Publication
- Names
-
- E. Quirico
- J. Borg
- P. I. Raynal
- G. Montagnac
- L. d'Hendecourt
- Title
- A micro-Raman survey of 10 IDPs and 6 carbonaceous chondrites
- Abstract
- This paper presents a micro-Raman survey of a set of 10 IDPs and 6 pristine carbonaceous chondrites. The higher sensitivity of the present micro-spectrometers allowed to record a dozen of spectra for each objects, whereas only one was available in previous studies. First, as in previous studies, the first-order carbon bands G and D were the only detected features, superimposed onto a fluorescence background of variable intensity, and the spectral characteristics of these bands point to a very disordered polyaromatic organic matter (OM). Nevertheless, these new data reveal that in IDPs, unlike chondrites, the presence of the Raman bands is not systematic, evidencing a much higher heterogeneity in the spatial distribution or the chemical composition of OM. Second, as a consequence, a single spectrum is not representative of a whole IDP, and the classification previously proposed by Wopenka [ 1988. Raman observations on individual interplanetary dust particules. Earth and Planet. Sci. Lett. 88, 221 - 231.] is no longer tenable. At last, this study shows that the fluorescence signal induced by the laser irradiation mostly originates from OM.
- Keywords
- spectroscopy, Raman micro-spectrometer, Raman spectra, fluorescence spectra, data analysis, band position, band width, band intensity, carbonaceous chondrites, CM chondrites, CI chondrites, CR chondrites, IDPs, meteorite Renazzo, meteorite Murchison, meteorite Cold Bokkeveld, meteorite Alais, meteorite Ivuna, meteorite Orgueil
- Content
- material-matter, spectral data, planetary sciences
- Year
- 2005
- Journal
- Planetary and Space Science
- Volume
- 53
- Number
- 14-15
- Pages
- 1443 - 1448
- Pages number
- 6
- Document type
- article
- Publication state
- published
- Doi
- 10.1016/j.pss.2005.07.009
- Identifiers