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Trace element carrier phases in primitive
chondrite matrix: Implications for volatile element
fractionation in the inner solar system.
Bland P. A., Rost D., Vicenzi E. P., Stadermann F. J.,
Floss C., Fries M., Steele A., Benedix G. K., Lee M. R.,
Watt L. E., and Kearsley A. T. (2005)
Lunar & Planet. Sci. XXXVI, Abstract #1841.
ABSTRACT
Volatile element fractionation was one of the earliest
and most fundamental processes affecting the inner solar
nebula. Solids in the inner Solar System are depleted in
volatile elements compared to solar abundances, with
moderately volatile elements showing a monotonic depletion
in abundance with decreasing condensation temperature.
Models to explain volatile depletion in meteorites and the
terrestrial planets fall into one of four categories: a)
two-component models, with volatile depletion occurring
during chondrule formation, and depleted chondrules being
mixed with primordial, CI-like matrix; b) incomplete
condensation during cooling of a hot inner disk, prior to
chondrule formation; c) evaporative fractionation prior to
chondrule formation; or d) inheritance of a
volatile-depleted signature from the ISM.
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