ユレイライト中のダイヤモンドの新成因説とその実験的検証(1992年度日本地球化学会賞受賞記念)

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概要

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• We synthesized vapor-growth diamonds and shock-produced diamonds, and examined elemental abundances and isotopic compositions of noble gases in them. The trapping mechanism of noble gases in these synthetic diamonds has been verified from this study. We have examined various features of diamonds in ureilites and compared with those in synthetic diamonds, and concluded that the vapor-growth hypothesis is better than the impact-shock hypothesis for the origin of diamonds in ureilites. The diamond (and graphite, amorphous carbon, too) have been deposited on early condensate such as Re, Ir, W etc. in the primitive solar nebula, which explains the chemical features of vein material in ureilites. The vapor-growth model shows that nebular processes are primarily responsible for the chemical composition of ureilites.

• 日本地球化学会の論文
• 1993-11-05

著者

• 松田 准一

  大阪大学理学部宇宙・地球科学教室

関連論文

• New Campus(2) : 大阪大学理学部宇宙・地球科学科
• ユレイライト中のダイヤモンドの新成因説とその実験的検証(1992年度日本地球化学会賞受賞記念)

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