マントルの羽根に浮かぶ原始的な貴金属ガスの性質
1Universite Denis Diderot-Paris 7, Laboratoire de Geochimie et Cosmochimie, Institut de Physique du Globe de Paris, 4 Place Jussieu, 75252 Paris Cedex 05, France. Monterey Bay Aquarium Research Institute, 7700 Sandholdt Road, Moss Landing,
まとめ
地球の希少なガスは,放射性プラネティシマルから蓄積されたときに獲得された可能性があります. マントルの羽根の原始的なネオンは太陽の起源を示唆し,他のガスは非太陽,大気のようなサインを示している.
科学分野:
- 地質化学 地質化学
- 惑星科学は惑星科学である.
- ノーブルガスの地化学
背景:
- ハワイやアイスランドにあるようなマントルの羽根は,地球の深い内部を理解するために不可欠です.
- 高貴ガスの同位体組成は,惑星物質の起源と進化の洞察を提供します.
研究 の 目的:
- ハワイとアイスランドのマントルの羽根に含まれる高貴ガスの同位体組成を調べるために.
- 地球の希少ガス在庫の起源と,太陽と隕石の成分との関係を決定する.
主な方法:
- 高精度の高貴ガス質量スペクトロメトリを用いてネオン,アルゴン,クリプトン,クセノンの同位体を分析した.
- 同位体データを太陽,隕石,大気成分と比較した.
主要な成果:
- ノーブルガスのデータは,ハワイとアイスランドのマントルの羽根に独特の原始的なネオンを明らかにし,太陽型の原始成分を持っています.
- アルゴン,クリプトン,クセノンの非放射性同位体は,非太陽組成を示し,大気のような指紋を示しています.
- この発見は,地球の太陽型希少ガスの在庫は,照射されたプラネティシマルから蓄積されたときに獲得されたことを示唆しています.
結論:
- 地球の希少ガスの在庫は,太陽風が照射した惑星質の蓄積から発生した可能性が高い.
- 太陽光と非太陽光の両方の貴金属ガスの成分の存在は,複雑な蓄積と分化プロセスを示している.
- マントル貴気体は,潜水による最近の大気汚染の証拠を示さない.
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