[meteorite-list] Chelyabinsk - cosmic-ray exposure age
karmaka
karmaka-meteorites at t-online.de
Tue Mar 19 12:17:27 EDT 2013
Or could it be that the radioisotopic chronometer was reset by the second mentioned shock event and
the actual cosmic-ray exposure age is much younger?
Von: "karmaka" <karmaka-meteorites at t-online.de>
An: "met-list" <meteorite-list at meteoritecentral.com>
Betreff: [meteorite-list] Chelyabinsk - cosmic-ray exposure age
Datum: Tue, 19 Mar 2013 16:56:40 +0100
Dear list members,
according to ITAR-TASS the cosmic-ray exposure or ejection age of Chelyabinsk is reported to be
289 million years, which seems very, very high for a chondrite. Can this be?
Are there other chondrites with such a high exposure age or is this a typo and it is rather 28.9 million years?
http://translate.google.de/translate?sl=ru&tl=en&js=n&prev=_t&hl=de&ie=UTF-8&eotf=1&u=http%3A%2F%2Fwww.itar-tass.com%2Fc9%2F680067.html
What do you think?
Martin
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