Wrangellia flood basalt (ワランゲリアの洪水ベースルト) と他の海洋高原のマントルプルーム開始モデル
まとめ
ランジェリア・テラネ (Wrangellia terrane) とは
科学分野:
- 地質学 地質学 地質学
- プレート・テクトニクス (プレート・テクトニクス)
- 火山学 火山学とは
背景:
- アラスカとブリティッシュ・コロンビアのワレンゲリア・テラネは,大面積の海洋高原である.
- トリアス期の層は,海洋の堆積岩の間に埋め込まれた洪水ベースルト (3-6 km) の厚い配列を明らかにしています.
研究 の 目的:
- ワレンゲリア・テラネの洪水ベースルトの形成過程を調査する.
- マントルの羽根ヘッドモデルの海洋高原形成への適用性をテストするために.
主な方法:
- ランゲリア・テラネのトリアス層の地質学的分析.
- ランジェリアの地質学的歴史の比較とマントルの羽根開始のモデル.
主要な成果:
- ランジェリア・テラネは,500万年以内に急速な上昇と大規模なベースルト噴火を経験し,その後沈み込みました.
- この配列は,大陸の洪水火山活動に対するマントルプルーム開始モデルの予測と一致しています.
- 同様の形成過程は,オントン・ジャワやケルゲレンなどの他の海洋高原にも示唆されています.
結論:
- マントルの羽根の開始は,大規模な海洋高原の急速な形成のための実行可能なモデルを提供します.
- これらの出来事は,海洋と大陸の両方の地殻の発展において重要である.
- ランジェリア・テラーネは,羽根駆動による海洋高原形成の重要な例として機能します.
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