イエローストーン・カルデラの上昇,熱的動乱,マグマの侵入は,イエローストーン・カルデラの上昇,熱的動乱,マグマの侵入です
Charles W Wicks1, Wayne Thatcher, Daniel Dzurisin
1US Geological Survey, MS 977, Menlo Park, California 94555, USA. cwicks@usgs.gov
Nature
|March 3, 2006
まとめ
イエローストーンの新カルデラの表面変形は,衛星レーダーを用いて観測されました. この上昇と沈下パターンは,火山系内のマグマの動きを示唆し,火山の動乱の洞察を提供している.
科学分野:
- 地質学 地質学 地質学
- 火山学 火山学とは
- 地質物理学 地質物理学とは地質物理学です.
背景:
- アメリカ西部の巨大な火山系であるイエローストーン・カルデラは,約64万年前に形成されました.
- それは,1600万年前に遡る一連のカルデラの中で最も若いものです.
- イエローストーンは,継続的な地震活動,上昇/沈下,そして水熱の特徴を示しています.
研究 の 目的:
- イエローストーン火山系における表面変形に関する新しい観測を提示する.
- 先進的なリモートセンシング技術を使用して変形パターンを分析する.
- 表面の変化を誘発する火山の潜在的プロセスを理解する.
主な方法:
- 欧州宇宙機関 (ESA) の ERS-2 衛星からのレーダー干渉測定データを活用した.
- 表面の上昇と沈下のパターンを分析した.
- 火山系の動力学と相関する変形.
主要な成果:
- イエローストーン・カルデラの表面変形の新たな形態を特定した.
- カルデラ全体で上昇と沈没の明確なパターンが観察されました.
- これらのパターンは,溶けた玄武岩の移動と関連しています.
結論:
- 観測された変形は,イエローストーンの火山系内の動的プロセスを示している.
- 溶融玄武岩のシステムへの移動とシステムからの移動が原因であると推論されています.
- この発見は,イエローストーンの動乱とマグマ管道についての理解を深める.
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