IXe dating: Evidence for cold assembly of an unequilibrated chondrite

Details IXe dating: Evidence for cold assembly of an unequilibrated chondrite IXe dating: Evidence for cold assembly of an unequilibrated chondrite

Jul 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970e%26psl...8..443p&link_type=abstract

Earth and Planetary Science Letters, Volume 8, Issue 6, p. 443-447.

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6

Scientific paper

Essentially all of the more equilibrated meteorites which contain excess radiogenic129Xe have well-defined IXe formation intervals that apparently date the onset of proportional retention for iodine and radiogenic129Xe from the decay of129I. Precise data on the unequilibrated chondrite Manych, which contains large excesses of129Xe, clearly demonstrates a lack of correlation between the radiogenic129Xe and iodine. Although this effect might be accounted for by other mechanisms, it can also be interpreted as evidence for the cold accretion of constituent parts, some of which may have retained the IXe record of a previous history. Re-examination of data from the unequilibrated chondrites Chainpur and Renazzo tend to support such an interpretation.

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