Direct Evidence of Sulfidation of Metallic Grain in Chondrites.

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概要

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• A large number of fractures dividing the troilite (FeS) into two distinct layers around metallic grains were observed in chondrite samples (ALH-764 and Y-791717) for the first time in the present study. A similar fracture was successfully reproduced in experiments with iron-meteorite sulfidation. The fracture texture shows that the troilite was formed by reaction between metallic grains mainly composed of Fe-Ni alloy and S-rich gas. The thickness distribution of troilite in chondrites can be used as an indicator of the cooling history of the gas, and as a result, some important constraints can be determined for the formation of chondrites.

• 日本学士院の論文

著者

• IMAE Naoya

  Department of Geology and Mineralogy, Faculty of Science, Kyoto University

関連論文

• Comparative study on the major element chemical compositions of Antarctic chondrites to those of non-Antarctic falls with reference to terrestrial weathering
• Direct Evidence of Sulfidation of Metallic Grain in Chondrites.

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