Typical geochemical elements in loess deposit in the northeastern Tibetan Plateau and its paleoclimatic implication

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	Typical geochemical elements in loess deposit in the northeastern Tibetan Plateau and its paleoclimatic implication
	Tan, HB ; Ma, HZ ; Zhang, XY; Lu, HY ; Wang, JG
	2006
发表期刊	ACTA GEOLOGICA SINICA-ENGLISH EDITION
卷号	80 期号:1 页码:110-116
关键词	Northeastern Tibetan Plateau Loess Aleosol Geochemical Elements Paleoclimate
摘要	Widespread and thick loess deposit in the northeastern Tibetan Plateau records paleoclimatic changes over the Quaternary period. In this study, we investigate a loess section located in a high terrace of the Huangshui River in the Xining Basin, and collect samples at 20-cm intervals by digging a well of 16-m depth (including paleosol S1 and S0 and several loess interlayers over the last glacial-interglacial cycle and the Holocene). Concentration of some active elements (Sr and Ca) and inert elements (Rb, Zr, Ti) in these loess samples are measured. The results show that ratios of those elements (oxide), such as Rb/Sr, Ti/Sr, and Zr/CaO ratios, would indicate sensitively paleoclimatic changes, especially the history of precipitation over the last glacial-interglacial and the Holocene. Moreover, the curves of Rb/Sr, Ti/Sr, and Zr/CaO ratios had almost the same variable trends from the bottom to the top and also closely correlated with values of magnetic susceptibility and the global marine delta O-18 record. But compared with the curves of magnetic susceptibility, the changes of ratios of these elements (oxide) are clearer and easy to understand. Therefore, the ratios of these typical chemical elements in the loess deposit may be used as an excellent index to investigate the history of paleoclimate, particularly precipitation changes in the northeastern Tibetan Plateau.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/5767
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.Chinese Acad Sci, Inst Salt Lakes, Xining 810008, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, Xian 710075, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Tan, HB,Ma, HZ,Zhang, XY,et al. Typical geochemical elements in loess deposit in the northeastern Tibetan Plateau and its paleoclimatic implication[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2006,80(1):110-116.
APA	Tan, HB,Ma, HZ,Zhang, XY,Lu, HY,&Wang, JG.(2006).Typical geochemical elements in loess deposit in the northeastern Tibetan Plateau and its paleoclimatic implication.ACTA GEOLOGICA SINICA-ENGLISH EDITION,80(1),110-116.
MLA	Tan, HB,et al."Typical geochemical elements in loess deposit in the northeastern Tibetan Plateau and its paleoclimatic implication".ACTA GEOLOGICA SINICA-ENGLISH EDITION 80.1(2006):110-116.