Carbon Raman Spectroscopy of 36 Interplanetary Dust Particles
Carbon Raman spectroscopy is a useful tool to determine the degree of order of organic material (OM) in extra-terrestrial matter. As shown for meteoritic OM [e.g., 2], peak parameters of D and G bands are a measure of thermal alteration, causing graphitization (order), and amorphization, e.g. during protoplanetary irradiation, causing disorder. Th e most pristine interplanetary dust particles (IDPs) may come from comets. However, their exact provenance is unknown. IDP collection during Earth?s passage through comet Grigg-Skjellerup?s dust stream ("GSC" collectors) may increase the probability of collecting fresh IDPs from a known, cometary source. We used Raman spectroscopy to compare 21 GSC-IDPs with 15 IDPs collected at different periods, and found that the variation among GSC-IDPs is larger than among non-GSC IDPs, with the most primitive IDPs being mostly GSC-IDPs.
Presented at the 72nd Annual Meeting of the Meteoritical Society, abstract number 5412.
Physics and Astronomy
Meteoritics and Planetary Science
H. Busemann, L.R. Nittler, J. Davidson, I.A. Franchi, S. Messenger, K. Nakamura-Messenger, R.L. Palma, and R.O. Pepin, 2009. Carbon Raman Spectroscopy of 36 Interplanetary Dust Particles. Meteoritics and Planetary Science 44, A46.
Publisher's Copyright and Source
Copyright © 2009 The Meteoritical Society. Article published by the Meteoritical Society in Meteoritics and Planetary Science, volume 44, issue number S7, July 2009, page A46. Available online on January 26, 2010: