玄武岩发育土壤的磁化率及其机理解析
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* 国家自然科学基金资助项目(批准号49301010)


MAGNETIC SUSCEPTIBILITY OF SOILS DERIVED FROM BASALT AND ITS MECHANISM
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    摘要:

    应用矿物磁测技术和X-射线衍射分析对浙江和云南玄武岩发育土壤的磁化率(χ)机理进行了研究。浙江玄武岩发育土壤的χ为100×10-8~500×10-8m3/kg,云南玄武岩发育土壤的χ500×10-8~2000×10-8m3/kg,合成针铁矿的χ为31.99×10-8m3/kg,赤铁矿χ为84.5×10-8m3/kg,且合成氧化铁的χ随氧化铁的铝替代量增大而增加。土壤的磁性参数和X-射线衍射分析证明,云南玄武岩发育土壤的χ主要由超顺磁性态(SP)磁赤铁矿和磁铁矿贡献,浙江玄武岩发育土壤的χ由原生和次生的磁铁矿和磁赤铁矿贡献,且赤铁矿对土壤x也起到一定的作用。

    Abstract:

    The mechanism of magnetic susceptibility (χ) of soil derived from basalt in Zhejiang and Yunnan Provinces was studied by applying mineral magnetic measurement technique and X-ray powder diffraction. Results showed that χ of soil derived from basalt in Zhejiang Province ranged from 100×10-8-500×10-8m3/kg. χ of soils derived from basalt in Yunnan Province ranged from 500×10-8-2000×10-8 m3/kg. χ of synthesized goethite and hematite were 31.9×10-8m3/kg and 84.5×10-8m3 /kg, respectively. χ of synthesized iron oxides increased as aluminum-substituted amount of iron oxide increased. The magnetic parameter and X-ray powder diffraction pattern of soils indicated that χ of soil derived from basalt in Yunnan Province mainly contributed to the superparamagnetic maghemite and magnetite, which is pedogenic origin. χ of soils derived basalt in Zhejiang Province came from the contributions of both primary magnetic grains and secondary magnetic minerals, and hematite.

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卢升高,张子玉,俞劲炎,张卫国,俞立中.玄武岩发育土壤的磁化率及其机理解析[J].土壤学报,1999,36(4):544-550. DOI:10.11766/trxb199808130415 Lu Sheng-gao, Zhang Zi-yu, Yu Jin-yan, Zhang Wei-gao, Yu Li-zhong. MAGNETIC SUSCEPTIBILITY OF SOILS DERIVED FROM BASALT AND ITS MECHANISM[J]. Acta Pedologica Sinica,1999,36(4):544-550.

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  • 收稿日期:1998-08-13
  • 最后修改日期:1998-12-13
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  • 在线发布日期: 2013-02-25
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