[meteorite-list] The San Pedro de Urabá meteorite fall is approved (Feb 16, 2017, Colombia)
From: Paul Kurimsky <kd7qk_at_meteoritecentral.com>
Date: Sat, 9 Jun 2018 21:59:50 -0700 Message-ID: <8B3F8AF2-430D-4B99-B78F-E8EDA86DD857_at_flash.net> 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 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 >> >> >> -- >> --------------------------------------------------------------------------- >> Galactic Stone & Ironworks : www.galactic-stone.com >> --------------------------------------------------------------------------- >> ______________________________________________ >> >> Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com >> Meteorite-list mailing list >> Meteorite-list at meteoritecentral.com >> https://pairlist3.pair.net/mailman/listinfo/meteorite-list > > ______________________________________________ > > Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > Meteorite-list at meteoritecentral.com > https://pairlist3.pair.net/mailman/listinfo/meteorite-list Received on Sun 10 Jun 2018 12:59:50 AM PDT |
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