ジュアン・デ・フッカの海中山脊の水熱システムにおける地震による変化
1School of Oceanography, University of Washington, Seattle 98195-7940, USA. johnson@ocean.washington.edu
Nature
|September 23, 2000
まとめ
地震の群れは,深海の熱水噴出孔を変えることができます. 構造的活動により,フアン・デ・フカ山脊線に沿って,大気流体温度と出力が大きく,持続的に上昇した.
科学分野:
- 海洋地質学と地球物理学
- 海洋学 海洋学 海洋学
- 水熱発電システムは,水熱発電システムです.
背景:
- 中洋の山脊の熱水噴出孔は,地震の乱れに反応することが知られており,通常は海底火山活動に関連しています.
- 以前の観測は,火山に関連した地震現象に焦点を当て,非マグマティック,構造的イベントへの反応を研究していないままにしました.
研究 の 目的:
- 非マグマ的,構造的地震群に対する水熱風口システムの反応を調査する.
- テクトニックの地震活動に伴う換気液の温度と出力の変化を測定するために.
主な方法:
- 1999年6月にフアン・デ・フカ山脈のいくつかの熱水噴出口で温度測定を行った.
- 噴出孔の液体の温度を,明らかに構造的起源の地震群の発生前,発生中,発生後に監視した.
- 長期間にわたって流体出力の評価された変化.
主要な成果:
- 噴出孔液の温度は,最初の地震から4〜11日後に上昇し始め,約1ヶ月振動し,より高い値で安定した.
- 液体排出量の10倍の増加が観察され,少なくとも80日間持続しました.
- 熱反応は,山脊の全部分にわたって広がった.
結論:
- 控えめな地質学的な活動は,水熱システムにおいて,重要な,セグメント全体の熱反応を誘発する可能性があります.
- この発見は,過剰な熱と流体の発生源と,その風口生態系への影響に関する疑問を提起している.
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