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Updated: Jun 10, 2026

06:04
Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 15, 2013
コア・マントルの境界から採取されたダイヤモンドのサンプルを羽根で採取した
Trond H Torsvik1, Kevin Burke, Bernhard Steinberger
1Physics of Geological Processes and Geosciences, University of Oslo, Blindern, 0316 Oslo, Norway. trond.torsvik@ngu.no
Nature
|July 16, 2010
まとめ
ダイヤモンドの主要な源であるキンベルライトの噴火は,深いマントルの構造と関連しています. 将来のダイヤモンド探査は,これらの安定した深層地帯を覆う古代のクレートンに焦点を当てなければなりません.
科学分野:
- 地質学 地質学 地質学
- 地質物理学 地質物理学とは地質物理学です.
- ミネラロジーは,鉱物学です.
背景:
- ダイヤモンドは,地球のマントル (>150 km) の奥深くに形成され,キンベルライトによって表面に持ち出される.
- 古代のクラトン (大陸の石層 >25億年,厚さ >300km) から噴火したキンベルライトは,経済的に有効なダイヤモンド資源の主要な源泉です.
- キンベルライトは,マントルの深い亜大陸マントルの石層とマントルのインターフェースのプロセスについての洞察を提供します.
研究 の 目的:
- キンバーライト噴火分布に関する深層マントルのコントロールを調査するために.
- 将来のダイヤモンド探査を導く地質学的要因を特定する.
主な方法:
- 歴史的な大陸の位置を分析するためにプレート再構築を利用しました.
- 地震トモグラフィ画像を用いて,マントルの深層構造をマッピングした.
- 深いマントルの異質性を持つ相関するキンベルライト分布.
主要な成果:
- 核-マントルの境界で安定した深層マントルの異質性 (>2億年,おそらく5億4000万年) が確認された.
- これらの深いマントルの構造の縁が,ほとんどのファネロゾイクキンベルライト噴火と相関していることが実証されました.
- これらの羽根生成ゾーンを覆う古代のクレートンがキンベルライトの発生の鍵であることを示しました.
結論:
- 深いマントルの構造は,キンバーライト噴火の位置に大きな影響を与えます.
- 将来のキンベルライトとダイヤモンドの探査は,これらの深いマントルの特徴の上に位置する古代のクレートンを持つ大陸をターゲットにすべきである.
- 地球の深層のダイナミクスを理解することは,ダイヤモンド資源の発見に不可欠です.
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