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Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 16, 2013
火星の磁気進化と多様性の証拠は,赤外線観測から得られた
P R Christensen1, H Y McSween, J L Bandfield
1Department of Geological Sciences, Arizona State University Tempe, Arizona 85287, USA. phil.christensen@asu.edu
Nature
|July 12, 2005
まとめ
火星の火山岩は,玄武岩から花岩まで驚くべき多様性を示しています. これは,地球に似た複雑な火山の進化とマグマの過程を示し,火星の地殻に関する以前の仮定に異議を唱える.
科学分野:
- 惑星科学 惑星科学
- 地質学 地質学 地質学
- イグネウス Petrology (イグネウス・ペトロロジー) とは,イグネウス・ペトロロジー (イグネウス・ペトロロジー) とは
背景:
- 火星の地殻は主に玄武岩と考えられています.
- 以前の構成マッピングでは,細かいスケールの岩石の多様性を明らかにする解像度が欠けていました.
研究 の 目的:
- 火星の岩性物質の組成の多様性を調査する.
- 火星の火山とマグマの進化を理解するために.
主な方法:
- 100メートルスケールのマーズ・オデッセイ熱放出イメージングシステム (THEMIS) のデータを用いて,火星の組成的なマッピング.
- バサルト,ダサイト,グラニトイドを含む岩性岩組成の分析.
主要な成果:
- 低シリカベザルトから高シリカダシート,クォーツを含む花岩石まで,様々な火性物質が特定されました.
- 分割結晶化の証拠により,ダサイトのようなラバが進化した.
- オリビンの玄武岩は,様々な深さで見つかっており,火星の地殻形成全体に広く配置されていることを示唆しています.
- グレニトイド岩の発見は,極端なマグマ的分化を示しています.
結論:
- 火星の地殻は,ピクリト基岩から花岩まで,地球のものと同様の構成範囲を示しています.
- 火星の火山の進化は,これまで考えられていたよりも複雑で,重要なマグマの差異化が含まれています.
- ウルトラマフィック (ピクリティック) バサルトは,現在推定されているよりも,火星でより一般的かもしれない.
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