تقرير
Do Mesosiderites Reside on 4 VESTA? an Assessment Based on Dawn Grand Data
العنوان: | Do Mesosiderites Reside on 4 VESTA? an Assessment Based on Dawn Grand Data |
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المؤلفون: | Mittlefehldt, D. W, Prettyman, T. H, Reedy, R. C, Beck, A. W, Blewett, D. T, Gaffey, M. J, Lawrence, D. J, McCoy, T. J, McSween, H. Y., Jr, Toplis, J. J |
بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2012. |
سنة النشر: | 2012 |
مصطلحات موضوعية: | Geophysics |
الوصف: | Almost a century ago, simple petrographic observations were used to suggest a close genetic link between eucrites and the silicates in mesosiderites [1]. Mesosiderites are composed of roughly equal proportions of silicates that are very similar in mineralogy and texture to howardites, and Fe, Ni metal (Fig. 1) [2]. This similarity has led some to conclude that mesosiderites come from the howardite, eucrite and diogenite (HED) parent asteroid [3, 4]. Subsequent petrologic study demonstrated a number of differences between mesosiderite silicates and HEDs that are more plausibly explained as requiring separate parent asteroids [5]. However, HEDs and mesosiderites are identical in oxygen isotopic composition, and this has been used to argue for a common parent 4 Vesta [6]. |
نوع الوثيقة: | Report |
اللغة: | English |
URL الوصول: | https://ntrs.nasa.gov/citations/20120001951 |
رقم الأكسشن: | edsnas.20120001951 |
قاعدة البيانات: | NASA Technical Reports |
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