コロラド高原のマグマリズムと,異質な石層の温暖化による上昇
Mousumi Roy1, Thomas H Jordan, Joel Pederson
1Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131, USA. mroy@unm.edu
Nature
|June 19, 2009
まとめ
コロラド高原 コロラド高原
科学分野:
- ジオダイナミクスは地力学です.
- テクトニクス (地質学) とは
- プレートウアップリフト (高原の上昇)
背景:
- コロラド高原の岩石の上昇メカニズムについては依然として議論が続いている.
- 隣接する地域とは異なり,大きな内部変形なしに著しい上昇を経験しました.
研究 の 目的:
- コロラド高原の岩石の上昇に関するジオダイナミックモデルを提案し,テストする.
- 平原全体で観測された地質学的および地物理学的コントラストを説明するために.
主な方法:
- リトスフィアの温暖化と伝導性の再均衡のジオダイナミックモデリング.
- セノゾイクマグマティズム侵攻と重力データの分析.
主要な成果:
- ファラロンプレート除去後の石層温暖化は,高原の上昇を促している.
- モデルでは,マグマティズム浸透 (3-6 km/Myr) とマージン地質学的異常が説明されています.
結論:
- コロラド高原のエピロジェニック上昇の主な要因は,ケノゾイク中期後の石層温暖化である.
- このメカニズムは,他のプレート内部設定では潜在的に重要なものです.
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