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Updated: May 11, 2026

06:04
Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 16, 2013
部分的に溶けたペリドチートにナトリウムの急速な拡散性浸透
1Department of Geological Sciences, Brown University, Providence, Rhode Island 02912, USA. lundstro@uiuc.edu
Nature
|February 17, 2000
まとめ
昇降した玄武岩の溶融におけるナトリウム拡散は,ペリドータイトの溶融のダイナミクスに影響を与える. この相互作用は,より高いマントルの温度を必要とせずに,シリカ濃度の高いインクルージョンと異常な融解モードを説明します.
科学分野:
- 地質化学 地質化学
- ペトロロジー・ペトロロジーとは
- 地震学 地震学とは
背景:
- マントルの融解は,相互接続されたネットワークを形成する玄武岩液を生成し,急速な上昇につながります.
- マントルの融解はポリバリックプロセスで,異なる圧力で形成される融解は,異なる化学組成を有する.
- 現在のモデルは,より深い圧力からの溶融と,その上に横たわる固体マントルの間の相互作用をしばしば想定しない.
研究 の 目的:
- 上昇する溶融と周囲の固体マントルの間の相互作用を低圧で調査するために.
- ゼノリットのシリカが豊富なガラスのインクルージョンやアビサルのペリドライトの異常な融解などの地球化学的観測を説明するために.
- リトスフィアの融解とアステノスフィアの上流を増加させるためのメカニズムを提案する.
主な方法:
- 最近の地震学,地化学,実験観察の分析.
- ポリバリクマントルの融解プロセスのモデリング.
- 昇る溶液におけるナトリウム拡散ダイナミクスの調査.
主要な成果:
- 昇降溶液中のナトリウムは,ペリドートマトリックス内の低圧溶液に急速に拡散する.
- この拡散プロセスは,ペリドータイトが溶ける方法を変化させます.
- 提案されたメカニズムは,シリカが豊富なガラスのインクルージョンと,アビスカル・ペリドータイトの異常な融解モードを考慮します.
結論:
- ナトリウム拡散によるメルト-ペリドータイト相互作用は,マントルの融解における重要なプロセスである.
- このプロセスは,より高いマントルの温度を誘発することなく,観測された地化学的異常を説明することができます.
- それは,溶岩層の融解とアステノスフィアの上流を増加させるメカニズムを提供します.
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