Origin and Evolution of Condrules Based on Na/Al-Dispersion and -Convergence in Yamato-74 Ordinary Chondrites
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概要
- 論文の詳細を見る
Na/Al convergence has been observed in groundmass of chondrules and matrix from seven Yamato-74 (H, L, 4-5) chondrites. On the other hand, Na/Al dispersion has prevailed in groundmass of chondrules and matrix from Yamato-74191 (L3) chondrite. The results suggest that : (1) Primordial liquid droplets as precursors of the chondrules might be derived from a rapidly cooling solar nebula by fractional condensation. (2) The hot liquid droplets thus formed might be cooled instantaneously by radiation loss in the cooling nebula. (3) The chondrules as quenched products might be subjected to mutual collision during accumulation in the cold nebula. (4) Planetesimals accumulated by the chondrules might be transferred from the place of birth to an unknown hot region in the proto solar nebula.
- 国立極地研究所の論文
著者
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Nishida Norimasa
Chemical Analysis Center The University Of Tukuba
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Kimura Makoto
Department of Mathematics, Faculty of Science and Engineering, Shimane University
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Onuma Naoki
Institute Of Chemistry The University Of Tukuba
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Ohtsuka Yoshiro
Institute of Geoscience, The University of Tsukuba
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Yanai Keizo
National Institute of Polar Research
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Ohtsuka Yoshiro
Institute Of Geoscience The University Of Tukuba
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Kimura Makoto
Department Of Applied Chemistry Graduate School Of Engineering Nagoya University
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Kimura Makoto
Department Of Geology And Mineralogy Faculty Of Science Hokkaido University
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Kimura Makoto
Department Of Applied Biochemistory Utsunomiya University
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