[meteorite-list] Pairings (?): NWA 1109 - NWA 1553 - NWA 2226

From: bernd.pauli_at_paulinet.de <bernd.pauli_at_meteoritecentral.com>
Date: Sun Jul 10 12:16:52 2005
Message-ID: <DIIE.0000002700003A76_at_paulinet.de>

Chicago Steve wrote:

> been wondering about the pairings of nwa 1109, nwa 2226,
> and nwa 1553. Are all these 3 paired or are 2 of them...?

Steve also wrote:

> I have a beautiful 58 gram slice of nwa 1553, which is unclassified.

So, how can it be paired to 1109 and/or 2226 if it is *unclassified* ?

> But it looks just like my old piece of nwa 1109.

Dean, too, suggested that NWA 1109 and NWA 1553 should be one and
the same meteorite, but, as he never got his NWA 1553 classified
(as far as I know), one cannot tell for sure.

My 8.6-gram NWA 1553 with its *large*, conspicuous, jet-black clasts (from
Dean) looks quite different than my small NWA 1109 piece (from the Hupes).

NWA 2226, on the other hand, has been officially classified as a
howardite by Prof. A. Bischoff (University, M?nster, Germany).

And my 8.5-gram piece of NWA 2226 has those light-colored streaks that
neither 1109 nor 1553 have. A similar, vein-like layered texture has also
been observed in a few Millbillillies, but these are a light- to medium-gray.

Can anyone shed more light on these subparallel light-clored layers of
Dean's NWA 2226? For Millbillillie, Yamaguchi et al. propose an impact
event.

Reference:

YAMAGUCHI A. et al. (1994) Textural variations and impact history
of the Millbillillie eucrite (Meteoritics 29-2, 1994, pp. 237-245).


Regards,

Bernd
Received on Sun 10 Jul 2005 12:16:50 PM PDT