Mark Fox writes: > In theory then, a collision-formed stream of Pribrams > with an occasional Neuschwanstein in it "is" possible. > It would be splendid to know if any brecciation > (including clasts) exist in Neuschwanstein or > Pribram, as that may give credence to the asteroid > impact possibility.
The classification of Neuschwanstein as E6 is certainly puzzling. But the very different class of two meteorites (Pribram H5, Neuschwanstein E6) coming from the same orbit might indicate a "rubble pile" asteroid as the source. Observations with radar and spacecraft have indicated rubble pile asteroids before. It's probably safe to say that such rubble piles are made up of rocks coming from different sources (planetesimals). So, maybe Pribram and Neuschwanstein were formed on/in different planetesimals in the early solar system, and were only later mixed ito one rubble pile asteroid. Finally, they were ejected from that asteroid into an Earth-crossing orbit. Note that there is the possibility of soft collisions among small bodies, so a rubble pile of H and E material is still a possibility, even if there are not heavily brecciated and if there are no E-clasts in Pribram or H-clasts in Neuschwanstein. I admit that, even in a rubble pile asteroid, we probably would expect on class of material to dominate over others. The chances that we get two completely fifferent meteorites from the same rubble pile asteroid are probably small, but maybe it's only a first hint on how complex the history of the asteroid belt and the meteorite parent bodies really is...? Hopefully, further research (e.g., CRE ages, O-isotopes) will shed more light on the relation between Pribram and Neuschwanstein... Best greetings, Herbert Raab ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
