Diffraction profile analysis of olivines in thin sections of meteorites by the micro-region Laue method using synchrotron radiation

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概要

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• The lattice distortion of minerals included in a thin section of meteorites was measured by a newly developed X-ray technique for microregion analysis (8μm diameter) using synchrotron radiation. This technique using the Laue method with an imaging plate (IP) as a two-dimensional detector, as well as a micro-pinhole, was applied to olivine grains in two L6 chondrites (Y-7304 and Y-7305). The orientation matrix calculated from one end of the full width at half maximum (FWHM) along the elongated diffraction profiles is different from that based on the other end of the FWHM. Rotation about a certain axis equates one matrix to the other. The rotation angles for the Y-7304 and Y-7305 olivines were calculated to be 0.83 and 0.15 degrees, respectively, and are compatible with the FWHM of diffraction profiles. The results of the present X-ray study correspond quantitatively to the wavy extinction observed through an optical microscope. This method will be applied to analyze the lattice distortion of minerals caused by shock effects in meteorites.

• 国立極地研究所の論文

著者

• KOJIMA Hideyasu

  National Institute of Polar Research

• Yanai Keizo

  National Institute of Polar Research

• Ohsumi Kazumasa

  Photon Factory, National Laboratory for High Energy Physics

• Miyamoto Masamichi

  Mineralogical Institute, Graduate School of Science, University of Tokyo

• Yanai K

  Iwate Univ. Morioka

• Kojima Hideyasu

  Department Of Meteorites National Institute Of Polar Research

• Ohsumi K

  High Energy Accelerator Res. Organization Tsukuba

• Ohsumi Kazumasa

  Photon Factory Institute Of Materials Structure Science Kek

• Takase Toshiro

  Mineralogical Institute, Faculty of Science, University of Tokyo

• Takase Toshiro

  Mineralogical Institute Faculty Of Science University Of Tokyo

• Miyamoto M

  Mineralogical Institute Graduate School Of Science University Of Tokyo

• Miyamoto Masamichi

  Mineralogical Institute Graduate School Of Science University Of Tokyo

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