火星の表面の形態学と組成: 火星オデッセイ THEMISの結果

Philip R Christensen¹, Joshua L Bandfield, James F Bell

¹Department of Geological Sciences, Arizona State University, Tempe, AZ 85287-6305, USA. phil.christensen@asu.edu

Science (New York, N.Y.)

|June 7, 2003

まとめ

火星オデッセイ軌道探査機 (Mars Odyssey orbiter) が発射されました.

科学分野:

惑星科学は惑星科学である.
火星の地質学火星の地質学
リモートセンシング (リモートセンサー)

背景:

Mars OdysseyのTHEMIS装置は,火星の赤外線画像と可視画像を撮影しています.
表面の特徴は,さまざまな地質学的プロセスと,時間とともに環境の変化を明らかにします.

研究の目的:

THEMISデータを用いて火星表面の組成と構造を分析する.
地質学的特徴と,火星の歴史に対するその意味を特定する.

主な方法:

熱放出画像システム (THEMIS) の赤外線と可視波長画像を使用しました.
分析された表面形態学,層の変化,および熱シグネチャー.

主要な成果:

時間的な環境変化を示す石器学的に異なる層を特定した.
観測されたキロメートルのスケールの岩床露出と広範な塵のマントリング.
オリビンに富んだ玄武岩を含む組成の変動が検出されました.
北極帽のクレーターや一時的な水のパッチの周りに,熱的に独特のエジェクタファシーを発見しました.

結論:

火星の表面は,重要な地質的な多様性と,過去の環境のダイナミズムの証拠を示しています.
THEMISのデータは,火星の地質学的進化と表面プロセスに関する重要な洞察を提供します.

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