Magnetic anisotropy and porosity of Antarctic chondrites

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概要

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• Magnetic susceptibility anisotropy and porosity were measured in eleven Antarctic meteorites. These meteorites are ordinary chondrites (H and L type) in various metamorphic stages. Large magnetic anisotropy has been observed in most of the chondrites. The foliation type of the anisotropy, inferred from the shape of the susceptibility ellipsoid indicates that a uniaxial compressional type deformation is responsible for the anisotropy. The degree of the anisotropy and the porosity do not correlate with the petrologic type of the chondrites. Based on the present observation, dynamical compression during the initial accumulation stage of chondritic parent bodies was concluded as a main cause of the anisotropy. Porosity-anisotropy relation in these chondrites suggests that this accumulation stage also determined the observed porosity values.

• 国立極地研究所の論文

著者

• Yomogida Kiyoshi

  Geophysical Institute, Faculty of Science, University of Tokyo

• Hamano Yozo

  Geophysical Institute University Of Tokyo

• Hamano Yozo

  Geophysical Institure University Of Tokyo

• Yomogida Kiyoshi

  Geophysical Institute Faculty Of Science University Of Tokyo

• Yomogida Kiyoshi

  Geophysical Institute University Of Tokyo

関連論文

• Physical properties of some unequilibrated Antarctic ordinary chondrites
• The First Realtime Measurement of Seafloor Geomagnetic Total Force-Ocean Hemisphere Project Network
• Magnetic anisotropy and porosity of Antarctic chondrites

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