Yamato-694 Meteorite: Chemical Composition of Silicate Minerals and Petrographic Nature

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概要

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• Yamato-694 meteorite collected near the Yamato Mountains in Antarctica in 1969 is an ordinary chondrite belonging to a high-iron group. Major chemical composition of its silicate minerals was determined by electron probe microanalysis. Molar composition of olivine, orthopyroxene and plagioclase is (Fo)_<81>, (En)_<82> and (An)_<10>, respectively. In comparison with the analytical data of silicate minerals in ordinary chondrites, the chemical composition of olivine, orthopyroxene and plagioclase in Yamato-694 meteorite agrees with that of silicate grains in equilibrated high-iron chondrites. The result corresponds to the microscopic feature of this meteorite specimen showing an advanced recrystallization texture.

• 国立極地研究所の論文

著者

• Okada Akihiko

  The Institute Of Physical And Chemical Research

• Shima Makoto

  The Institute of Physical and Chemical Research

関連論文

• Yamato-694 Meteorite: Chemical Composition of Silicate Minerals and Petrographic Nature
• Petrological Studies of the Yamato Meteorites Part1. Mineralogy of the Yamato Meteorites
• Mineralogical and Petrographical Studies of the Yamato Meteorites, Yamato-7301(j), -7305(k), -7308(l) and -7303(m) from Antarctica
• Petrological Studies of the Yamato Meteorites Part2. Petrology of the Yamato Meteorites
• Study on the Extraterrestrial Materials in Antarctica (VIII). On the Distribution of the Yamato Meteorites
• Structure of tetra-.MU.-formatodiruthenium bromide.

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