いん石中の粘土鉱物および関連鉱物の電子顕微鏡による研究の進展

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  • Recent progress in characterization of phyllosilicates and related minerals in meteorites by electron microscope.
  • インセキチュウ ノ ネンド コウブツ オヨビ カンレン コウブツ ノ デンシ

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Recent progress in characterization of phyllosilicates and related minerals in carbonaceous chondrites is reviewed.<BR>Detailed mineralogical investigations of matrix phyllosilicates and related minerals in carbonaceous chondrites have been carried out especailly by the use of high resolution electron microscope (HREM) with energy dispersive Spectrometer (EDS) for a last decade. It has been clarified that the platy phyllosilicates in carbonaceous chondrite matrix are mostly Fe-rich serpentine. In chondrule groudmass, the presence of 14 Å chlorite was recently confirmed. Another topic on the matrix minerals in carbonaceous chondrite was the discovery of 11 Å and 17 Å phase, which were suggested to be tochilinite and tochilinite-serpentine, respectively. The geneses of these minerals were discussed.<BR>Recently unique C2 chondrites of Y-793321 and B-7904 were found. They do not contain normal phyllosilicates, but intermediate minerals, the presence of which suggests transformation from serpentine to olivines. The possible genesis of this thermal event was discussed.

収録刊行物

  • 粘土科学

    粘土科学 27 (2), 104-116, 1987

    一般社団法人 日本粘土学会

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