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Frontiers of Earth Science

ISSN 2095-0195

ISSN 2095-0209(Online)

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Front Earth Sci Chin    0, Vol. Issue () : 259-265    https://doi.org/10.1007/s11707-009-0041-5
RESEARCH ARTICLE
Magnetic characteristics of topsoil from Xinjiang, Northwestern China, and their implications
Haitao WEI1, Dunsheng XIA1,2(), Fahu CHEN1, Ming JIN1, Haibin WANG1, Jia JIA1
1. Key Laboratory of West China’s Environmental System (Ministry of Education), Lanzhou University, Lanzhou 730000, China; 2. Key Laboratory of Desert and Desertification, Institute of Cold and Arid Regions Environmental and Engineering, Chinese Academy of Sciences, Lanzhou 730000, China
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Abstract

In this study, a set of environmental magnetic parameters (χlf, χfd%,χARM, SIRM, HIRM, SOFT and SIRM/χlf, χARM/SIRM and χARM/χlf) of 331 top-soil samples from Xinjiang Uygur Autonomous Region of China were systematically measured and the magnetic characteristics and its environmental significance were discussed. Our results indicate that the main magnetic minerals of these top-soils are single-domain magnetite. The content of magnetic minerals in top-soils from north Xinjiang is higher than that from south Xinjiang; however, the content of hard magnetic minerals is higher in the top-soils from south Xinjiang. The top-soils from Yili region contain similar magnetic minerals as that from south Xinjiang, but with much stronger magnetic SP content due to higher pedogenic processes. The differences in magnetic characteristics among top-soils from different regions of Xinjiang might reflect the differences of regional climatic factors, especially the precipitation.
Keywords environmental magnetism      top-soil      magnetic susceptibility      Xinjiang Uigur Autonomous Region     
Corresponding Author(s): XIA Dunsheng,Email:dsxia@lzu.edu.cn   
Issue Date: 05 September 2009
 Cite this article:   
Haitao WEI,Dunsheng XIA,Fahu CHEN, et al. Magnetic characteristics of topsoil from Xinjiang, Northwestern China, and their implications[J]. Front Earth Sci Chin, 0, (): 259-265.
 URL:  
https://academic.hep.com.cn/fesci/EN/10.1007/s11707-009-0041-5
https://academic.hep.com.cn/fesci/EN/Y0/V/I/259
Fig.1  Map showing the sampling sites
Fig.2  Magnetic parameters of top soil from Xinjiang
Fig.3  T-c curves and magnetic hysteresis loops of top soil from Xinjiang
North XinjiangYili ValleySouth XinjiangKumutage
maxminmeanmaxminmeanmaxminmeanmaxminmean
χlf /(10-8 m3·kg-1)1178.37 20.25 205.36 108.88 25.32 72.19 377.16 9.77 75.27 68.78 18.19 29.36
SIRM/(10-5 Am2·kg-1)10438.83 219.52 2135.60 1468.57 227.64 858.85 2817.76 127.98 780.66 1061.21 283.28 508.54
χfd%/%6.88 0.77 1.82 6.60 0.69 2.43 5.55 0.15 1.62 3.81 0.21 1.83
χARM/(10-8 m3·kg-1)776.11 57.38 243.45 421.35 43.67 152.94 212.58 24.94 78.12 147.80 31.32 75.43
HIRM/(10-5 Am2·kg-1) 181.71 13.72 60.74 76.41 10.08 40.17 154.25 4.76 42.05 53.87 13.38 27.55
SOFT/(10-5 Am2·kg-1) 2690.54 41.87 603.72 371.06 60.50 209.05 988.99 20.78 226.85 330.60 62.42 124.89
HARD%/%11.72 0.80 3.50 9.50 3.33 4.90 39.63 1.36 6.95 7.54 2.97 5.64
S-20 mT /%45.79 19.08 27.38 29.77 21.05 24.70 41.90 11.59 27.02 40.41 11.70 24.24
S-100 mT /%86.24 55.10 78.17 78.56 69.37 73.94 86.89 39.17 75.27 85.07 64.15 72.14
S-300 mT /% 99.20 88.28 96.50 96.67 90.50 95.10 98.64 60.37 93.05 97.03 92.46 94.36
SIRMχif /(103 Am-1)19.29 4.05 11.78 15.96 5.87 11.69 21.38 3.96 11.48 28.06 6.60 18.19
χARMSIRM/SIRM/(10-3 Am-1)0.50 0.07 0.14 0.49 0.10 0.19 0.15 0.08 0.12 0.19 0.12 0.15
Tab.1  Magnetic parameters of topsoil samples from Xinjiang
Fig.4  Scatter plot of magnetic parameters of top soil from Xinjiang
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