I suppose that ultimately this may all go back to whether or not Jupiter occupied its current orbit before the LPBE (Late Period Bombarment Event) - my guess is that it did not.
ep --- Herbert Raab <[EMAIL PROTECTED]> wrote: > > 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 __________________________________________________ Do you Yahoo!? New DSL Internet Access from SBC & Yahoo! http://sbc.yahoo.com ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
