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Towards calibrating the vestan regolith: correlating the petrology, chemistry and spectroscopy of howardites
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Di Iorio, T. Pieters, C. M. De Sanctis, C. Ammannito, E. Mittlefehldt, D. W. De Angelis, S. Hiroi, T. |
| Copyright Year | 2013 |
| Description | The Dawn spacecraft carries a visible and infrared mapping spectrometer (VIR) [1] that has acquired spectra for the wavelength range 0.25-5.0 μm at various spatial resolutions covering much of the vestan surface [2]. Through comparison of VIR spectra with laboratory spectra of howardite, eucrite and diogenite meteorites, the distribution of more diogenite-rich and more eucrite-rich terranes on Vesta have been mapped [3], but these maps are qualitative in nature. The available laboratory spectra are not well-integrated with detailed sample petrology or composition limiting their utility for lithologic mapping. Importantly, howardites are now recognized to come in two subtypes, regolithic and fragmental [4]. The former are breccias assembled in part from true regolith, while the latter have had much less exposure to the space environment. We are attempting to develop a more quantitative basis for mapping the distribution of lithologic types on Vesta through acquiring laboratory spectra on splits of howardites that have been petrologically and chemically characterized [5]. Noble gas analyses have been done on some allowing identification of those howardites that have been exposed in the true regolith of Vesta [6]. |
| File Size | 34493 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140000331 |
| Archival Resource Key | ark:/13960/t6062jr74 |
| Language | English |
| Publisher Date | 2013-07-29 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Petrology Vesta Asteroid Aerospace Environments Thematic Mapping Infrared Spectrometers Calibrating Meteoritic Composition Regolith Breccia Achondrites Rare Gases Infrared Imagery Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
