ヨーロッパのサイクロイド構造の形成
G V Hoppa1, B R Tufts, R Greenberg
1Lunar and Planetary Laboratory, 1629 East University Boulevard, University of Arizona, Tucson, AZ 85721-0092, USA. hoppa@lpl.arizona.edu
Science (New York, N.Y.)
|September 18, 1999
まとめ
ヨーロッパのサイクロイド状のパターンは,潮のストレスによって毎日形成される氷殻の亀裂によって引き起こされる可能性があります. そのためには氷の引力強度が低く,海面下には海底があり,潮が大きく屈折することが必要です.
科学分野:
- 惑星科学は惑星科学である.
- 地質物理学 地質物理学とは地質物理学です.
- 地質学 地質学 地質学
背景:
- サイクロイド状のパターンは,木星の衛星であるヨーロッパに多く見られます.
- これらのパターンは,ストレスと断裂に関連した地質学的プロセスを示唆しています.
研究 の 目的:
- 欧州の氷の表面におけるサイクロイドパターンの形成メカニズムを調査する.
- このようなパターンが発達するために必要な物理的条件を決定する.
主な方法:
- 昼間の潮ストレス変数によるクラック伝播のモデリング.
- 氷殻の張力強さと地下流体層の役割を分析する.
主要な成果:
- サイクロイドパターンは,昼間の潮ストレスサイクルに反応して広がる引力裂け目から形成される可能性があります.
- 亀裂の伝播は,変化する張力場によって決定される曲線経路に従います.
- 各弧形セグメントは,ヨーロッパ1日の間におけるクラークの拡散に対応しています.
結論:
- このモデルでは,ユーロパの氷の Kakuatan tarek dari kerak es haruslah kurang dari 40 kilopascal.
- 氷の下には,亀裂形成に必要な潮振幅を促進するために,かなりの液体層が必要である.
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