Chemical compositions of refractory inclusions from the Vigarano and Leoville carbonaceous chondrites

Details Chemical compositions of refractory inclusions from the Vigarano and Leoville carbonaceous chondrites Chemical compositions of refractory inclusions from the Vigarano and Leoville carbonaceous chondrites

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54.2121m&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 54, July 1990, p. 2121-2132. Research supported by the University of Chic

Computer Science

11

Allende Meteorite, Carbonaceous Chondrites, Chemical Composition, Meteoritic Composition, Refractory Materials, Trace Elements, Grain Size, Inclusions, Solar Corona, Solar System

Scientific paper

The contents of the major and the trace elements of three refractory inclusions from Leoville and two hibonite-rich refractory inclusions and a dark clast from Vigarano were investigated using INAA technique, and the results were compared with results reported for an Allende inclusion. It was found that two out of the three refractory inclusions from Leoville and both inclusions from Vigarano have lower Na and Au contents than the coarse-grained inclusion from Allende. It is shown that the concentrations of all volatile elements in refractory inclusions in the Leoville and Vigarano meteorites tend to be either below or at the low end of their concentration ranges in Allende coarse-grained inclusions. This is considered to be due to the fact that the former were altered in parts of the solar nebula where grain-bias separation processes removed the inclusions from chemical communication with the gas at a higher temperature or after a shorter time than for the inclusions from Allende.

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