Yamato-694 Meteorite: Chemical Composition of Silicate Minerals and Petrographic Nature
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 (...
| Main Authors: | , |
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| Format: | Report |
| Language: | English |
| Published: |
The Institute of Physical and Chemical Research
1979
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| Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=962 http://id.nii.ac.jp/1291/00000962/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=962&item_no=1&attribute_id=18&file_no=1 |
| Summary: | 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. |
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