ダイヤモンドに含まれる氷のVII:地球の深いマントルの水性液体の証拠
O Tschauner1, S Huang2, E Greenberg3
1Department of Geoscience, University of Nevada, Las Vegas, NV 89154, USA. olivert@physics.unlv.edu.
まとめ
天然のダイヤモンドは,氷-VIIを含み,地球の奥深くを明らかにします.
科学分野:
- 地化学
- ミネラロジー
- 地理学
背景:
- 地球の深層の貯水池は 地球の水循環と元素の移動に影響を与えます
- これらの貯水池の構成と範囲は 十分に理解されていない.
研究 の 目的:
- 地球の奥深くにある水分豊かな地域を 特定するためです
- ダイヤモンドに含まれる特定の鉱物の役割を調査する.
主な方法:
- 天然ダイヤモンド内の鉱物含有物の分析
- 高圧と高温の鉱物物理学
主要な成果:
- アイス-VIIは,水の高圧ポリモルフであり,天然ダイヤモンドのインクルージョンとして識別されました.
- 氷VIIの存在は,ダイヤモンド形成中の水性液体からの結晶化を示しています.
- 氷のVIIは高圧 (最大24GPa) にも存在し,地球の深さの証拠を保持しています.
結論:
- ダイアモンドの氷のVIIは 深いマントルの水豊富な環境の直接的な指標として機能します
- これらの発見は,上部移行区と660kmの境界が重要な液体豊かな地域であることを示唆しています.
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