Abstract
seem to have a different cooling history from the host chondrule itself. The sizes of these inclusions vary from 1 to 30 km. Three different micro-analytical instruments were used to investigate these glass inclusions in the Allende meteorite. 1) An electron microprobe to determine the low Z elements, present in a relatively high concentration. 2) A proton microprobe, to determine low concentrations of elements with Z > 19, using micro-PIXE. 3) A micro-Raman spectrometer, to investigate the presence and the ordering of carbon in the inclusions, because this element is particularly sensitive to the temperature of solidification. From the measurements it was concluded that the glass inclusions did form after the crystallization of the chondrules out of a residual melt and not by recrystallization of part of the chondrules as shown by the different chemical composition. The abundance of carbon is not very well understood up to now, and we will invstiqate more meteorites to improve the data base available, in order to collect more evidence for the present cooling model.
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