毛北榴辉岩古地磁及岩石磁学初探

孟小红; 余钦范; 郭友钊; 周姚秀

Volume 32 Issue 4

Jul. 2007

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Article Navigation > Earth Science > 2007 > 32(4): 533-539

MENG Xiao-hong, YU Qin-fan, GUO You-zhao, ZHOU Yao-xiu, 2007. A Pilot Study on Paleomagnetism and Rock Magnetism of Maobei Eclogite. Earth Science, 32(4): 533-539.

Citation:

MENG Xiao-hong, YU Qin-fan, GUO You-zhao, ZHOU Yao-xiu, 2007. A Pilot Study on Paleomagnetism and Rock Magnetism of Maobei Eclogite. Earth Science, 32(4): 533-539.

MENG Xiao-hong, YU Qin-fan, GUO You-zhao, ZHOU Yao-xiu, 2007. A Pilot Study on Paleomagnetism and Rock Magnetism of Maobei Eclogite. Earth Science, 32(4): 533-539.

Citation:

MENG Xiao-hong, YU Qin-fan, GUO You-zhao, ZHOU Yao-xiu, 2007. A Pilot Study on Paleomagnetism and Rock Magnetism of Maobei Eclogite. Earth Science, 32(4): 533-539.

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A Pilot Study on Paleomagnetism and Rock Magnetism of Maobei Eclogite

1.
State Key Laboratory of Geological Processes and Mineral Resources; Geo-detection Laboratory of the Ministry of Education, Beijing 100083, China
2.
School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China
3.
Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, China
4.
China Aero Geophysical Survey and Remote Sensing Center for Land and Resources, Beijing 100083, China

Received Date: 2007-04-12
Publish Date: 2007-07-25

Abstract

Abstract

In this paper, a pilot study of paleomagnetism and rock magnetism is done on 55 eclogite samples collected from Maobei area, Donghai County, Jiangsu Province. Synchronously, some of the samples are analyzed by electron-probe and scanning electric microscope, and tested for the isothermal remanence, hysteresis loop, magnetic fabric, thermal magnetic properties. The result indicates that there are two groups of stable remanence, i. e- the normal polarity and reversed polarity. The remanence orientations are: D=94. 3°, I=-29. 1° and D=273. 7°, I=15. 4° respectively. The magnetization and the density of the samples with normal polarities are very different from that of the samples with reversed polarities. The magnetic anisotropy is weak, and the minimum axis is hardly confirmed. The isothermal remanence and the hysteresis loop show that the magnetic carriers of the eclogite may be SD (single domain) and PSI) (pseudo-single domain) magnetite. According to the magnetic property, the cause of the formation of magnetic carrier, the causation of the remanence, and the significance for the geotectonic are discussed at the end of the paper.
- paleomagnetism,
- rock magnetism,
- eclogite,
- ultrahigh-pressure metamorphic zone.

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References(31)

References

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