[meteorite-list] The San Pedro de Urabá meteorite fall is approved (Feb 16, 2017, Colombia)

From: Michael Farmer <mike_at_meteoritecentral.com>
Date: Fri, 8 Jun 2018 20:00:32 -0700
Message-ID: <431B91A1-B978-46CA-A87B-B124F40A700E_at_meteoriteguy.com>

This is a gorgeous meteorite. I cut a few grams off for ASU and I have 4 slices and partslices totaling about 50 grams, and that?s it. The mass stays intact
Michael Farmer

> On Jun 8, 2018, at 12:45 PM, Galactic Stone & Ironworks via Meteorite-list <meteorite-list at meteoritecentral.com> wrote:
>
> The San Pedro de Urab? meteorite fall from February 2017 has been
> approved and published in the Met Bulletin :
>
> San Pedro de Urab?
> 8?16?44.39"N, 76?22?41.67"W
> Antioquia, Colombia
> Confirmed fall: 16 Feb 2017
> Classification: Ordinary chondrite (L6)
>
> History: At 5:30 pm local time on 16 February 2017, a large fireball
> with sonic booms was observed in northern Colombia. A meteorite
> subsequently impacted near Mr. Orlando Cuevas on the edge of a soccer
> field in San Pedro de Urab?, Turbo district, Antioquia State,
> Colombia. The event was widely reported in the local media. Two other
> stones are known to have fallen, one much larger than the one that was
> collected in the soccer field, but their whereabouts are unknown.
> Michael Farmer acquired the 3768 g stone from Mr. Cuevas.
>
> Physical characteristics: Single regmaglypted stone covered with matte
> black fusion crust. Interior is a light greenish-gray and friable. Cut
> surface shows poorly defined chondrules and even distribution of small
> metal/troilite grains. Only a single thin shock vein is visible.
>
> Petrography: SEM observation of a polished mount shows scattered
> poorly defined chondrules (BO, RP, and PO) largely integrated with the
> matrix. All silicates heavily fractured. Feldspar grains typically >50
> ?m, with many around 100 to 200 ?m. Troilite anhedral and dominantly
> single crystal to 400 ?m. Rare anhedral Ca-Na-Mg phosphates to 60 ?m.
> Chromite to 600 ?m is anhedral to subhedral and heavily fractured.
> Three Fe-Ni metal types present: kamacite, dominantly single crystal
> (to 0.5 mm) with a frosty etch and weakly defined Neumann bands;
> tetrataenite, rare, commonly contiguous to kamacite; and, equant
> Ni-zoned grains with Ni-rich rims and dark-etched cores, some showing
> kamacite spindles. Native Cu is rare and occurs as <10 micron grains
> at kamacite/troilite boundary. Scattered and rare melt pockets to 60
> ?m.
>
> Geochemistry: Olivine Fa25.1?0.3, FeO/MnO=47.6?1.8, n=9; low Ca
> pyroxene Fs21.4?1.2Wo1.5?0.2, FeO/MnO=28.4?1.3, n=10; Feldspars
> Or13.4?0.3Ab67.3?67.3?0.5, n=3 and Or5.4?0.1Ab84.4?0.02, n=2.
>
> Classification: Ordinary chondrite L6, S3, W0
>
> Specimens: 32 g at ASU. Main mass with MFarmer.
>
> Link - https://www.lpi.usra.edu/meteor/metbull.php?code=67598
>
> 21st Century Witnessed Falls - http://galactic-stone.com/pages/falls
>
>
> --
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> Galactic Stone & Ironworks : www.galactic-stone.com
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Received on Fri 08 Jun 2018 11:00:32 PM PDT