メガスラスト切断力は,収束板の縁の山の高さを制御する
Armin Dielforder1, Ralf Hetzel2, Onno Oncken3
1Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany. armin.dielforder@gfz-potsdam.de.
Nature
|June 13, 2020
まとめ
山脈の高さは主に地質プレート境界 (メガトラスト) 沿いの切断力によって制御されるが,気候によって制御されない. この研究は,山の高さが 構造的に支えられている高さと一致していることを示し, 力の均衡を示しています.
科学分野:
- 地質学
- 構造学
- 地形学
背景:
- 山脈の高さは議論されており,気候によって引き起こされる侵食が主な制御要因であるとしばしば考えられている.
- 地質学的な力と 絶え間ない山の上昇の関係が 明らかになっていない.
研究 の 目的:
- フォース・バランス・モデルを用いて山脈の構造的に支える高さを決定する.
- 世界的に山脈の高さの主要な要因を調査する.
主な方法:
- リオロジカルな性質を用いて,アクティブなメガトラストに沿って切断力を抑制する.
- 構造的に支えられた高さを計算するために,力平衡モデルを適用する.
主要な成果:
- 山脈の高さは,計算された構造的に支えられた高さと一致します.
- この相関は気候や侵食率に関係なく成立します
結論:
- 山脈の高さは主にメガスラスト・シャー・フォースによって制御され,力の均衡状態を示している.
- 長期にわたる山の高さの変動は 力のバランスの変化を反映し 直接的な気候制御ではありません
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