[meteorite-list] Main mass of Oum Dreyga (Amgala) recovered !

From: j.divelbiss_at_att.net <j.divelbiss_at_meteoritecentral.com>
Date: Thu Apr 22 10:31:14 2004
Message-ID: <041620041140.10009.407FC61C0006D46E000027192160376223FF8C8C969D939A89969BD1_at_att.net>

Hello All,

Last month I reported on my first take of the Amgala individual I got from the Hupe's that when cut sure looked like Zag to me. It being a small individual of about 20 g, it is not easy to see a lot of detail in a end cut of 2g...so I'm still not sure what I have.

The piece of Amgala I cut has a very nice blackened crust, and inside it had both the blue-ish black lithology and the lighter brown H6-like material I've seen on Zag. I do have some very nice crusted individuals of Zag whose crust looked just as nice as the piece I received. Since then I've bought and seen slices of Amgala that do look different than the first piece I cut...the interior of the Amgala slice I got looked more "yellowish" inside as if they are slightly oxidized. No significant breccia in my slice. whereas the piece I cut myself did have some.

Did I buy a Zag that was freshly picked years ago and sold to the Hupe's as Amgala...maybe??? I'll be home later tonight(12 plus hours from now) if anyone wants to see a picture of my Amagala(Zag?) individual.

What I would like to see sent to the list today is someone's picture of a fresh interior of Amgala that is not yellowed...if there is such a thing.

Curious now,

John
 


> Dear Adam and List Members,
>
> I can quite believe that the main mass of this meteorite is weighing over 2.5 kg
> (If it’s the
> case, I ask to everybody to excuse me for the title of my first message) but I
> have never
> heard about this piece and nobody has shown a picture of it.
>
> I know, of course, that this meteorite (Oum Dreyga/Amgala) is already being
> studied at NAU,
> but as it often arrives, this meteorite will be analysed by several
> laboratories. I think that
> this is a good thing and that the comparison of different studies is always rich
> in learnings.
>
> It’s sure that it is an H chondrite, the exact type will be determinated by the
> analyses.
>
> I can’t believe that a professionnal can confuse a L chondrite with a H
> chondrite and a
> weathering grade 2 with a weathering grade 0.
>
> There is a lot of swindles in this stuff, and perhaps the ill-intentioned people
> would like to
> sell Zag pieces for pieces of the new fall. But again, it’s seems to me really
> improbable to
> confuse them. Zag meteorite looks really special and is recognizable at the
> first glance. Even
> the pieces recovered three or four years ago don’t have the sight of a meteorite
> which is on
> Earth since few months.
>
> The one who has had the fortune to handle some meteorites which fell on Earth
> few times
> ago, known the « mint » appearance of them. This appearance can’t be confused
> with the
> ones which had been exposed to weathering for some times. I have had the
> occasion to
> handle a nice piece of Ben Sour recovered 15 months after the fall. This piece
> was already
> affected by the desert varnish.
>
> Best Regards,
> Philippe
>
> > Dear Phillip and List,
> >
> > The main mass is larger than 2.5 kilograms and Amgala is currently being
> > studied at NAU which should release results soon. Three different type
> > specimens have been submitted and it looks like it will classify as an
> > H3.8
> > rare Polymict Breccia with exotic clasts. Be careful about find
> > location as
> > we reported the strewn field was between Amgala and Oum Dreyga the very
> > first post we made on the subject. An unrelated L5, W2 black
> > chondrite find
> > was being mixed in at first skewing the strewn field results. Also
> > some Zag
> > is reappearing and being sold as Amgala confusing the issue even more if
> > that is possible. After looking at several pieces of Amgala and Zag
> > it is
> > easy to tell them apart. Zag has some extremely dark lithologies, the
> > crust
> > is different and is a regolith breccia.
> >
> > Hope this helps clear up some confusion,
> >
> > The Hupe Collection
> >
> >
> >
> > ----- Original Message -----
> > From: "philippe thomas" <thomasmeteorites_at_wanadoo.fr>
> > To: <meteorite-list_at_meteoritecentral.com>
> > Sent: Thursday, April 15, 2004 11:46 AM
> > Subject: [meteorite-list] Main mass of Oum Dreyga (Amgala) recovered !
> >
> >
> > Dear List Members,
> >
> > Our team has recovered from a soldier from Western Sahara an amazing
> > oriented stone with
> > flow lines (99% crusted) weighing a little bit more of one kilo. This
> > stone
> > seems to be the
> > main mass of this fall.
> > Michèle Bourot-Denise, from the MNHN of Paris) is actually analysing a
> > sample of this fall
> > but it appears clearly that this is an ordinary H chondrite.
> >
> > Some dealers are using as provisional name for this fall « Amgala »,
> > but the
> > strewnfield is
> > closer to Oum Dreyga. Amgala is 250km far away.
> >
> > You can see this piece of Oum Dreyga in my website www.meteoritica.com
> >
> > Best Wishes
> > Philippe Thomas
> >
> > ______________________________________________
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> > Meteorite-list_at_meteoritecentral.com
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> >
>
>
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Received on Fri 16 Apr 2004 07:40:14 AM PDT