ワイオミング州南部のキンベルライトからの上部マントルのペリドートノードルにダイヤモンドが含まれる
まとめ
ワイオミング州のペリドータイトノードルでダイヤモンドが発見され,北米のキンベルライト研究にとって重要な発見となりました. この発見は,上層マントルのダイヤモンドの発生とキンベルライトパイプの組成に関する新しい洞察を提供します.
科学分野:
- 地質学 地質学 地質学
- ミネラロジーは,鉱物学です.
- 上部マントラ・ペトロロジー 上部マントラ・ペトロロジー
背景:
- ダイヤモンドは,通常,特定の地質学的な構造で発見されます.
- 上層マントルのクセノライトは,地球深層の条件の重要なサンプルを提供します.
- キンベルライトの侵入は,ダイヤモンドとマントルの材料の主要な源である.
研究 の 目的:
- 北米のキンベルライトからの上層マントルのペリドータイト・クセノリトにダイヤモンドが初めて発見されたことを記録する.
- 独特の蛇形化したガーネット・ペリドートノードルの構成と起源を分析する.
- 北米上層マントルのダイヤモンド形成と輸送の理解に貢献する.
主な方法:
- ペリドータイトの結節のペトログラフィック分析.
- クセノリスの成分の鉱物学的特徴.
- ワイオミングのダイアトレムとキンベルライトの侵入の地質学的調査.
主要な成果:
- ダイヤモンドは,蛇形化したガーネットのペリドータイトノードルの中で特定されました.
- これは,北米のキンベルライトからの上層マントルのペリドータイト・キセノリトにダイヤモンドが初めて知られていることを表しています.
- 結節は130~180kmの深さにある枯渇したルヘルゾライトの部分から発生したと推論されている.
結論:
- この発見は,予期せぬマントル・キセノリトでダイヤモンドを発見する可能性を強調している.
- この発見は,北米のキンベルライト系におけるダイヤモンドの分布の理解を深める.
- 桃石の結節は,ワイオミング州南部の下にある上層マントルの状態に関する貴重なデータを提供します.
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