まとめ
低圧下では,岩は不安定さなく変形する. しかし,高圧 (7〜10キロバー) で,特定の岩石は不安定な断層を呈し,潜在的に深い地震を説明します.
科学分野:
- 地質物理学 地質物理学とは地質物理学です.
- ロック・メカニクス ロック・メカニクス
- 地震学 地震学とは
背景:
- 堆積物,変化したマフィック,多孔性の火山岩,砂は,低限圧下では通常柔軟に変形します.
- デクティル変形は,聴覚性弾性ショックのような不安定性の欠如によって特徴付けられます.
研究 の 目的:
- 高限圧下での様々な岩の変形行動を調査する.
- 高圧状態が不安定な故障とスティック・スリップの行動を誘発できるかどうかを判断する.
主な方法:
- 数キロバーから7〜10キロバーまでの圧力の制限で岩石サンプルを実験的に変形させる.
- 変形モードの観察は,不安定性の存在または欠如に焦点を当てて行われます.
主要な成果:
- 低限圧下では,試されたすべての岩型において,変形は柔軟であった.
- 7〜10キロバーの圧力では,特定の岩石サンプルで不安定な断層とスティックスリップの行動が観察されました.
- 柔らかい形状から不安定な形状への移行は圧力に依存していた.
結論:
- 高限圧は,低圧で柔らかく変形する岩石の不安定な断層などの脆性障害メカニズムを誘発する可能性があります.
- この高圧低温の不安定性は,深く埋もれた地質構造で発生する地震の原因となる重要なメカニズムである可能性があります.
- これらの圧力に依存する移行を理解することは,地殻の深い環境における地震リスクの評価に不可欠です.
さらに関連する動画
10:36Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
Published on: May 20, 2018
10:27A Uniaxial Compression Experiment with CO2-Bearing Coal Using a Visualized and Constant-Volume Gas-Solid Coupling Test System
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