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曲げられたハワイアン-皇帝ホットスポット・トラック:マントルの風を継承する
John Tarduno1, Hans-Peter Bunge, Norm Sleep
1Department of Earth and Environmental Sciences, University of Rochester, Rochester, NY 14627, USA. john@earth.rochester.edu
まとめ
ハワイアン-皇帝連鎖のような火山のホットスポットの軌跡は,プレート運動のみを反映していないかもしれません. マントルのダイナミクスは,山脊によって羽根の捕獲を含む,おそらく過去マントルの循環パターンを明らかにし,曲線を引き起こします.
科学分野:
- 地質物理学 地質物理学とは地質物理学です.
- ジオダイナミクスは地力学です.
- 火山学 火山学とは
背景:
- ハワイアン-皇帝の連鎖で例示される火山のホットスポットの軌跡は,伝統的に地質プレート運動の直接記録者として解釈されてきた.
- 最近の地質物理学の研究は,これらの地質学的特徴の曲がり形成のための代替メカニズムを提案し,この見解に異議を唱える.
研究 の 目的:
- ハワイ - 皇帝火山連鎖の重要な曲がりくねりの背後にある主要なドライバーを調査するために.
- ホットスポット・トラックの形成におけるプレート・モーションとマントル・ダイナミクスの役割を評価する.
主な方法:
- 地質学的データの分析.
- 逆モデリング技術の応用.
- マントルの流動のジオダイナミックシミュレーション. マントルの流動のジオダイナミックシミュレーション.
主要な成果:
- 証拠によると,マントルの動力学によって引き起こされるマントルの上流位置の変化は,ホットスポット軌道の曲がりくねりの重要な原因であることを示唆しています.
- 深いマントルの流れが寄与するかもしれないが,広がる山脊によってマントルの羽根を捕捉し,その後のサブ太平洋マントルの流れの変化と組み合わせると,ハワイアン-皇帝の曲がりについてより説得力のある説明を提供します.
結論:
- ホットスポットの軌跡は,プレート運動の指標であるだけでなく,過去マントルの循環パターンの貴重なアーカイブとしても機能します.
- マントルのダイナミクスを理解することは,火山のホットスポットの地質学的記録を正確に解釈するために不可欠です.
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