Computer Science
Scientific paper
Mar 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28.1453t&link_type=abstract
Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 453.
Computer Science
Chondrule, Chondrites, X Ray Imagery, Allende Meteorite, Computer Aided Tomography, Troilite, High Resolution, Silicates, Meteoritic Composition
Scientific paper
Images of Moorabie (L3), Allende (CV3), and chondrules removed from Allende were obtained by high-resolution X-ray computer tomography (CT) with a spatial resolution of a few mm. Fe-Ni alloy, troilite, and silicates can be distinguished, and chondrules, CAI's, and matrix can be recognized. Many euhedral crystals, probably olivine, were identified in a chondrule, suggesting that the chondrule has a porphyritic texture. In addition to minerals or their assemblages, holes can be also identified, and this shows potential for analyzing primordial solar nebula gas trapped in chondrules. Three-dimensional structures were reconstructed from successive images. In the porphyritic chondrule, the shapes of the holes are irregular three-dimensionally and similar to those formed by viscoelastic fingering. This may suggest that the holes were formed by shrinkage of the melt by solidification.
Hirai Hiroshi
Koishikawa Atsushi
Kondo Michiro
Tsuchiyama Akira
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