Hello Bernd, and do you remember the NWA 4905 in your collection, which in that context could point in that direction? Although we haven't new results yet.
Wait, Tom Phillips made also some of his fantastic takes with NWA 4905.. Here: http://www.meteorite-times.com/Back_Links/2009/april/index.htm Click in the side menu on "Micro Visions". Funny enough Tom writes there about his macroscopic impressions: "I think I would dismiss it as Granite." Best! Martin (Ouch, the impertinent seller in me tips my shoulder and murmurs: Somewhere in their vast stock, Chladni's Heirs should have a slice of that fabulous stuff left!) -----Ursprüngliche Nachricht----- Von: [email protected] [mailto:[email protected]] Im Auftrag von [email protected] Gesendet: Freitag, 26. Juni 2009 18:26 An: [email protected] Betreff: [meteorite-list] Quartz in meteorites Hello Folks, 01) MONTEIRO J.F. (1989) Preliminary study of the Chaves howardite (Meteoritics 24-4, 1989, pp. A305-A306): "Quartz and tridymite were observed in thin section..." 02) RUBIN A.E. (1997) Mineralogy of meteorite groups (Meteoritics 32-2, 1997, 231-247, p. 241, excerpts): "The basaltic shergottites are fine-grained rocks consisting of major pigeonite, augite and maskelynite, minor titanian magnetite, ilmenite, pyrrhotite and whitlockite, and accessory fayalite, q u a r t z , baddeleyite and chlorapatite within the mesostasis (McSween, 1994)." 03) AFANASIEV S.V. et al. (2000) Dhofar 007 and Northwest Africa 011: Two new eucrites of different types (MAPS 35-5, 2000, Suppl., A019): "Northwest Africa 011 is an unbrecciated achondrite unlike ... Accessories are metal, troilite, spinel, ilmenite, and q u a r t z." 04) SEMENENKO V.P. et al. (1998) The Galkiv meteorite: A new H4 chondrite from Ukraine (MAPS 33, 1998, A193-A196): "The meteorite contains olivine, low-Ca pyroxene, Ni-Fe, troilite, and minor amounts of high-Ca pyroxene, chromite, feldspathic plagioclase, phosphates, metallic Cu and rare grains of spinel and q u a r t z ." 05) ZHANG Y. et al. (1996) Pyroxene structures, cathodoluminescence and the thermal history of the enstatite chondrites (Meteoritics 31-1, 1996, 87-96): "Mason (1968) suggested a maximum equilibration temperature of 870°C based on the presence of q u a r t z ." Best wishes, Bernd ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
