[meteorite-list] Questions about accretion.

From: Julie Brown <Vortex_at_meteoritecentral.com>
Date: Sun, 05 Apr 2009 21:08:26 -0400
Message-ID: <C23E64FAA4494EF68F6925DD04BD59C2_at_QUBIT>

----- Original Message -----
From: "Meteorites USA" <eric at meteoritesusa.com>
To: <GeoZay at aol.com>; <meteorite-list at meteoritecentral.com>
Sent: Sunday, April 05, 2009 3:52 PM
Subject: Re: [meteorite-list] Questions about accretion.


> Thanks for the responses thus far...
>
> I've studied lots of material and scientific papers on accretion, but
> still have some questions. The gravity explanation is great, but it's a
> little vague. I want to know what causes it I guess at the molecular
> level. What physical forces and interactions cause the iron to migrate
> into such a solid mass at the core?
>
> If gravity alone were the case, why is it we have H and L chondrites at
> all? Everything would be one big clump of mixed material. Has the iron
> not had a chance yet to migrate out of this layer of rock to the center
> of the asteroid? I know H and L chondrites are meteoroids that have
> broken off the parent bodies but my question is simply, had they not
> been blasted off the main body, how long would it take and in what
> manner would the iron have migrated from these layers of rock to the
> core? Iron doesn't just move through stone without some sort of catalyst
> or outside force does it? Gravity itself is not sufficient to move iron
> through a stone matrix no matter how much time passes is it? If there
> are no impacts or outside forces acting upon the body how does the iron
> loose itself from the grasp of the stone matrix to move through toward
> the core? Impacts?
>
> At the beginning of the formation of a meteoroid is it electrostatic
> attraction that causes it to get larger? At what size does it produce
> it's own gravity? Or does it? How does and asteroid become so dense? If
> asteroids are super dense, and comets are loosely bound material and
> gases, would that mean that asteroids are dead comets?
>
> Wow! I know that a lot of questions. sorry... ;)
>
> Eric
>
>
> ______________________________________________
> http://www.meteoritecentral.com
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
>
Received on Sun 05 Apr 2009 09:08:26 PM PDT