Archive > Volume 36 Issue 4 > 1999,36(4):544-550. DOI:10.11766/trxb199808130415 CSTR:[cstr] Prev Next
MAGNETIC SUSCEPTIBILITY OF SOILS DERIVED FROM BASALT AND ITS MECHANISM
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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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