Implication of boron isotope geochemistry for the pedogenic environments in loess and paleosol sequences of central China

ISL OpenIR > 青海盐湖研究所知识仓储

	Implication of boron isotope geochemistry for the pedogenic environments in loess and paleosol sequences of central China
	Wei, Hai-Zhen 1; Lei, Fang 2; Jiang, Shao-Yong 1,3; Lu, Hua-Yu 2; Xiao, Ying-Kai 4; Zhang, Han-Zhi 2; Sun, Xue-Feng 2
	2015
发表期刊	QUATERNARY RESEARCH
卷号	83 期号:1 页码:243-255
关键词	Boron Isotopic Composition Loess-paleosol Sequences Pedogenesis Environment Loess Plateau China
摘要	We investigated the boron isotopic composition in loess-paleosol sequences in five different profiles in the Chinese Loess Plateau. Three possible boron sources are identified: atmospheric input, carbonates, and weathered silicate rocks. Variations of [Sr], [B], delta B-11 and the magnetic susceptibility correlate well with the pedogenetic intensity in three out of the five studied profiles, where pedogenesis under a cold-dry climate indicates lower delta B-11, lower [B], lower magnetic susceptibility and higher [Sr] values. Exceptions to the variations between the delta B-11 and other known proxies were observed in arenaceous soils and the Red Clay sequence: the former suggested that vertical redistribution probably occurred with the boron migration, and the latter indicated an unknown mechanism of susceptibility enhancement. A better correlation between the delta B-11 and magnetic susceptibility and the quantitative estimation of boron budget from each source confirms the influence of paleoenvironmental changes on boron geochemical cycle. Significant positive correlations in Sr/Ca vs. B/Ca and Mg/Ca vs. B/Ca reflect consistent enrichment behavior of those mobile elements into calcium carbonate. The preliminary results imply that boron isotopic compositions in soils can be a potential geochemical proxy to reconstruct the paleoenvironmental changes in loess-paleosol sequences. (C) 2014 University of Washington. Published by Elsevier Inc. All rights reserved.
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/363002/5744
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.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210093, Jiangsu, Peoples R China 2.Nanjing Univ, Sch Geog & Oceanog Sci, Jiangsu Collaborat Innovat Ctr Climate Change, Nanjing 210093, Jiangsu, Peoples R China 3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Fac Earth Resources, Wuhan 430074, Peoples R China 4.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810003, Peoples R China
推荐引用方式 GB/T 7714	Wei, Hai-Zhen,Lei, Fang,Jiang, Shao-Yong,et al. Implication of boron isotope geochemistry for the pedogenic environments in loess and paleosol sequences of central China[J]. QUATERNARY RESEARCH,2015,83(1):243-255.
APA	Wei, Hai-Zhen.,Lei, Fang.,Jiang, Shao-Yong.,Lu, Hua-Yu.,Xiao, Ying-Kai.,...&Sun, Xue-Feng.(2015).Implication of boron isotope geochemistry for the pedogenic environments in loess and paleosol sequences of central China.QUATERNARY RESEARCH,83(1),243-255.
MLA	Wei, Hai-Zhen,et al."Implication of boron isotope geochemistry for the pedogenic environments in loess and paleosol sequences of central China".QUATERNARY RESEARCH 83.1(2015):243-255.