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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
Published on: August 1, 2017
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短命なオロジェニックサイクルと,冷たい地殻のエクロギティゼーションは,スパムティックな熱い流体によるものです
Alfredo Camacho1, James K W Lee, Bastiaan J Hensen
1Geological Sciences and Geological Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada.
Nature
|July 1, 2005
まとめ
衝突テクトニクスは,大陸の地殻を,エコロギットのような高圧岩に急速に変容させる. 新しいデータは,変形現象が数千年に一度発生し,熱パルスが数十年しか続かないことを明らかにし,既存の熱モデルに挑戦しています.
科学分野:
- 地質学 地質学 地質学
- テクトニクス (地質学) とは
- メタモルフ Petrology メタモルフペトロロジー
背景:
- 衝突テクトニクスは,大陸の地殻を高圧岩 (エコロギット) に変えます.
- 既存のテクトン熱模型は,これらの岩石から得られた地質学同位体データと矛盾しています.
- 矛盾は,加厚した地殻における熱平衡の仮定から生じる.
研究 の 目的:
- 構造熱モデルと地質学・同位体データとの不一致を調和させるため.
- オロゲンサイクルと関連する変形現象の持続時間を制限するために.
- 衝突時の地殻進化の非安定状態モデルを開発する.
主な方法:
- 40Ar-39Arのジオクロノロジーを利用しました.
- 熱モデリングに従事.
- メタモルフィックの時間スケールを分析するために,熱モデルと統合されたジオクロノロジカルデータ.
主要な成果:
- 13 Myr未満に制限されたオロジェニックサイクル.
- メタモルフィックイベントは,約20kyr.まで続くと決定されました.
- 個々の熱パルスは10年ほど短いと判明した.
- 断面地帯に沿った熱い流体による急速な地形構造プロセスと一時的な熱誘導の証拠.
結論:
- 短い時間軸は,地震現象と関連している可能性のある急速な地形構造のプロセスを示しています.
- シャーゾーンにおける熱い流体による一時的な熱誘導は,急速な加熱を説明する.
- 非安定状態の冷凍地殻モデルは,平衡モデルよりも地質学的観測をよりよく説明します.
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