Beryllium-boron and aluminum-magnesium chronology of calcium-aluminum-rich inclusions in CV chondrites

Details Beryllium-boron and aluminum-magnesium chronology of calcium-aluminum-rich inclusions in CV chondrites Beryllium-boron and aluminum-magnesium chronology of calcium-aluminum-rich inclusions in CV chondrites

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001m%26ps...36.1397s&link_type=abstract

Meteoritics & Planetary Science, vol. 36, no. 10, pp. 1397-1408 (2001)

Computer Science

28

Scientific paper

We have made Be-B measurements in six calcium-aluminum-rich inclusions (CAIs) (mostly type B inclusions) from CV chondrites and compared them to Al-Mg measurements. All CAIs show 10-B excesses in melilite that are correlated with Be/B ratios. The initial 10-Be/9-Be ratio inferred from the correlation line is 6.2 x 10-4. In contrast to the Be-B system in melilite, the Al-Mg system in anorthite is disturbed. This is probably due to B diffusion in melilite being slow compared with Mg diffusion in anorthite. This suggests that Be-B chronology may be useful for measuring time differences of high-temperature (melting, condensation, etc.) events in the early solar system.

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