Other
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995lpi....26..639h&link_type=abstract
Abstracts of the Lunar and Planetary Science Conference, volume 26, page 639, (1995)
Other
Regolith, Gas Flow, Chondrites, Volatility, Flow Velocity, Aluminum Isotopes, Water Vapor, Fluid Mechanics
Scientific paper
We have previously shown that size and density sorting in a regolith which has been 'fluidized' by the passage or gases from the interior or the body can quantitatively explain metal-silicate fractionation, an important property of ordinary chondrites. Here we discuss whether the flow rates and flux or volatiles expected from a primitive parent body are likely to be sufficient for this mechanism. Many meteorite parent bodies may have contained volatiles. From a consideration of heat diffusion and fluid mechanics, we calculate the gas flow rate of volatiles (e.g., water) in the regolith of an asteroid-sized object heated by Al-26. Our calculations show that the flow velocities and flux of water vapor are sufficient to produce conditions suitable for fluidization. Other heat sources have yet to be considered, but literature work suggests that they may be equally effective.
Huang Shaoxiong
Sears Derek W. G.
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