[meteorite-list] what is the most primitve meteorite?

From: Alexander Seidel <gsac_at_meteoritecentral.com>
Date: Wed, 16 Apr 2008 02:00:05 +0200
Message-ID: <20080416000005.17550_at_gmx.net>

Has any SEMARKONA [Indian fall of 1940, type LL3.0 (S2)] ever been distributed to private collectors??? I very much doubt so. One of
the "next best" primitive meteorites from Jeff?s first category,
which has surely arrived at the collector?s scene, is the KRYMKA
meteorite [Ukrainian fall of 1946, LL3.1 (S3)].

Yep, got my piece of this wonderful, pristine meteorite. :-)
Alex
Berlin/Germany
 
> 1) It means that the meteorite was relatively unaffected by secondary
> processes that occurred on asteroids, including thermal metamorphism,
> melting, shock effects, and aqueous alteration. These meteorites are
> the chondrites whose chondrules, CAIs, matrix, and presolar grains
> are in the most pristine condition. In this sense, the most
> primitive ordinary chondrite is Semarkona. There are several very
> primitive carbonaceous chondrites, including Acfer 094, Adelaide,
> ALHA 77307, and a few CR chondrites. Most of the meteorites people
> have mentioned in this thread are not particularly primitive by this
> definition.
Received on Tue 15 Apr 2008 08:00:05 PM PDT