Mathematics – Logic
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992geokh...5..698l&link_type=abstract
Geokhimiia (ISSN 0016-7525), no. 5, May 1992, p. 698-707. In Russian.
Mathematics
Logic
Chondrites, Interplanetary Dust, Interstellar Matter, Mineralogy, Solar System Evolution, Helium Isotopes, Hydrogen Isotopes, Neon Isotopes, Nitrogen Isotopes, Oxygen Isotopes, Protoplanets, Vapor Phases
Scientific paper
The source of interplanetary chondritic dust particles (IDPs) is discussed. It is pointed out that structural and mineralogical features of IDPs (such as the presence of the minerals formed directly from gas phase; the Raman, IR, and luminescence spectra; and isotope compositions of H, N, O, He, and Ne) are indicative of the formation of these particles in interstellar space. Analyses of the effects of IDP alterations that could have taken place during diagenesis in protoplanetary bodies; the heating, collisions, and radiation in comet cores; and the growth and destruction of interstellar particles in the giant gas-dust cloud (GDC) point to a significant effect of the processes within the GDC caused by changes in the composition and the structure of the ice mantles of the particles. It is concluded that IDPs are representatives of the GDC matter accreting in the outer zones of the solar system, which reach the inner zones system as parts of short-period comets.
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