[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.

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
>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,
>Web - http://www.galactic-stone.com
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Matt Morgan
Mile High Meteorites
PO Box 151293
Lakewood CO 80215 USA
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Received on Sat 27 Jul 2013 11:07:10 AM PDT

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