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Re: Type 3 chondrules
I was told by the person who did the analysis on DaG 313 and 319 that the black
fragments within 313 are carbonaceous...
Matt
Martin Horejsi wrote:
> Bernd wrote:
> >Rolf also has quite an interesting photograph of DaG 313 nicely showing
> >what Martin painstakingly described.
>
> >Here is the URL: http://www.meteorite.ch/dag016.jpg
>
> Thank you for the link Bernd. While the above link shows a slice of the
> chondrite providing some detail of the overall chondrule size and density,
> the picture I offer is a detailed closeup showing a region of about 2cm by
> 1cm in area. When I first looked at the slice, I tried to wipe off the
> little fragment thinking something was stuck to the surface of the specimen.
>
> Looking at the slice in my picture, I wonder how a broken fragment could
> mesh into a chondrite region which has avoided most metamorphic processes.
> Assuming the material was brought together at about the same time, and then
> suffered the same trials afterwards, how could such perfectly formed
> chondrules be mixed with such unweathered rock fragments unless the
> fragments were floating around in the chondrule mix before it solidified
> (or turned to stone however chondrites do it).
>
> Are there other explainations for such a heterogeneous mixture in an
> otherwise chondrule packed meteorite? This does not look like brecciation,
> more like someone dropped a spoon into the dough, and went ahead and baked
> the bread anyway.
>
> Martin
--
Matt Morgan
Mile High Meteorites
http://www.mhmeteorites.com
P.O.Box 151293
Lakewood, CO 80215-9293
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