初期太陽系と初期地球の形成過程
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初期太陽系と初期地球の形成過程. 図１４. 原始太陽系星雲の冷却と凝縮（Ｃｏｎｄｅｎｓａｔｉｏｎ）、そして集積 (accretion). 図１１. 図１３. スノーライン Snow line (Ice line, Frost line). 45. 図１２. 水や氷は太陽系の様々な惑星や衛星に存在する. トリトンの氷火山 （海王星の衛星 ）. 木星の衛星 ガリレオ衛星. イオ. エウロパ. ガニメデ. カリスト. 地球. 月. 海王星. ボイジャー２号画像. 9. 46. 図１５ . ジャイアントインパクト. - PowerPoint PPT PresentationTRANSCRIPT
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(accretion)
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Snow line (Ice line, Frost line)45
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946
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A.G.W. CameronGiant impact was an energetic processDeep magma ocean or total melting of the Earth is compatible with the giant impact model2011/12/21
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How deep was the terrestrial magma ocean ?What is the condition of the metal-silicate equilibrium, low pressure or high pressure ?
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Sm Eu Gd
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5
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, DF (core)=0.325F(mantle)=0.675wt.fractionC: abundancewt.%)
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, , GPa>40 GPaNiCoCo/Ni Co/NiCo/Ni in the mantle implies very deep magma ocean
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Grain 1Asuka 881757 (lunar meteorite)Grain 2Grain 3 the mean age of the glass and the maskelynite, 3798+/-12Ma of the 39Ar-40Ar ages
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[1] Misawa et al. (1993) GCA 57, 4687-4702:
A-881757Sm-Nd 3870 Ma 3939Ar - 4040Ar 3800 Ma.
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The main mass (in private hands) of 155,57 gAlmahata SittaMeteorongs in large number (basalt)http://www.haberer-meteorite.de/english/Asteroid%202008%20tc3/Asteroid%202008%20TC.htmlCoarse-grained Ureilite MS-170 Slices & fragments
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