[meteorite-list] Polymict EUC vs. HOW - NWA1109 ? (& polymict diogenites -NWA 1648)

[Adam Hupe]

Dear John and List,

In simple terms, NWA 1648 was voted in as a polymict Diogenite becuase it is
mostly composed of orthopyroxene and the ratios indicated that several
Diogenitic parent rocks were sampled.

All the best,

Adam


----- Original Message -----
From: <j.divelbiss at att.net>
To: "Adam Hupe" <adamhupe at comcast.net>
Cc: "Martin Altmann" <Altmann at Meteorite-Martin.de>;
<meteorite-list at meteoritecentral.com>
Sent: Wednesday, May 26, 2004 10:41 AM
Subject: Re: [meteorite-list] Polymict EUC vs. HOW - NWA1109 ? (& polymict
diogenites -NWA 1648)


> Adam,
>
> I have a question along the same lines related to NWA 1648. Could you
summarize the differences between a polymict diogenite (like NWA 1648) and
howardites?  Does a polymict diogenite have more (or just more varied)
diogenite in them than the typical howardite?
>
> I just got a thin section of NWA 1648 from Jeff Rowell and it has very
little, if any, needle like plagioclase typcially seen in eucrite material.
Maybe that fact alone is telling me that it is mostly diogenite?
>
> Thanx in advance,
>
> John
>
>
>
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