チャンエ6号によって回収された月面のサンプルには28億年前の玄武岩が含まれています
Zexian Cui1, Qing Yang1, Yan-Qiang Zhang1
1State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China.
まとめ
チャン
科学分野:
- 月の地質学と地化学
- 同位体地化学
- 惑星科学
背景:
- 月面の裏側の地質は近辺と異なるもので 岩の組成が異なっています
- カリウム,希土元素,そしてリン (KREEP) は遠方ではあまり多くありません.
- 南極・アイトケン盆地 (SPA) は,月の裏側進化を研究するための重要な地域である.
研究 の 目的:
- Chang'e-6のサンプルを用いて月の南極-アイトケン盆地での火山活動.
- 火山のマグマの地化学的起源を 特定するために
- 月のクレーター年代測定モデルを 精査するためです
主な方法:
- 鉛と鉛とルビジアムとストロンチウムの同位体分析
- ストロンチウム,ネオジミウム,鉛の同位体分析
- 月球のクレーター年代を統合する.
主要な成果:
- SPA盆地における火山活動の正確な年齢は2830 (±5) 百万年であった.
- イソトープの痕跡は 不適合な元素で 枯渇したマグマ源を示しています
- マグマ源にはKREEP成分が ほとんどない
結論:
- SPA流域は28億3千万年前に火山活動を経験した.
- 火山の源は月面マントルの独特の貯水池で,KREEPが豊富な地域とは異なります.
- この発見は,月のマントルの異質性と進化を理解するための重要なデータを提供します.
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