Diogenite exposure ages |
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| Authors: | GF Herzog PJ Cressy |
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| Institution: | 2. Department of Earth and Space Science, State University of New York, Stony Brook N.Y. 11790, U.S.A. |
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| Abstract: | He, Ne and Ar isotopes have been measured in six, and 26Al in two diogenites. Cosmic-ray exposure ages corrected for shielding effects using 22Ne/21Ne ratios are generally concordant. Five diogenites have a group age of 14 Myr and three others may have a group age of 24 Myr, implying that two collisions may have produced 8 of the 9 diogenites. |
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