Mike wrote (in a private mail): "The finer grains: ... Many are complete rice shaped grains and in the order of 1 to 2 mm wide. Any insights as to what these finer grains represent?"
Hello Mike (and List), Thank you for the attached image of your remarkable Estherville slice. As for the finer grains, they might represent grains of tetrataenite (nickel-iron with an extremely high nickel content of up to 60%) or maybe grains of cloudy taenite with a rim of tetrataenite. HUTCHISON R. (2004) Meteorites: A Petrologic, Chemical, and Isotopic Synthesis (Cambridge Planetary Science Series) p. 353: "Taenite and tetrataenite are present in the interiors of [mesosiderite] metal grains." Cheers, Bernd ______________________________________________ Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
