Mineralogy of lunar meteorites, Yamato-82192 and -82193 with reference to breccias in a breccia

• Takeda,Hiroshi

• Mori,Hiroshi

• Tagai,Tokuhei

Abstract

type:P(論文)

The mineralogy of pyroxene, olivine and plagioclase fragments, lithic clasts and glassy matrices of lunar meteorites, Yamato-82192 (Y-82192) and Yamato-82193 (Y-82193), has been studied by an electron microprobe and an analytical transmission electron microscope (TEM). The distribution of the chemical compositions of pyroxene grains in Y-82192 and -82193 bears a strong resemblance to one another and covers almost all known pyroxenes in nonmare pristine rocks. They are similar to those of a lunar regolith breccia 60019,but appear to be different from Y-791197 and ALHA81005 in that Y-82 lunar meteorites have significantly fewer pyroxenes with extremely high Fe content. The difference implies that Y-82192 and -82193 may contain a fewer Fe-rich mare basalt components. The presence of a breccia in a breccia in Y-82192 indicates complex impact histories in the region where this meteorite was derived. The texture of the matrix glass of Y-82192 in the TEM scale is different from that of ALHA81005.

Journal

• Memoirs of National Institute of Polar Research. Special issue

  Memoirs of National Institute of Polar Research. Special issue 46 43-55, 1987-03

  National Institute of Polar Research

Details

• CRID: 1050565162343327360
• NII Article ID: 110000010239
• NII Book ID: AA00733561
• Web Site: http://id.nii.ac.jp/1291/00002119/
• Text Lang: en
• Article Type: departmental bulletin paper
• Data Source:
  • IRDB
  • CiNii Articles