[meteorite-list] NWA5400

Since this tracks on the terestial O2 line, can this be concidered a planetary meteorite, along with the Lunars, Martians, as well as Asteroid 4 vesta? Would these be the only 4 planitaries so far or has maybe Mecrury checked in with a sample of it's own? Pete IMCA 1733

[meteorite-list] NWA5400

Hi Pete, Aubrites and enstatite chondrites also plot on the oxygen isotope terrestrial fractionation line (TFL) and up to now they are not proven to be from planets. So being on the TFL doesn't make the meteorite planetary. But I guess it depends on your definition of planetaries, I would only

Re: [meteorite-list] NWA5400

Dear Professor Agee, The IAU's decision to go all rogue on the definition of a planet, dwarf-planet, minor-planet, [iamnotaplanet, iamtooaplanet, someplanetnamedstan] doesn't leave me with a warm and fuzzy about calling Earth a planet. Cleared our orbit - I'm not even certain that's necessarily

Re: [meteorite-list] NWA5400

Hi Jodie, My bias is from a planetary differentiation perspective. The only known meteorites to sample solar system bodies with long-lived (1 BY) igneous activity are lunars and martians. The HEDs might be considered borderline planetaries, since some cumulate eucrites have slightly younger ages

Re: [meteorite-list] NWA5400 redux - a long explanation

Hi David, Carl and List, Thanks for the detailed explanation David. :) I recall reading something about catastrophic events that can reset the CRE of some materials. Maybe I am not remembering correctly. Is it possible that a cataclysmic event could shock/alter a material to such a degree

[meteorite-list] Nwa5400 rdux - oops!

:44 AM | To: drv...@sas.upenn.edu | Subject: Re: [meteorite-list] NWA5400 redux - a long explanation | | | Awesome info! do you mind if I repost some of this? | | Greg Catterton | www.wanderingstarmeteorites.com | IMCA member 4682 | On Ebay: http://stores.shop.ebay.com/wanderingstarmeteorites

[meteorite-list] NWA5400 redux - a long explanation

Carl: I am glad that I provoked thought - that is in my mandate as an educator...;) I will try to answer your questions, albeit perhaps not in order, and I hope I can explain. First, you ask about Mbarak's box of rocks, aren't they likely paired? Well, it is very unlikely that two different