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

[Paul Kurimsky]

Nice!

Sent from my iPhone

> On Jun 8, 2018, at 8:00 PM, Michael Farmer via Meteorite-list <meteorite-list at meteoritecentral.com> wrote:
> 
> 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 Urabá meteorite fall from February 2017 has been
>> approved and published in the Met Bulletin :
>> 
>> San Pedro de Urabá
>> 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 Urabá, 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
>> μm, with many around 100 to 200 μm. Troilite anhedral and dominantly
>> single crystal to 400 μm. Rare anhedral Ca-Na-Mg phosphates to 60 μm.
>> Chromite to 600 μm 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
>> μm.
>> 
>> 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
>> 
>> 
>> -- 
>> ---------------------------------------------------------------------------
>> Galactic Stone & Ironworks : www.galactic-stone.com
>> ---------------------------------------------------------------------------
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