オポルチニティのモスバウアースペクトロメーターからのメリディアン平面のジャロサイトとヘマタイト
G Klingelhöfer1, R V Morris, B Bernhardt
1Institut für Anorganische und Analytische Chemie, Johannes Gutenberg-Universität, Staudinger Weg 9, D-55128 Mainz, Germany. phil.christensen@asu.edu
Science (New York, N.Y.)
|December 4, 2004
まとめ
モスバウアースペクトルはジャロサイトを明らかにし,火星の過去の水性プロセスを示した. この発見は,Meridiani Planumの古代の水活動に関する重要な鉱物学的証拠を提供します.
科学分野:
- 惑星科学は惑星科学である.
- ミネラロジーは,鉱物学です.
- 天体生物学 アストロバイオロジー
背景:
- 火星のMeridiani Planumは,過去の居住性を研究するための重要な地域です.
- 火星の土壌と岩石の鉱物学を理解することは,地質学の歴史を解釈する上で極めて重要です.
研究 の 目的:
- オポチュニティ・ローバーからのデータを用いて,メリディアニ・プランウムにおける鉱物学的成分を特定する.
- 火星の過去の水性プロセスに対する鉱物発見の影響を調査する.
主な方法:
- オポチュニティローバーによって得られたモスバウアースペクトルの分析.
- ジャロサイト,ヘマタイト,オリビン,ピロキセンを含む鉱物学的成分を特定する.
主要な成果:
- 4つの異なる鉱物学的成分が特定されました:ジャロサイトとヘマチットに富んだ露出地,ヘマチットに富んだ土壌,オリビンを含んだ玄武岩土,そしてピロキセンを含んだ玄武岩 (Bounce rock).
- 凝固物として解釈されるヘマチットに富んだ球粒は,土壌や露出地で一般的であった.
- 水酸化硫酸鉱物であるジャロサイトの存在が確認されました.
結論:
- ジャロサイトの発見は,火星の過去の水性プロセスに関する直接的な鉱物学的証拠を提供します.
- これらの水性プロセスは,Meridiani Planumの酸硫酸条件下で発生した可能性がある.
- 多様な鉱物学は,研究された地域の複雑な地質学と環境の歴史を示唆しています.
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