Mineralogy of lunar meteorites, Yamato-82192 and -82193 with reference to breccias in a breccia
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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
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- Memoirs of National Institute of Polar Research. Special issue
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Memoirs of National Institute of Polar Research. Special issue 46 43-55, 1987-03
National Institute of Polar Research
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Details
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- CRID
- 1050565162343327360
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- NII Article ID
- 110000010239
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- NII Book ID
- AA00733561
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- Web Site
- http://id.nii.ac.jp/1291/00002119/
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- Text Lang
- en
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- Article Type
- departmental bulletin paper
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- Data Source
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- IRDB
- CiNii Articles