CHINESE SCIENCE BULLETIN,2002,47(16):1381-1387.
APA	Fang, XM,Shi, ZT,Yang, SL,Yan, MD,Li, JJ,&Jiang, PA.(2002).Loess in the Tian Shan and its implications for the development of the Gurbantunggut Desert and drying of northern Xinjiang.CHINESE SCIENCE BULLETIN,47(16),1381-1387.
MLA	Fang, XM,et al."Loess in the Tian Shan and its implications for the development of the Gurbantunggut Desert and drying of northern Xinjiang".CHINESE SCIENCE BULLETIN 47.16(2002):1381-1387.