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Updated: Jul 10, 2026

06:04
Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 15, 2013
地球の深い上層マントルの融解は,二酸化炭素によるものです
Rajdeep Dasgupta1, Marc M Hirschmann
1Department of Geology and Geophysics, University of Minnesota, 310 Pillsbury Drive SE, Minneapolis, Minnesota 55455, USA. dasg0007@umn.edu
Nature
|March 31, 2006
まとめ
炭酸ペリドータイトによって引き起こされる中海の山脊の下の部分的な融解は,以前考えられていたよりも深く起こります. このプロセスは元素の循環とマントルの性質に影響を与え,地球に影響を与えます.
科学分野:
- 地質化学 地質化学
- 地質物理学 地質物理学とは地質物理学です.
- ペトロロジー・ペトロロジーとは
背景:
- 中洋のの下での部分的な融解は,マントルと地殻の要素サイクルとマントルのリオロジーにとって極めて重要です.
- 地質学的データによると,融解は300kmの深さで始まるが,原因は不明である.
研究 の 目的:
- 高圧 (3-10 GPa) で炭酸ペリドチートの固体を調査する.
- 中洋の山脊の下の融解の深さと範囲を決定するために.
- 深層マントルの融解に関連する地球物理学的観測を説明するために.
主な方法:
- 炭酸ペリドチート固体の実験的決定.
- 融解プロセスの熱力学モデリング.
- 実験データの統合と地球物理学的観測.
主要な成果:
- 中洋の山脊の下の融解は,深さ330kmまで発生する可能性があります.
- この深層溶解により,少量の (0.03-0.3%) カルボナイト液体が生成されます.
- これらの溶解は鉱物の再結晶を引き起こし,地質学的異常を説明する可能性がある.
結論:
- 炭酸ペリドータイトの深層マントルの融解は,中海の山脊の下での重要なプロセスです.
- このプロセスは,炭素,ヘリウム,アルゴン,熱を生成する元素を深層マントルから効率的にリサイクルします.
- それは枯渇したマントルの残留物を生み出し,上部マントルの組成とリオロギーを影響する.
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