[meteorite-list] CR2 Chondrites

From: LABENNE METEORITES <metlabo1_at_meteoritecentral.com>
Date: Thu Apr 22 09:48:14 2004
Message-ID: <3.0.1.32.20011030130517.0096ba70_at_pop3.norton.antivirus>

Hello Bernd and all,


Now there are one CR3 ! The first meteorite to be found of the type CR3
is one of our find:


NAME: SAH00182

TYPE: CR3

COUNTRY: Not disclosed at present time, SAHARA.

DATE OF FIND: Found January 2000

T. K.W: 70g, one stone


SAHARA 00182, THE FIRST CR3 CHONDRITE AND FORMATION OF MULTI-LAYERED
CHONDRULES. <italic><underline>Michael K. Weisberg 1,2
(mweisberg_at_kbcc.cuny.edu) (1) Kingsborough College (City University of
New York) NY, NY 11235, (2) American Museum of Natural History, New York
10024</underline></italic>:

<italic>

-The SAH00182 is the first CR3. The SAH 00182 contains large (up to 2mm
diameter), metal-rich, multi-layered chondrules that are texturally
similar to those in the CR chondrites. Most chondrules in SAH 00182 are
type I with Mg-rich silicates.</italic> The <italic>SAH 00182 is
petrologically similar to the CR chondrites but has escaped hydrous
alteration and appears to be the <underline>first known CR3
chondrite</underline>. This affords us the opportunity to petrologically,
as well as oxygen isotopically, study an entire alteration sequence in a
group of primitive carbonaceous chondritic materials, ranging from
<underline>unaltered (SAH 00182)</underline> to completely hydrated
(GRO95577). Additionally, this is the first opportunity to study
multi-layered chondrules from a meteorite that has escaped secondary
hydrous alteration.

</italic>





A 11:57 PM 10/29/01 +0100, Bernd Pauli HD a =E9crit :

>Sorry, there are now 16 (sixteen) CR2 carbonaceous chondrites

>worldwide. Dean, you reall know how to make people nervous

>with such horrendous late night news (it's about midnight here).

>

>Bernd

>

>

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Received on Tue 30 Oct 2001 07:05:17 AM PST