Jeff and Jason kindly wrote: Thanks so much for that thorough and very interesting summary Bernd. Indeed - thanks, Bernd for the informative post.
My pleasure, folks! Hutchison mentions something that may be of interest in this context: HUTCHISON R. (2004) Meteorites: A Petrologic, Chemical, and Isotopic Synthesis (Cambridge Planetary Science Series, pp. 506, p. 256): It is likely that the winonaites cooled faster than the silicates in IAB irons, which may have been more deeply buried. This is supported by the metallo- graphic cooling rates of Winona, 200°C/Myr, and IAB irons, 10-50°C/Myr. So, maybe these metallographic cooling rates can help make a clear(er) distinction between the two: Silicated IAB's and winonaites. Cheers and best wishes, Bernd To: [email protected] [email protected] [email protected] ______________________________________________ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
