Effect of chemical pretreatments on magneticsusceptibility of loess from Central Asia and theChinese Loess Plateau

doi:10.1039/C8RA00617B

	Effect of chemical pretreatments on magneticsusceptibility of loess from Central Asia and theChinese Loess Plateau
	Song, YG(Song,Yougui)2,5; Li,Y(Li,Yue)1,2; Wang, QS(Wang,Qiansuo)4; Dong,HM(Dong,Hongmei)3; Zhang, ZP(Zhang, Zhiping)8; Rustam Orozbaev 6,7; Song,Yougui
刊名	RSC Advances
	2018-08
期号	20 页码:11087-11094
DOI	10.1039/C8RA00617B
文献子类	期刊论文
英文摘要	Magnetic susceptibility (MS) as a paleoclimatic proxy plays an important role in paleoenvironmental reconstruction and past global climatic change. In order to discriminate the effect of composition on the MS of Quaternary eolian loess in inland arid Central Asia (CA), a series of comparative chemical experiments were designed to investigate the effects of different components on MS of loess from the Ili Basin CA and Chinese Loess Plateau (CLP). The results indicate that hydrochloric acid (HCl) can not only remove carbonate minerals, but also react with ferrous ions minerals by dissolving fine superparamagnetic particles (SPs), which reduces MS, especially in the CLP samples. Compared to the original samples, MS (χlf) of acetic acid (AA) pretreated samples from CA and CLP increased by 20.3% and 4.8%, respectively, and their frequency-dependent MS (χfd) increased by 53.4% and 13.0%, respectively, which indicates that the effect of carbonates on MS is greater for CA samples than for CLP samples. The variation in MS was below 5% in samples pretreated with perhydrol (H2O2) or distilled water, indicating that organic material and soluble components have very small influences on the MS. Temperature-dependence MS curves indicate that the transformation of magnetic minerals during the cooling of loess from the CLP mainly affected fine particles in the SPs, and that the contents of lepidocrocite and maghemite or goethite in the CA loess are lower than those in the CLP. The loess MS enhancement mechanism in Central Asia differs from that in the CLP.
项目编号	41572162 ; 132B61KYS20160002
语种	英语
资助机构	Natural Science Foundation of China ; Natural Science Foundation of China ; International Partnership Program ; International Partnership Program ; Special Exchange Program for Russia, Ukraine, and Belarus from Chinese Academy of Sciences ; Special Exchange Program for Russia, Ukraine, and Belarus from Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5267]
专题	地球环境研究所_古环境研究室
通讯作者	Song,Yougui
作者单位	1.College of Earth Science, University of Chinese Academy of Sciences, Beijing, 100049,China 2.State Key Laboratory of Loess and Quaternary Geology, Institute of EarthEnvironment, Chinese Academy of Sciences, Xi'an, 710061, China 3.School of Management, Xi'an University of Science and Technology, Xi'an 710054,China 4.College of Resources and Environment, Linyi University, Linyi 276005, Shandong,China 5.Department of Geosciences, Baylor University, Waco, TX 76798, USA 6.Institute of Geology, National Academy of Sciences of Kyrgyz Republic, Bishkek720040, Kyrgyzstan 7.Research Center for Ecology and Environmental of Central Asia (Bishkek), Bishkek,720040, Kyrgyzstan 8.Environmental Monitoring Station of Ili Kazakh Autonomous Prefecture, Yining835000, China
推荐引用方式 GB/T 7714	Song, YG,Li,Y,Wang, QS,et al. Effect of chemical pretreatments on magneticsusceptibility of loess from Central Asia and theChinese Loess Plateau[J]. RSC Advances,2018(20):11087-11094.
APA	Song, YG.,Li,Y.,Wang, QS.,Dong,HM.,Zhang, ZP.,...&Song,Yougui.(2018).Effect of chemical pretreatments on magneticsusceptibility of loess from Central Asia and theChinese Loess Plateau.RSC Advances(20),11087-11094.
MLA	Song, YG,et al."Effect of chemical pretreatments on magneticsusceptibility of loess from Central Asia and theChinese Loess Plateau".RSC Advances .20(2018):11087-11094.