火星のジェゼロクレーターの床から採取した水性変化した岩石
K A Farley1, K M Stack2, D L Shuster3
1Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.
まとめ
火星のジェゼロクレーターの床に 水によって変化した岩石を発見しました オリヴィンに富んだセイタと マアスの溶岩流を含むこれらの岩は,惑星の水のある過去へのヒントを提供します.
科学分野:
- 惑星科学
- 地質学
- 天体生物学
背景:
- 火星のジェゼロクレーターにある古代の湖と川の埋蔵物を探査することを目的としています.
- ジェゼロクレーターの地質学的な歴史を理解することは 過去の居住可能性の評価に不可欠です
研究 の 目的:
- ジェゼロクレーター底の岩の構成と起源を調査する
- 古代の火星の岩の変化における 水の役割を調べるため
主な方法:
- パーセヴァランス・ローバーによる 現場観測と分析
- 岩の単位 (セイタとマアズ) の地質学的解釈とその鉱物学.
- 炭酸塩,硫酸塩,酸塩を含む鉱物学的データの分析
主要な成果:
- ジェゼロクレーターの床は,当初予想されていたデルタの下の堆積物ではなく,火山岩で構成されています.
- セイタはオリヴィンに富んだ岩石で,マグマから形成されたことを示している.
- マアズ単位は,溶岩流または層状の岩体の一部として解釈され,後に水によって変化し,硫酸塩および高塩酸塩を導入します.
結論:
- ジェゼロクレーター床の岩は,火山活動と重要な水岩相互作用の証拠を提供します.
- この発見はクレーターの地質学的な歴史に関する 以前の仮定に異議を唱え 複雑な水性過程を強調しています
- 採取したコアサンプルは 詳細な分析のために将来地球へのサンプル帰還ミッションの可能性を秘めています
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