関連する実験動画
Updated: Jul 11, 2026

06:04
Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 15, 2013
まとめ
地球 地球 地球 地球 地球 地球
科学分野:
- 地質物理学と地化学について
- 海洋学 海洋学 海洋学
- ミネラル物理学 ミネラル物理学
背景:
- 中洋のは,上層マントルのプロセスに関する洞察を提供します.
- マントルから派生した岩の化学組成は,熱と組成の変動を明らかにします.
研究 の 目的:
- 赤道の大西洋の下にある上層マントルの熱状態を調査する.
- 赤道上の上層マントルの組成と密度を決定する.
- マントルのダイナミクスに対する地球の自転の影響を探求する.
主な方法:
- マントルから派生した海中山脊のペリドータイトとベサルトの化学組成の分析.
- 重力データの解釈. 重力データの解釈.
- 東太平洋上昇からの地殻上昇データとの比較.
主要な成果:
- エクアトリアル・大西洋の上部マントルの溶解度が極めて低い.
- マントルの気温は,通常の中大西洋のリッジよりも少なくとも150°C涼しい.
- 赤道的な大西洋における圧縮されたイソサームと下流するマントルの証拠.
- 太平洋にも同様の赤道熱異常が示唆されている.
- 重力データは高密度,冷たい,そして未消耗した上層マントルの物質を示している.
- 赤道冷帯は,北半球と南半球のマントル領域を区別する.
結論:
- 海洋上部マントルの寒い赤道帯が存在し,地球の自転によって潜在的に影響を受けています.
- この寒帯は,ダウンウェリング,圧縮されたイソサーム,そして未消耗したマントルの組成によって特徴付けられています.
- この発見は,赤道マントルの冷却が海洋の地殻の特性やマントルの領域に影響を及ぼす世界的なパターンを示唆している.
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