イオの山の起源は,推力断層と大規模な質量移動によるものです
1P. M. Schenk, Lunar and Planetary Institute, Houston, TX 77058, USA. M. H. Bulmer, Center for Earth and Planetary Science, National Air and Space Museum, Washington, DC 20560, USA.
まとめ
イオのユーベア・モンテス山は,地殻の10.5kmの上昇と傾きによって形成されました. これは,巨大な斜面の故障を引き起こし,太陽系の最大の破片のエプロンの1つを生み出しました.
科学分野:
- 惑星地質学 惑星地質学
- 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:
- 木星の火山の月イオは,ダイナミックな地質学的プロセスを示しています.
- 以前の観測は,Ioの複雑な山の形成メカニズムを示唆していた.
研究 の 目的:
- ヴォイジャー号のステレオ画像を用いて,イオのユーボア・モンテスの形成を分析する.
- イオの山の形成に関わる地質学的プロセスを理解するために.
主な方法:
- ユーボア・モンテスのボイジャーステレオ画像の分析.
- トポグラフィと構造の特徴の地質学的解釈.
主要な成果:
- エウボア・モンテスは10.5km上昇し,6度傾いた.
- 北西側の側面に大規模な斜面障害が発生し,大きな瓦プレートを形成しました.
- 障害は,硬直した石層 (厚さ≥11km) の上に,凝固されていない層 (2km) を含む.
結論:
- イオの山の形成には,深く根付いた推力欠陥とブロック回転が伴う可能性があります.
- 表面の深部での圧縮は,おそらく地殻のリサイクルによるもので,これらのプロセスを駆動する.
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