[meteorite-list] Re: Breccia formation

From: Robert Verish <bolidechaser_at_meteoritecentral.com>
Date: Thu Apr 22 09:55:44 2004
Message-ID: <20020108185635.53383.qmail_at_web10401.mail.yahoo.com>

Thanks Rhett,

Now that you mention it, I remember reading (and
seeing ) that inclusion in one of Dr. Kring's papers.


But that raises a good point, how many "clasts" does
it take to make a breccia? Does just one "clast" make
for the entire meteorite to be called a breccia?
Wouldn't a better alternative term be "inclusion"? If
not, then that would make most chondrites a breccia.
(Or, at least a conglomerate;-)

But you're right, Rhett. This is the only example I
can think of, too. What I'm trying to reconcile, is
how can a meteorite (Gold Basin) have stones that are
L4, some L5, and a bunch that are L6, but never a
stone with a mixture of the three petrology, and never
showing evidence of brecciation?

Maybe my original question should have been, has
anyone ever cut into a Gold Basin stone and found one
end to look like L4, and the other end to look like
L6? I know I never have.

Bob V.
   
--- Rhett Bourland <rbourlan_at_evansville.net> wrote:
> After I thought about it a bit I remembered in an
> email from Dr. Kring that
> he said there have been light colored igneous clasts
> of L chondrite material
> found within GB. That would certainly be enough to
> classify it as a
> breccia.
> Regards,
> Rhett Bourland
> www.asteroidmodels.com
> www.asteroidmodels.com/personal
>
> -----Original Message-----
> From: meteorite-list-admin_at_meteoritecentral.com
> [mailto:meteorite-list-admin_at_meteoritecentral.com]On
> Behalf Of Robert
> Verish
> Sent: Tuesday, January 08, 2002 4:30 AM
> To: Meteorite-list Meteoritecentral
> Subject: [meteorite-list] Re: Breccia formation
>
>
> Speaking of BRECCIA....
>
> Has anyone ever seen a brecciated Gold Basin?
> I mean, has anyone ever cut open a Gold Basin stone,
> and found L4 breccia clasts mixed in with, say, L6
> clasts?
>
> Has anyone ever "heard" of a Gold Basin that was a
> fragmental breccia of just L4 clasts? ...or L6
> clasts?
>
> Yes, yes ..I'm the one that recovered an impact-melt
> breccia (L5 S5 W1, Fa23.3+/-0.2%) from a collection
> of small GBs, but it's olivine grains didn't pair up
> with the L4 GBs. So, the question is...
>
> Where is the evidence for Gold Basin being a
> "breccia"?
>
> Bob V.
>
> ------------- Original Message ------------
> [meteorite-list] Breccia formation
>
> Bernd Pauli HD
> Mon, 07 Jan 2002 22:31:57 +0100
>
> I would also like to direct your attention to
> another
> article in Joel Schiff's "Meteorite" magazine:
>
> NORTON O.R. (2000) Meteorite breccias
> (M! Nov. 2000, Vol. 6, No. 3, pp. 22-24).
>
> Best regards,
>
> Bernd
> ------------- End of Original Message -------------
>
>
>
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Received on Tue 08 Jan 2002 01:56:35 PM PST