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
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