[meteorite-list] Strange (And Interesting!) Allende Inclusions

From: Mark Fox <unclefireballmtf_at_meteoritecentral.com>
Date: Thu Apr 22 09:50:28 2004
Message-ID: <20020419172706.14352.qmail_at_web14911.mail.yahoo.com>

April 19, 2002


Greetings Jay Haynes, Bernd, and Fellow Meteorite
Enthusiasts!

I have two possibilities to share on this interesting
mystery:

1. Perhaps Jay's piece of Allende is "clastic" and
the strange inclusions are in a sense not that of
Allende, but are in a clast or his whole sample is a
clast. "Zenolithic" I think is the term.

2. Then again, perhaps the strange inclusions are
Allende material and really are metallic --- free
copper is the phrase. Some meteorites, such as
Garnett, Kansas is said to contain such grains which I
would like to discuss in rigorous detail some time in
the future when time permits. I should mention that
I have never heard (at least I don't exactly recall)
of free copper in a carbonaceous chondrite.

Long strewn fields!

Mark Fox
Newaygo, MI USA



--- Bernd Pauli HD
<bernd.pauli_at_lehrer1.rz.uni-karlsruhe.de> wrote:
> Jay Haynes wrote:
>
> > From the looks of the inclusion it is a sulfide
> (brass colored
> > about 1mm in length and half a mm in width). I am
> 100% sure
> > it is a slice of Allende as I just got it from
> [...] Looking over
> > the slice I see many more brass colored metal
> flakes in it but
> > much smaller as well as some ordinary metallic
> flake in the
> > matrix as well as from the looks of it (not too
> sure at this
> > moment) also in the chondrules.
>
>
> Hello Jay and List,
>
> This description still leaves me a little puzzled as
> there should
> not be anything like metal flakes and mm-sized
> brassy inclusions.
> I've been looking at my six Allende slices (the
> largest having a
> diameter of more than 2 inches) but the only
> features I could detect
> that somewhat resemble your description are
> orange-colored "specks"
> and a look at figure 6.6 (an Axtell specimen in full
> color!) in O.R.
> Norton's CEM (p. 107) says: "Weathering of the
> meteorite has altered
> some of the chondrules turning them an o r a n g e
> color". There
> should be so many Allende slices in our collections
> that it would be
> interesting to hear more about what Jay observed
> from other list
> members!
>
> Best regs,
>
> Bernd
>
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Received on Fri 19 Apr 2002 01:27:06 PM PDT