シノロジェニックの崩壊: 中央の地殻,プロテロゾイク・グレンヴィル・オロゲンからの視点
Science (New York, N.Y.)
|November 1, 1991
まとめ
グレンヴィル・オロゲンの主要な拡張欠陥は,推力によって発達し,レオ学的限界を超えたために地殻の崩壊を示しています. このプロテロゾイク期の出来事は,ヒマラヤの現代のオロジェニックプロセスを反映しています.
科学分野:
- 地質学 地質学 地質学
- テクトニクス (地質学) とは
- 構造地質学 構造地質学
背景:
- カナダのオンタリオ州にあるグレンヴィル・オロゲンは,中期から後期までのプロテロゾーイク時代の構造活動の鍵となる窓を提供する.
- 断層と変形を含むオロゲン学的過程を理解することは,地球の地質史を再構築するために極めて重要です.
研究 の 目的:
- グレンビル・オロゲンの構造的,地質学的,地質学的進化を調査する.
- オーロゲネシス中の拡張的断層,突入,および変形の間の関係を決定する.
- プロテロゾイク期のオロジェニックプロセスを,ヒマラヤのような近代的な例と比較する.
主な方法:
- 岩層の構造分析. 岩層の構造分析. 岩層の構造分析.
- 岩石のサンプルを Petrological 検査する.
- タイムラインを確立するためのジオクロノロジック年代測定.
主要な成果:
- グレンヴィルのオルゲンにおける後期的な推進と並行して,重要な拡張欠陥が開始されました.
- この断層は地殻内で少なくとも25キロの深さまで広がっていた.
- 断層,変形,圧縮のタイミングと空間的分布は,地殻の過厚化とそれに続く崩壊を示唆しています.
結論:
- シノロジェニック崩壊は,地殻がレオロジカルサポート能力を超えたことによって引き起こされた.
- グレンヴィルのようなプロテロゾイクオロジェニックベルトは,生理学的高さ,地殻の厚さ,強さにおいて,ヒマラヤのような近代的なオロジェニックシステムとの類似性を共有していた.
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