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| 磁铁矿区河流沉积剖面中磁化率与重金属含量相关性分析 |
| Correlation Analysis on Magnetic Susceptibility and Heavy Metal Content in Fluvial Sedimentary Profile around Magnetite Mine |
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| DOI： |
| 中文关键词: 磁化率 重金属污染 河流沉积物 磁铁矿区 |
| 英文关键词: Magnetic susceptibility Heavy metal pollution Fluvial sediment Magnetite mine |
| 基金项目:广州市科技计划基金资助项目（No.201707010417）；广东省自然科学基金重点资助项目（No.2017A030311020）；广东省科学院基金资助项目（No.2016GDASRC-0209，No.2018GDASCX-0101）；国家自然科学基金资助项目（No.41301582 ）；广东省科技计划基金资助项目（No.2015A070710016,No.2013B030700005）； |
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| 中文摘要: |
| 选择广东省铁帽顶铁矿区下游一河流沉积剖面为研究对象，测定沉积物的磁化率与元素含量并作相关性分析，以考察磁铁矿床周边沉积物磁化率指标对重金属富集程度的指示作用。结果显示，该剖面中低频质量磁化率χlf为〖JP〗087×10-6 m3/kg~184.93×10-6 m3/kg，频率磁化率χfd为0.5%~7%。χlf仅与Fe2O3呈现极显著的正相关关系，与其他重金属元素相关性差；χfd与Mn、Pb、Cd及REE均呈正相关；元素Cu、Zn、As等与χlf、χfd的相关性都很差。表明在该种磁化率和重金属元素含量背景值均高的特殊地区，简单地利用磁化率指标指示重金属污染水平需谨慎。 |
| 英文摘要: |
| A dowmstream sedimentary profile in Guangdong Tiemaoding mining area was selected as the research objective, the correlation between magnetic susceptibility and heavy metal content in the sediment was studied on magnetic susceptibility indicating the enrichment of heavy metal in the surroundings of the magnetite deposit. The results showed that the low frequency magnetic susceptibility (χlf) ranged from 0.87×10-6 m3/kg to 184.93×10-6 m3/kg, and the frequency magnetic susceptibility (χfd) ranged from 0.5% to 7%. χlf had only a significant positive correlation with Fe2O3, and was poorly correlated with other heavy metals. Mn, Pb, Cd and REE had significant positive correlations with χfd. Cu, Zn and As had poor correlation with χlf or χfd. Caution is needed when simply using magnetic susceptibility index indicating heavy metal pollution in the special area with high background of magnetic susceptibility and heavy metal content. |
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