[meteorite-list] Ad: Special: NWA 7324 - EH Melt Rock

From: Stefan Ralew <stefan_at_meteoritecentral.com>
Date: Thu, 11 Oct 2012 23:12:59 +0200
Message-ID: <0747BF21B33F41AD9CC3F7B1D94C191A_at_StefanPC>

Dear list members,

today I have something really special to offer, NWA 7324 (prov.), an EH melt
rock. This is one of the rarest meteorite classes, probably rarer than Lunar
and Martian meteorites. NWA 7324 is possibly the first EH melt rock which is
available for the private collectors (??). According to the Meteoritical
Bulletin, there are only 6 different EH melts rocks known with a weight of
496 g all together, and all came from Antarctica.

NWA 7324 is classified by Dr. Anthony Irving. His first classification
result was EL melt rock but he corrected it to EH melt rock, based on a high
Si content in the metal and the presence of niningerite, a sulfide which is
typical for EH chondrites. It will also be corrected in the meteoritical
bulletin. NWA 7324 has a large amount of metallic iron, much more than any
H-chondrite. The polished cut surfaces show very beautiful patterns of iron.
The inside of the meteorite is fresh, the outside is slightly weathered and
"sandblasted", and shows an interesting "weathering crust" on some places.

Below is the description of NWA 7324:
"Relatively fine grained aggregate of highly magnesian silicates and
abundant metal and sulfides. Enstatite, some forsterite, ragged grains of
metal, Cr-bearing troilite, niningerite and rare oldhamite. Portions of the
matrix consist of silica-rich glass (K-bearing) containing tiny crystals of
a very Si-rich mineral (silica or possibly sinoite)."

NWA 7324 is particulary important for type collectors. Slices and part
slices in different sizes are avalable at a collector friendly price of
$30/g.

http://www.sr-meteorites.de/specials/nwa7324/special-nwa7324.html

Thanks for looking!

Best regards,
Stefan Ralew

SR-Meteorites
www.sr-meteorites.de
www.moonrocks.de
Received on Thu 11 Oct 2012 05:12:59 PM PDT