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Effect of chemical pretreatments on magneticsusceptibility of loess from Central Asia and theChinese Loess Plateau
Song, YG(Song,Yougui)1,2; Li,Y(Li,Yue)1,3; Wang, QS(Wang,Qiansuo)4; Dong,HM(Dong,Hongmei)5; Zhang, ZP(Zhang, Zhiping)6; Rustam Orozbaev7,8; Song,Yougui
2018-08
发表期刊RSC Advances
期号20页码:11087-11094
文章类型期刊论文
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.
DOI10.1039/C8RA00617B
收录类别SCI
所属项目编号41572162 ; 132B61KYS20160002
语种英语
项目资助者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
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文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5267
专题古环境研究室
通讯作者Song,Yougui
作者单位1.State Key Laboratory of Loess and Quaternary Geology, Institute of EarthEnvironment, Chinese Academy of Sciences, Xi'an, 710061, China
2.Department of Geosciences, Baylor University, Waco, TX 76798, USA
3.College of Earth Science, University of Chinese Academy of Sciences, Beijing, 100049,China
4.College of Resources and Environment, Linyi University, Linyi 276005, Shandong,China
5.School of Management, Xi'an University of Science and Technology, Xi'an 710054,China
6.Environmental Monitoring Station of Ili Kazakh Autonomous Prefecture, Yining835000, China
7.Institute of Geology, National Academy of Sciences of Kyrgyz Republic, Bishkek720040, Kyrgyzstan
8.Research Center for Ecology and Environmental of Central Asia (Bishkek), Bishkek,720040, Kyrgyzstan
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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.
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