Mathematics – Logic
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981geokh.....1113f&link_type=abstract
Geokhimiia, Aug. 1981, p. 1113-1122. In Russian.
Mathematics
Logic
Chemical Composition, Chondrites, Metal Crystals, Meteoritic Composition, Meteoritic Microstructures, Cobalt, Grain Boundaries, Nickel, Particle Size Distribution, Petrology
Scientific paper
In order to investigate the origin of the metal phase in ordinary chondrites, a granulometric analysis of the metal phase from 12 chondrites of the H and L groups of various petrological types is carried out. In addition, the content of nickel and cobalt in certain fractions is determined on the basis of the size of the metal grains, and the morphology and structure of the grains are studied. Histograms giving the size distribution of metal grains for chondrites of the L and H groups are found to be bimodal in the case of the fourth, fifth, and sixth petrological types and monomodal in the case of the third type. The content of nickel and cobalt in the grains is found to depend on the size of the grains and on the petrological type of the chondrite. The data are seen as supporting the hypothesis that the metal phase has its origin in the parent bodies of chondrites during thermal metamorphism.
Baryshnikova G. V.
Fisenko Anatolii V.
Lavrukhina A. K.
Rukhman G. G.
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