Noble gases in meteorites

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Noble gases in meteorites
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Microdistribution clues on nebular processes
some of the volatile- poor chondrules retain
traces of noble gases chondrule rims noble
gas-rich rims did form in nebula, not on parent
bodies ....
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He and Ne in single presolar SiC grains
AGB
Supernovae
Novae
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He and Ne in single presolar SiC grains
4He (cc/g)
22Ne (cc/g)
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Cosmic-ray produced noble gases How long do
meteorites travel in interplanetary space?
normally tens of millions of years
fossil meteorites in 480 Ma old sediments from
very large collision in asteroid belt arrived
within 105 - 106 years
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Interstellar He trapped on MIR