Computer Science
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.308..172h&link_type=abstract
Nature (ISSN 0028-0836), vol. 308, March 8, 1984, p. 172, 173.
Computer Science
7
Abundance, Boron, Cosmochemistry, Geochemistry, Planetary Evolution, Solar System, Earth Mantle, Inclusions, Meteoritic Composition
Scientific paper
The results of a prompt gamma neutron analysis of the abundance of boron in ultramafic xenoliths from alkali basalts are reported. The detection level of the technique was 0.1 ppm and 25 percent accuracy. The study was performed to interpret the behavior of boron during condensation of the solar nebula and the following evolution of the planetary system. Samples of xenoliths from flows in France, Germany, Austria, and the U.S. were examined as specimens of the uncontaminated fertile mantle. A consistency was found among many elemental abundances. The abundances were equivalent to those predicted by pyrolytic models that indicate boron condensed in solid solution in high temperature phases. It is suggested that boron condensed from the solar nebula at about 1200 K in solid solution in one of the feldspars, but not with the most refractory phases or as a separate phase.
Higgins Michael Denis
Shaw Matthew D.
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