動的形成の微細マイクロダイヤモンド炭素の研究

抄録

1. Introduction: Previous formations of large to micro diamonds are studied on solid-changes of carbon-rich starting materials of graphite or fullerene. The purpose of this study is to elucidate dynamic process of micro to nano-diamonds including material state changes [1, 2].
2. Micro-diamond carbon by artificial explosive formation: Artificial micro-diamond formed by explosive process (as dynamic standard) shows clear shapes with carbon-rich composition (and Si etc.) obtained by the FE-SEM data and micro-Raman spectral patterns..
3. Natural micro-diamond carbon from Yamaguchi, Japan: Natural formation of carbon-rich samples with mixed compositions are found at volcanic basalt on Shimonoseki, Yamaguchi, Japan, which are checked so far by the FE-SEM (as carbon-rich) and micro-Raman spectral pattern (as diamond main peak) .
4. Discussion: Gem-crystals of diamonds can be also related with shallow carbon sources of carbonatite (or calcite) by reaction within ring dikes, where are compared with artificial impacts [2] and volcanic breccias of Arkansas (U.S.A.) diamonds. Localized carbon-bearing breccias at the interior triggered initially by shock wave process can be formed at shallow sites during long geological history.
5. Summary: Diamond-like carbon grains were found at volcanic basalts of Yamaguchi, Japan, which are studied by the micro-Raman and FE-SEM.