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村上 元彦*; Goncharov, A. F.*; 平尾 直久*; 増田 亮*; 三井 隆也; Thomas, S. M.*; Bina, C. R.*
Nature Communications (Internet), 5, p.5428_1 - 5428_6, 2014/11
被引用回数:18 パーセンタイル:49.93(Multidisciplinary Sciences)The possible presence of dense magmas at Earth's core mantle boundary is expected to substantially affect the dynamics and thermal evolution of Earth's interior. However, the thermal transport properties of silicate melts under relevant high-pressure conditions are poorly understood. Here we report in situ high pressure optical absorption and synchrotron Mssbauer spectroscopic measurements of iron enriched dense silicate glasses, as laboratory analogues for dense magmas, up to pressures of 85 GPa. Our results reveal a significant increase in absorption coefficients, by almost one order of magnitude with increasing pressure to 50 GPa, most likely owing to gradual changes in electronic structure. This suggests that the radiative thermal conductivity of dense silicate melts may decrease with pressure and so may be significantly smaller than previously expected under core-mantle boundary conditions. Such dark magmas heterogeneously distributed in the lower mantle would result in significant lateral heterogeneity of heat flux through the core mantle boundary.
山崎 千里*; 村上 勝彦*; 藤井 康之*; 佐藤 慶治*; 原田 えりみ*; 武田 淳一*; 谷家 貴之*; 坂手 龍一*; 喜久川 真吾*; 嶋田 誠*; et al.
Nucleic Acids Research, 36(Database), p.D793 - D799, 2008/01
被引用回数:51 パーセンタイル:71.37(Biochemistry & Molecular Biology)ヒトゲノム解析のために、転写産物データベースを構築した。34057個のタンパク質コード領域と、642個のタンパク質をコードしていないRNAを見いだすことができた。