Seasons Greetings Bulletin Watchers, There is a recent update to the Met Bulletin. The new approval is NWA 8161, a poikilitic shergottite.
Link - http://www.lpi.usra.edu/meteor/index.php?code=58489 Write-up : Northwest Africa 8161 (NWA 8161) Morocco Purchased: 2013 Classification: Martian meteorite (Shergottite) History: Purchased by Aziz Habibi in Morocco, 2013. Physical characteristics: Several fragments that fit together to form a nearly complete stone. Shiny black crust, broken surface reveals polycrystalline texture with millimeter-sized grains Petrography: (C. Agee, UNM) Microprobe examination of a polished epoxy mount shows ~40% olivine, ~40% pyroxene, ~10% maskelynite, ubiquitous Cr-Ti-Fe oxides; sulfide present. Pyroxenes and olivines are heavily shocked, grain size ranges from 200-2000 μm. Geochemistry: (C. Agee and N. Muttik, UNM) EMPA. Olivine Fa40.1±3.7, Fe/Mn=52±1, n=12; pigeonite Fs28.6±2.7Wo9.7±2.7, Fe/Mn=30±1, n=23; augite Fs19.4±1.9Wo32.0±4.4, Fe/Mn=27±1, n=9; maskelynite Or2.3±0.4Ab47.2±3.0An50.5±3.2, n=8. Classification: Martian meteorite (shergottite, poikilitic) Specimens: 20.5 g including microprobe mount on deposit UNM, Aziz Habibi holds the main mass. --------------------------------- Best regards and Happy Huntings, MikeG -- ------------------------------------------------------------- Web - http://www.galactic-stone.com Facebook - http://www.facebook.com/galacticstone Twitter - http://twitter.com/galacticstone Pinterest - http://pinterest.com/galacticstone ------------------------------------------------------------- ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
