Effect of chemical pretreatments on magnetic susceptibility of loess from Central Asia and the Chinese Loess Plateau
文献类型：期刊论文
| 作者 | Dong, Hongmei5; Orozbaev, Rustam7,8; Li, Yue1,3; Song, Yougui1,2; Zhang, Zhiping6; Wang, Qiansuo4 |
| 刊名 | RSC ADVANCES
 |
| 出版日期 | 2018 |
| 卷号 | 8期号:20页码:11087-11094 |
| DOI | 10.1039/c8ra00617b |
| 文献子类 | Article |
| 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 ((lf)) of acetic acid (AA) pretreated samples from CA and CLP increased by 20.3% and 4.8%, respectively, and their frequency-dependent MS ((fd)) 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. |
| WOS关键词 | TEMPERATURE-DEPENDENT SUSCEPTIBILITY ; PALEOCLIMATIC SIGNIFICANCE ; LOESS/PALAEOSOL SEQUENCES ; ILI BASIN ; VARIABILITY ; SEDIMENTS ; PALEOSOL ; PEDOGENESIS ; DEPOSITS ; CLIMATE |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000429534200044 |
| 源URL | [http://ir.ieecas.cn/handle/361006/5207]  |
| 专题 | 地球环境研究所_古环境研究室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.Baylor Univ, Dept Geosci, Waco, TX 76798 USA 3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China 4.Linyi Univ, Coll Resources & Environm, Linyi 276005, Shandong, Peoples R China 5.Xian Univ Sci & Technol, Sch Management, Xian 710054, Shaanxi, Peoples R China 6.Environm Monitoring Stn Ili Kazakh Autonomous Pre, Yining 835000, Peoples R China 7.Natl Acad Sci Kyrgyz Republ, Inst Geol, Bishkek 720040, Kyrgyzstan 8.Res Ctr Ecol & Environm Cent Asia Bishkek, Bishkek 720040, Kyrgyzstan |
| 推荐引用方式 GB/T 7714 | Dong, Hongmei,Orozbaev, Rustam,Li, Yue,et al. Effect of chemical pretreatments on magnetic susceptibility of loess from Central Asia and the Chinese Loess Plateau[J]. RSC ADVANCES,2018,8(20):11087-11094. |
| APA | Dong, Hongmei,Orozbaev, Rustam,Li, Yue,Song, Yougui,Zhang, Zhiping,&Wang, Qiansuo.(2018).Effect of chemical pretreatments on magnetic susceptibility of loess from Central Asia and the Chinese Loess Plateau.RSC ADVANCES,8(20),11087-11094. |
| MLA | Dong, Hongmei,et al."Effect of chemical pretreatments on magnetic susceptibility of loess from Central Asia and the Chinese Loess Plateau".RSC ADVANCES 8.20(2018):11087-11094. |
入库方式： OAI收割
来源：地球环境研究所
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