オーストラリアの白亜紀の垂直運動とオーストラリア・南極の不一致
1M. Gurnis is at the Seismological Laboratory, California Institute of Technology, Pasadena, CA 91125, USA. E-mail: gurnis@caltech.edu. R. D. Muller is in the Department of Geology and Geophysics, University of Sydney, Sydney, NSW 2006, Austra.
まとめ
プレート構造の歴史を組み込んだ3Dマントルのコンベクションモデルは,オーストラリアの白亜紀の垂直運動とオーストラリア・南極不協和の現在の地化学を説明しています. これは,オーストラリアの下にある沈殿した板が,現在上昇していることを示唆しています.
科学分野:
- 地質物理学 地質物理学とは地質物理学です.
- ジオダイナミクスは地力学です.
- プレート・テクトニクス (プレート・テクトニクス)
背景:
- マントルのコンベクションを理解することは,地球の地質の歴史を解釈する上で極めて重要です.
- オーストラリア・南極不一致は,独特の地球化学的および地球物理的特徴を示しています.
- 以前のモデルでは,これらの異常が構造構造の歴史に関連して完全に説明できませんでした.
研究 の 目的:
- マントルのコンベクションダイナミクスをモデル化するために.
- オーストラリアの白亜紀の垂直運動の起源を調査するために.
- オーストラリア・南極不一致の現在の地化学と地物理学を説明するために.
主な方法:
- マントルのコンベクションの3次元モデルを開発した.
- プレート構造の既知の歴史をモデルに押し付けました.
- 垂直運動と地化学/地物理のシグネチャーに関するモデルの予測を分析した.
主要な成果:
- このモデルは,オーストラリアの異常な白亜紀の垂直運動をうまく予測した.
- このモデルは,オーストラリア・南極不一致の特徴的な現在の地化学と地物理学を説明しています.
- クレタチウム時代にオーストラリアの下の沈殿したスラブを推論した.
結論:
- ゴンドワナランド・パシフィック・マージンから発生した沈殿した板が,マントルの移行地帯に停滞した.
- このスラブは現在,東南インド山脈の影響を受けています.
- このモデルは,観測された地質学的特徴のダイナミックな説明を提供します.
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