---------- Forwarded message ---------- From: ALAN RUBIN <[email protected]> To: Francesco Moser <[email protected]> Cc: Meteoritecentral List <[email protected]> Date: Sun, 28 Jun 2015 13:25:56 -0700 Subject: Re: [meteorite-list] differentiated asteroids and stony-iron meteorite
The principal paradigm is that the pallasites are from the core-mantle boundary of a differentiated asteroid and that magmatic irons (those group[s whose elemental ratios are consistent with formation by fractional crystallization) are from the core. There are non-magmatic irons (the IAB complex and the IIE irons) with more-controversial origins. I think that they are impact products from the surface of chondritic asteroids. The origin of mesosiderites is also controversial, but it seems to me that they are probably impact products formed when the core )or core plus mantle) of one differentiated asteroid fragment collided with the basaltic crust of another. Alan Rubin ______________________________________________ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list [email protected] https://pairlist3.pair.net/mailman/listinfo/meteorite-list
