Mathematics – Logic
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994metic..29s.536s&link_type=abstract
Meteoritics (ISSN 0026-1114), vol. 29, no. 4, p. 536-537
Mathematics
Logic
5
Chemical Composition, Chondrites, Dust Collectors, Interplanetary Dust, Mineralogy, Stratosphere, Abundance, Asteroids, Comets, Meteoritic Composition, Scanning Electron Microscopy, Transmission Electron Microscopy
Scientific paper
A stratospheric particle collector, provided by NASA Johnson Space Center, was selected for a comprehensive consortium study to obtain chemical and mineralogical information on an unbiased sample of Interplanetary Dust Particles (IDPs) by various complementary techniques. The purpose is to establish the relative abundances of various particle populations on this collector, to determine characteristics of extraterrestrial chondritic and nonchondritic particles, and to investigate their relation to proposed parent objects. In the initial phase, we decided to investigate all particles on the collection surface, 10 microns or larger in diameter, irrespective of a suspected origin. Of the 321 particles with diameters of 10-135 microns, 102 of them were selected for the first analyses. This set of samples represents all types of particles seen on the collection surface, with respect to size, surface morphology, and color. The first step in a sequence of analyses, which will be applied to all particles, are bulk chemical studies by Scanning Electron Microscopy/Energy Dispersive X-ray Analyzer (SEM-EDX) including C analysis. Subsequent analyses cover IR-spectroscopy, Transmission Electron Microscopy (TEM) studies, Proton Induced X-ray Emission (PIXE), and Synchrotron X-ray Fluorescence (SXRF) measurements. These investigations will deliver data on major-, minor-, and trace-element abundances and their lateral distribution as well as the isotopic composition of some elements, particle densities, mineralogy, and IR-spectral information.
Stephan Thomas
Thomas Kathie L.
Warren John L.
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