50kmの水熱充電と放電は,若いの側面の海底山によって導かれています
A T Fisher1, E E Davis, M Hutnak
1Earth Sciences Department, University of California, Santa Cruz, California 95064, USA. afisher@es.ucsc.edu
Nature
|February 7, 2003
まとめ
海底の水熱循環は,プレート冷却エネルギーと地球温暖化の流れに不可欠であり,地下層の露出によって促進されます. これらの突起は,堆積物を通して流体輸送を可能にし,海殻から海への熱の移転を説明します.
科学分野:
- 海洋地質学 海洋地質学
- 海洋学 海洋学とは
- 地質物理学 地質物理学とは地質物理学です.
背景:
- 海底の熱水循環は,プレート冷却と地球温暖化異常からのエネルギー放出を大きく説明する.
- 海洋熱水流体は,特に若いプレートでは,石層からかなりの熱を除去することが知られている.
- 水熱流体経由で地殻から海洋への熱輸送のメカニズムは,海底の浸透性のない堆積物のために説明することは困難でした.
研究 の 目的:
- 海底の地質学的特徴が,水熱循環を促進する役割を調査する.
- 水熱流体の熱を沈殿物で覆われた海洋地殻を通して輸送する方法を理解するために.
- 熱水流体の流れを誘導する特定の地質構造を特定する.
主な方法:
- 海底のスワッドマッピング.
- 熱流量測定 熱流量測定 熱流量測定 熱流量測定
- 液体の地球化学分析.
- 地震調査. 地震調査.
- フアン・デ・フカ山脈の東側からのデータの分析.
主要な成果:
- 厚い沈殿物を貫通する孤立した地下層の突起が,重要な特徴として特定されました.
- これらの突起は,導管として機能し,水熱流体の放出と再充電を50kmを超える距離に導きます.
- 明確な海底熱パターンが観察され,露出地付近の流体充填と放出場所と相関していました.
結論:
- 海洋の石層を通しての水熱循環と熱輸送は,地下の浮き地によって効果的に媒介することができます.
- この循環機構は,圧力差と地殻の特性によって維持され,独立した研究によって支持されています.
- 底層の露出は,厚い堆積物の下でも,海洋の地殻から海への効率的な熱伝達の実行可能な説明を提供します.
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