Volatile-rich chondrules in the Allende meteorite
A new type of chondrules in the Allende meteorite is rich in volatile elements and shows porphyritic textures similar to terrestrial basalts. This unique type is termed Type V to supplement H. Y. McSWEEN'S (Geochim. Cosmochim. Acta, 41,1843,1977) classification of chondrules in carbonaceous cho...
Main Authors: | , , |
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Format: | Report |
Language: | English |
Published: |
Department of Geology and Mineralogy, Faculty of Science, Kyoto University
1986
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Subjects: | |
Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1970 http://id.nii.ac.jp/1291/00001970/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1970&item_no=1&attribute_id=18&file_no=1 |
Summary: | A new type of chondrules in the Allende meteorite is rich in volatile elements and shows porphyritic textures similar to terrestrial basalts. This unique type is termed Type V to supplement H. Y. McSWEEN'S (Geochim. Cosmochim. Acta, 41,1843,1977) classification of chondrules in carbonaceous chondrites. The Type V chondrules form a continuous trend with the Type I and II chondrules in the (Na+K)-(Al)-(Si) and (Na+K)-(Al+Ca)-(Mg+Fe) ternary systems. Type IV is plotted between Type V and CAI's. These compositional features of the different types of chondrules suggest that Type V was resulted from a fractionation process in the precusor materials of the Allende meteorite. |
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