| タイトル | Mesosiderites on Vesta: A Hyperspectral VIS-NIR Investigation |
| 本文（外部サイト） | http://hdl.handle.net/2060/20130011106 |
| 著者（英） | Raymond, C. A.; Frigeri, A.; Tosi, F.; Russell, C. T.; Longobardo, A.; Capria, M. T.; Capaccioni, F.; Ammannito, E.; Mittlefehldt, D. W.; Palomba, E.; DeSanctis, M. C.; Zambon, F. |
| 著者所属（英） | NASA Johnson Space Center |
| 発行日 | 2013-03-18 |
| 言語 | eng |
| 内容記述 | The discussion about the mesosiderite origin is an open issue since several years. Mesosiderites are mixtures of silicate mineral fragments or clasts, embedded in a FeNi metal matrix. Silicates are very similar in mineralogy and texture to howardites [1]. This led some scientists to conclude that mesosiderites could come from the same parent parent asteroid of the howardite, eucrite and diogenite (HED) meteorites [2, 3]. Other studies found a number of differences between HEDs and mesosiderite silicates that could be explained only by separate parent asteroids [4]. Recently, high precision oxygen isotope measurements of m esosiderites silicate fraction were found to be isotopically identical to the HEDs, requiring common parent body, i.e. 4 Vesta [5]. Another important element in favor of a common origin was given by the identification of a centimeter-sized mesosiderite clast in a howardite (Dar al Gani 779): a metal-rich inclusion with fragments of olivine, anorthite, and orthopyroxene plus minor amounts of chromite, tridymite, and troilite [6]. The Dawn mission with its instruments, the Infrared Mapping Spectrometer (VIR) [7], the Framing Camera [8] and the Gamma-Ray and Neutron Detector (GRaND) [9] confirmed that Vesta has a composition fully compatible with HED meteorites [10]. We investigate here the possibility to discern mesosiderite rich locations on the surface of Vesta by means of hyperspectral IR images. |
| NASA分類 | Geophysics |
| レポートNO | JSC-CN-28140 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
|
