[meteorite-list] Near pure Olivine Meteorite

[pshugar at messengersfromthecosmos.com]

Would they also melt or more correctly ablate off material faster and
more completely
upon entering the earth's atmosphere?
Pete


> -------- Original Message --------
> Subject: Re: [meteorite-list] Near pure Olivine Meteorite
> From: "Alan Rubin" <aerubin at ucla.edu>
> Date: Tue, January 14, 2014 6:54 pm
> To: "Jim Wooddell" <jim.wooddell at suddenlink.net>,
> <meteorite-list at meteoritecentral.com>
> 
> 
> The question of the dearth of olivine meteorites (asteroidal dunites) has 
> been around for a very long time.  Most folks have ascribed this paucity as 
> being due to the brittle nature of olivine meteorites relative to 
> pallasites.  Pallasites have relatively long cosmic-ray-exposure ages 
> indicating that they can survive the rigors of interplanetary space for a 
> rather long while.  Eucrites have much shorter CRE ages on average.  This 
> suggests that if asteroidal dunites are from deep in the mantle, they would 
> be in space about as long as the pallasites and not survive because they are 
> no tougher than eucrites.
> Alan
> 
> 
> Alan Rubin
> Institute of Geophysics and Planetary Physics
> University of California
> 3845 Slichter Hall
> 603 Charles Young Dr. E
> Los Angeles, CA  90095-1567
> phone: 310-825-3202
> e-mail: aerubin at ucla.edu
> website: http://cosmochemists.igpp.ucla.edu/Rubin.html
> 
> 
> ----- Original Message ----- 
> From: "Jim Wooddell" <jim.wooddell at suddenlink.net>
> To: <meteorite-list at meteoritecentral.com>
> Sent: Tuesday, January 14, 2014 4:05 PM
> Subject: [meteorite-list] Near pure Olivine Meteorite
> 
> 
> > So, we find pallasites, we find irons, we find chondrites.  And, with the 
> > pallasites some are loaded with a lot of olivine.  So anyone have any 
> > scientific ideas why we don't find near pure olivine meteorites?  Or do 
> > we??
> >
> > For the sake of conversation...
> >
> > Jim
> >
> > -- 
> > Jim Wooddell
> > jim.wooddell at suddenlink.net
> > http://pages.suddenlink.net/chondrule/
> >
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