Mineralogy and petrology of chondrule in Ouallen (Tanezrouft) meteorite
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概要
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A chondritic meteorite is found at the Sahara desert about 135 km WSW of Ouallen, Algeria in 1936. It contains various kinds of chondrules, up to 0.2-2 mm in diameter. Constituent minerals of chondrules are olivine, Ca-poor pyroxene, and those of matrix are olivine, Ca-poor pyroxene, Ca-rich pyroxene, troilite, chromite and kamacite. Glass fills the interstices of olivines and pyroxenes in chondrules. The average chemical compositions of olivine, Ca-poor pyroxene and Ca-rich pyroxene are Fa_<25.8>, Wo_<1.8>En_<79.9>Fs_<18.3> and Wo_<34.7>En_<52.7>Fs_<12.6>. The average Fe/(Fe+Mg) rations of olivine, Ca-poor and Ca-rich pyroxenes in the barred chondrule are similar to those of the host rock in Ouallen chondrite. There is a wide range of Fe/(Fe+Mg) rations of olivine, Ca-poor and Ca-rich pyroxenes. The boundary between chondrules and matrix is distinct. Based on the texture and olivine composition, the Ouallen chondritic meteorite belongs to L3 chondrite after Van Schmus and Wood's classification (1967).
- 上越教育大学の論文
著者
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HAYASHI Akiko
Department of Obstetrics, Center for Perinatal Medicine, Nagano Children's Hospital
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Nagase Kumiko
Miyazaki Prefectural School For The Handicapped Children
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Oba Takanobu
Department of Geoscience
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Oba Takanobu
Department Of Electrical And Communication Engineering Graduate School Of Engineering Tohoku Univers
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Hayashi Akiko
Department Of Biological And Environmental Science Faculty Of Agriculture Kobe University:(present A
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Hayashi Akiko
Department Of Geoscience
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