Maybe the nakhlites underwent a(nother) high temperature event (collision?) while floating in space. Maybe this event influenced the cosmogenic nuclides of 38Ar in a different way than those of 4He and 21Ne. Maybe one of the radio- genic clocks was thus (partially) reset. I don't know if such a *p a r t i a l* resetting is possible. Maybe this high temperature event led to a preferential loss of argon while the NWA 998 nakhlite was able to retain its amount of radio- genic helium and neon. Nothing to back it up with, ... only guessing.
Bernd ______________________________________________ Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
