チベット高原の地質学的進化について
Leigh H Royden1, B Clark Burchfiel, Robert D van der Hilst
1Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 01890, USA. lhroyden@mit.edu
まとめ
チベット高原はチベット高原です.
科学分野:
- 地質学 地質学 地質学
- テクトニクス (地質学) とは
- プレートテクトニクスのプレート構造は,
背景:
- インドとユーラシアの衝突により,およそ5000万年前,チベット高原の形成が始まりました.
- 西部と中央チベットで地殻の縮小が発生し,石層の断片が西太平洋とインドネシアに向かって押し出されました.
- パシフィック海溝の移動は1500万~200万年前に減速し,断片の挤出に影響を与えた.
研究 の 目的:
- インドとユーラシアの衝突を超えたチベット高原の進化について,より広い地質学的な文脈を提供するため.
- 構造的出来事と高原の構造的発展の関係を調査する.
- 東チベットにおける地表の上昇と地殻の厚まりを促すメカニズムを理解する.
主な方法:
- 地質学的進化と地質学過程の分析.
- 地殻の縮小と石層の断片挤出の解釈.
- パシフィック海溝移動と高原変形の相関.
主要な成果:
- 衝突後,地殻の縮小と石層の挤出が発生した.
- パシフィック海溝の急速な移動の停止は,エクストルージングの減速と一致した.
- 東チベットの急速な地表の上昇と地殻の厚み付けは,深い地殻の東向きの流れの結果でした.
結論:
- チベットの高原の進化は,インド-ユーラシアの衝突を超えたより広範な構造的出来事と関連しています.
- 地震チャネル内の地殻の深い流れは,チベットの東部の上昇と加厚を促している可能性が高い.
- これらのプロセスは,チベットにおける変形に対応する近代的な構造システムへの移行を意味する.
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