Estimation of three-dimensional internal structures of some barred olivine chondrules in Allende (CV3) chondrite
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概要
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Three-dimensional internal structures of four BO chondrules in Allende were studied by stacking backscattered electron image photographs of their successive cross sections, which were taken by polishing very carefully these chondrules embedded in epoxy resin. The reconstructed structures show that the BO chondrules investigated are composed of several sets of parallel platy olivine crystals with smooth surfaces. The blanching of the crystals is relatively rare and the olivine plates occasionally have holes. The plates connect to the inner rims of the olivine shells. In a BO chondrule, altered mesostasis with unique texture was found in a restricted region of altered mesostasis, which contains "phlogopite". The "phlogopite"-bearing region is continuous to a sulfide nodule on the surface of the chondrule, which suggests that the volatile that formed "phlogopite" was introduced through a sulfide nodule on the surface of the chondrule.
- 国立極地研究所の論文
著者
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Noguchi Takaaki
Department Of Materials And Biological Science Ibaraki University
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Noguchi Takaaki
Department Of Earth Sciences Ibaraki University
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