[meteorite-list] New excelent material - Eucrite and CK3AD!!!!!!!!!!

From: Martin Altmann <altmann_at_meteoritecentral.com>
Date: Sun, 11 Nov 2007 11:41:44 +0100
Message-ID: <003401c8244f$74b6c310$177f2a59_at_name86d88d87e2>

Not sooo hard, I think.

Beroud/Bertrand compared TNZ 057 and NWA 2900 and found them to be extremely
similar.
It's no surprise that they got 3 different types now, as such kind of
carbonaceous do have affinities to CK as well as to CV.

A few unequilibrated chondrules are found, CAIs, and the huge irregular
white blobs, are supposed to be metamorphosed CAIs.
The DIs aren't looking like melt pockets, they have a fine-grained texture
with sometimes a very very few single chondrules and CAIs left.

Maybe Bernd can supply us with some references to the sparse DIs in Allende?

Very interesting stuff. Now we have already a third stone of this exciting
type, I'd say, cause Marcin's slices look so identically that, if you'd mix
them with 2900, you wouldn't be able to sort both numbers out again.
(No piggy-backing, we have only a very few slices left, while all with DIs
are gone long ago).

Frederic, can we have some details, pics?

Best!
Martin




-----Urspr?ngliche Nachricht-----
Von: Jeff Kuyken [mailto:info at meteorites.com.au]
Gesendet: Sonntag, 11. November 2007 03:40
An: Martin Altmann; meteorite-list at meteoritecentral.com
Betreff: Re: [meteorite-list] New excelent material - Eucrite and
CK3AD!!!!!!!!!!

Hey Martin & all,

It's a hard call. Is anyone aware of one of these dark areas being studied
in detail? I personally think that TNZ 057 is distinctly different as the
DIs are much more crisply defined and quite unique in appearance to the host
material. Marcin's pieces are beautiful and some of the pics make me wonder
whether the darker areas could be of a shock origin. For example:

http://www.polandmet.com/gfx_nwa4964/003b.jpg

It actually reminds me of NWA 4679 (CK4):

http://www.meteorites.com.au/collection/NWA%204679%20CK4%2010.5g%20(1%20of%2
02)-500.jpg

Cheers,

Jeff

----- Original Message -----
From: Martin Altmann
To: meteorite-list at meteoritecentral.com
Sent: Sunday, November 11, 2007 11:29 AM
Subject: Re: [meteorite-list] New excelent material - Eucrite and
CK3AD!!!!!!!!!!


Hi Marcin,

that CK3 with its high chondrules density, large CAIs and dark inclusions
reminds me very closely to Tanezrouft 057 (classified as C4-anom, if I
remember right, a mixture with CK) and NWA 2900 (which ended up after a
longer while as CV3, but which is very similar to TNZ 057).

HaH 280 is only at a glance similar with the DIs, simply because it has
almost no chondrules and is strongly weathered.

Opinions?
Best!
Martin




-----Urspr?ngliche Nachricht-----
Von: meteorite-list-bounces at meteoritecentral.com
[mailto:meteorite-list-bounces at meteoritecentral.com] Im Auftrag von
PolandMET
Gesendet: Sonntag, 11. November 2007 01:01
An: meteorite-list at meteoritecentral.com
Betreff: [meteorite-list] New excelent material - Eucrite and CK3
AD!!!!!!!!!!

Hi List
Tooday I want introduce another excelent material from NWA496x serie.

NWA 4963
Achondrite, Eucrite S2/W-low
http://www.polandmet.com/_nwa4963.htm
Fresh eucrite with wonderfull brecciated interior. Very low TKW. As alvays,
only thin, polished full slices.

NWA 4964
Carbonaceous Chondrite CK3 S2/W-fresh
http://www.polandmet.com/_nwa4963.htm
Something that noone should mised. This CK3 is without doubt best on the
market right now. It have several excelent features worth to look much
closer and study.

First, large, 1cm CAI inclusions with different shapes. Something that I not

expecting to find in CK chondrite.
http://www.polandmet.com/gfx_nwa4964/008d.jpg

Second, monster size black inclusion of different type of CK (very similar
shape to my slice of HaH280 CK4). This inclusion was visible from outside
and was patrialy hidden under fussion crust.
http://www.polandmet.com/gfx_nwa4964/001a.jpg

Third, something that I find tooday while making photos of my slices. There
are two CK3 zones in this meteorite. One is more rich in chondruls, and
another have less and smaller chondruls. Best example is on this slice where

large CAI was cut in half by border beetween two CK3 zones.
http://www.polandmet.com/gfx_nwa4964/007c.jpg

And all this features for really fair price.
Enjoy photos.

-----[ MARCIN CIMALA ]-----[ I.M.C.A.#3667 ]-----
http://www.Meteoryty.pl marcin(at)meteoryty.pl
http://www.PolandMET.com marcin(at)meteorite.pl
http://www.Gao-Guenie.com GSM +48(607)535 195
--------[ Member of Polish Meteoritical Society ]--------

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Received on Sun 11 Nov 2007 05:41:44 AM PST