[meteorite-list] No nickel-free iron meteorites

From: Walter Branch <waltbranch_at_meteoritecentral.com>
Date: Fri, 26 Mar 2010 23:51:39 -0400
Message-ID: <003a01cacd60$ceb085b0$0202a8c0_at_yourf78bf48ce2>

Hi Rob,

...nucleosynthesis...

Ah, one of my favorite words. I try to use it at least once a week :-)

-Walter
(give-me-some-hydrogen-atoms-and-I-can-create-any-heavier-element-up-to-iron)
Branch


----- Original Message -----
From: "Matson, Robert D." <ROBERT.D.MATSON at saic.com>
To: "meteoritelist" <meteorite-list at meteoritecentral.com>
Sent: Friday, March 26, 2010 5:31 PM
Subject: [meteorite-list] No nickel-free iron meteorites


> Hi Carl,
>
> Alan wrote:
>
>> "Please note that volumetrically, the amount of low-Ni metallic Fe is
>> trivial, far less than 0.1% of a typical chondrite."
>
> You replied:
>
>> ".1% is a relative term. Earth may be only a fraction of the size of
>> Artares [Antares] but, it is still a pretty big rock."
>
> I don't think you're quite absorbing what Dr. Rubin is saying. There is
> no
> natural solar system mechanism that can separate iron from nickel in
> macroscopic quantities. So if you find a lump of iron on earth that
> doesn't
> have nickel in it, it originated here. It is not a question of there
> being
> room for reasonable doubt. It simply cannot happen. The physics of
> nucleosynthesis, cosmochemistry, and entropy do not allow it.
>
> Best,
> Rob
> ______________________________________________
> Visit the Archives at
> http://www.meteoritecentral.com/mailing-list-archives.html
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
Received on Fri 26 Mar 2010 11:51:39 PM PDT