Environmental magnetic properties of sediments of high arsenic groundwater system, Datong basin

被引：0
|
作者：
Xie, Xian-Jun [1 ]
Wang, Yan-Xin [1 ]
Su, Chun-Li [1 ]
Liu, Huai-Qing [1 ]
Duan, Meng-Yu [1 ]
Zhang, Hong-Da [1 ]
机构：
[1] Laboratory of Biogeology and Environmental Geology, School of Environmental Studies, China University of Geosciences
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2008年 / 33卷 / 01期
关键词：
Arsenic; Datong basin; Environmental magnetism; Groundwater system; Sediment;
D O I：
10.3799/dqkx.2008.016
中图分类号：
学科分类号：
摘要：
The purpose of the study is to test the possible relationship between magnetic parameters and arsenic in high arsenic aquifer sediment. Magnetic and geochemical study on core sediments from Datong basin suggests that the dominant magnetic mineral is ferrimagnetic. Magnetic measurements and arsenic concentration analysis were carried out to understand the distribution characteristics of magnetic parameters and arsenic in sediments. All core samples with high arsenic content have low saturation isothermal remnant magnetism (SIRM) values, indicating the correlation between arsenic and paramagnetic mineral. The correlation factors between arsenic content and magnetic parameters are very low (R2<0.5,α=0.05), but the magnetic susceptibility (x) is better correlated than the other magnetic parameters with correlation factor of about 0.4 (α=0.05). The low correlation between magnetic proxies and arsenic content is attributed to the dilution of paramagnetic minerals by the ferrimagnetic and anti-ferromagnetic minerals. The occurrence of As-rich groundwater in this region may be due to dissolution of As-bearing Fe mineral (e.g. γFeOOH, 5Fe2O3·9H2O) and subsequent arsenic release.
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页码：117 / 123
页数：6
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