Hi Carl, Alan wrote:
> "Please note that volumetrically, the amount of low-Ni metallic Fe is > trivial, far less than 0.1% of a typical chondrite." You replied: > ".1% is a relative term. Earth may be only a fraction of the size of > Artares [Antares] but, it is still a pretty big rock." I don't think you're quite absorbing what Dr. Rubin is saying. There is no natural solar system mechanism that can separate iron from nickel in macroscopic quantities. So if you find a lump of iron on earth that doesn't have nickel in it, it originated here. It is not a question of there being room for reasonable doubt. It simply cannot happen. The physics of nucleosynthesis, cosmochemistry, and entropy do not allow it. Best, Rob ______________________________________________ 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
