Hello Pete, I'm not as well-versed in the science of such things as many on the list, but I would point out that there are many multi-kg specimens of Brenham that are composed entirely of iron. Other good examples of similar features occurring in meteorites including, but not limited to, Seymchan, initially mis-classified as a IIE iron because no olivine was observed in the first pieces discovered, as well as the Glorieta Mountain pallasite - the main mass was, from what I've heard, was 100% nickel-iron, with some troilite and schreibersite inclusions.
Well, have a look: http://www.nyrockman.com/auction-2008/lots/seymchan3376g.htm http://www.meteoritefinder.com/catalog/glorieta-col-947.htm http://www.meteoritefinder.com/collection/glorieta-101.7.htm http://www.meteoritefinder.com/collection/glorieta-175.6.htm To that end, I believe it's safe to say that the spacing of the olivine crystals has noting to do with distance from the core. Regards, Jason On Tue, Sep 8, 2009 at 8:26 PM, Pete Shugar<pshu...@clearwire.net> wrote: > Hello list, > I have a question. > I have a piece of Brenham, Ks. It has very slim metal dividers that seperate > the Olivine crystal pockets. > There are other Pallasites that have much thicker metal dividers with > smaller > Olivine pockets. > The question----would the former be formed further from the core than the > latter? > In other words, are there differences in the Olivine/Ni-Fe ratio if the > meteorite > comes from the area closer to the core or further away from the core per a > cubic > meter quantity of each. > Pete IMCA 1733 > > > ______________________________________________ > http://www.meteoritecentral.com > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
