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（x）机理进行了研究。浙江玄武岩发育土壤的x为100×10-8～500×10－8m3／kg，云南玄武岩发育土壤的x500×10-8～2000×10－8m3／kg，合成针铁矿的x为31．99×10-8m3／kg，赤铁矿x为84．5×10－8m3／kg，且合成氧化铁的x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x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x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。
The mechanism of magnetic susceptibility (x) 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 x of soil derived from basalt in Zhejiang Province ranged from 100×10-8-500×10-8m3/kg. x of soils derived from basalt in Yunnan Province ranged from 500×10-8-2000×10-8 m3/kg. x of synthesized goethite and hematite were 31.9×10-8m3/kg and 84.5×10-8m3 /kg, respectively. x of synthesized iron oxides increased as aluminum-substituted amount of iron oxide increased. The magnetic parameter and X-ray powder diffration pattern of soils indicated that x of soil derived from basalt in Yunnan Province mainly contributed to the superparamagnetic maghemite and magnetite, which is pedogenic origin. x of soils derived basalt in Zhejiang Province came from the contributions of both primary magnetic grains and secondary magnetic minerals, and hematite.
出处
《土壤学报》
CAS
CSCD
北大核心
1999年第4期544-550,共7页
Acta Pedologica Sinica
基金
国家自然科学基金!49301010
关键词
土壤
玄武岩
铁磁性矿物
磁化率
X-衍射分析
Basalt, Ferrimagnetic minerals, Magnetic susceptibility, Iron oxide, X-ray diffraction analysis
