地質学と深層マントルの流れの相互作用によるホットスポット運動の急速な爆発
Rakib Hassan1, R Dietmar Müller1, Michael Gurnis2
1EarthByte Group, School of Geosciences, University of Sydney, Sydney, New South Wales 2006, Australia.
Nature
|May 13, 2016
まとめ
ハワイアン・エンパイア・ホットスポット線路の曲がりは 潜水によって引き起こされた 強力な深層マントルの流れによるものです この流れはマントルの羽根を傾け 源を誘導し 独特の軌道の幾何学を説明した.
科学分野:
- 地理学
- 地力学
- プレート構造
背景:
- 火山のホットスポットの痕跡は,マントルの上のプレート移動を明らかにします.
- 深層マントルの羽根は下層マントルの熱化学構造に根付いている.
- ハワイアン・エンパイア・ホットスポット・トラックの急な曲がりはよくわからない.
研究 の 目的:
- ハワイアン・エンパイア・ホットスポット・トラック・カーブの ダイナミクスを調べるため
- 下層マントルの熱化学的コンベクションをモデル化する.
主な方法:
- 熱化学コンベクションの古地理的に制限された数値モデリング.
- マントルの流れの動態と羽根の誘導の分析
主要な成果:
- 北太平洋の下の深層マントルの流れは,潜水による異常な活力 (100-50万年) であった.
- 強烈な流れにより 羽根の傾きと源の横向きの傾きが起こり ハワイアン・エンパイア・カーブが形成された.
- サブドクションの影響による不対称なマントルの変形は,異なるホットスポット軌道を説明します.
結論:
- 深いマントルの流れのダイナミクスは 特に北太平洋の激しい流れは ハワイアン-皇帝の曲線を説明します
- 潜水システムは下層マントルの流れとホットスポット軌道進化に大きく影響した.
- 深いマントルの構造の非対称な変形は,太平洋ホットスポットトラックの明確な経路を制御しました.
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