[meteorite-list] Met Bulletin Update - Mreïra is official.

From: Matt Morgan <mail_at_meteoritecentral.com>
Date: Sat, 27 Jul 2013 09:07:10 -0600
Message-ID: <7e389101-27b7-4403-8ea2-c9d32aba3e5c_at_email.android.com>

Thanks for mentioning this.
If anybody wants a piece you can contact Matt Morgan or Gary Fujihara. We do not have much material. The crust is velvety black and the inside is fresh and shock veined.
Matt
www.mhmeteorites.com

Galactic Stone & Ironworks <meteoritemike at gmail.com> wrote:
>Hi Collectors,
>
>The new fall from Dec 16, 2012 over Mauritania has been approved.
>
>Write-up :
>
>Mre?ra 25?57.550?N, 10?57.615?W
>Tiris Zemmour, Mauritania
>Found: Dec 2012
>Classification: Ordinary chondrite (L6)
>
>History: According to Ait Hiba Abdelhad, a fireball was seen in the
>afternoon sky on December 16, 2012, several school children saw the
>fireball explode and detonations were heard near the village of
>Mehaires, Western Sahara. Pieces were recovered approximately 40 miles
>south of Mehaires, near Mre?ra, Mauritania, only a few days after the
>event. The strewn field is in the area called "Stailt Omgrain", which
>is a local nomadic name. This is south of Mehaires and north of the
>mountain "Galbe lahmar". Therefore this is a possible fall associated
>with the fireball of December 16, 2012.
>
>Physical characteristics: The largest single piece weighed 602 grams
>and was completely covered with fresh fusion crust. A total of
>approximately 6 kg of freshly crusted stones were recovered.
>
>Petrography: (C. Agee, UNM) Microprobe examination of two polished
>surfaces shows brecciation and numerous fractured silicate grains,
>scattered equilibrated chondrules, shock-melt pockets, kamacite,
>troilite, and merrillite. Fresh, vesiculated fusion crust ~200 ?m
>thick.
>
>Geochemistry: (C. Agee and L. Burkemper, UNM) Olivine Fa24.4?0.2,
>Fe/Mn= 47?3, n=8; low-Ca pyroxene Fs20.3?0.1Wo1.5?0.1, Fe/Mn= 28?1,
>n=7; plagioclase Ab82.7?2.0An10.4?0.6Or6.8?1.4, n=4.
>
>Classification: Ordinary chondrite (L6), weathering grade (W0), shock
>grade (S6)
>
>Specimens: 91.2 g including a fusion-crusted complete stone and a
>microprobe mount on deposit at UNM, MtMorgan holds the 602 g main mass
>and another 400 g of complete stones, Gary Fujihara holds 335 g of
>fusion crusted individuals, the largest being 104 g.
>
>
>Link - http://www.lpi.usra.edu/meteor/metbull.php?code=57653
>
>Best regards and happy huntings,
>
>MikeG
>
>
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-- 
Matt Morgan
Mile High Meteorites
PO Box 151293
Lakewood CO 80215 USA
http://www.mhmeteorites.com
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Received on Sat 27 Jul 2013 11:07:10 AM PDT