Hello, I am looking for Johnstown Diogenite or similar materials whose orthopyroxene may contain GP zone. GP zone is a kind of exsolved precipitates that only have one or several units. It was found in lunar meteorites and plutonic rocks (such as Webster-Addie alpine ultramafic rock). GP zone will be found in rocks or meteorites with a very slow cooling history. I could not find GP zones in Tatahouine diogenite, but perhaps diogenites are good candidate contains GP zone.
I want to look at the GP zone using STEM. If you have good samples, please email me the detail and price. I need fragments or thin sections. I need to make [001] cross sections of orthopyroxene for STEM observations. References Nord 1980 The Composition, Structure, and Stability of Guinier-Preston Zones in Lunar and Terrestrial Orthopyroxene. Phys. Chem. Minerals 6, 109 128. Langenhorst et al., 2006 On the nature of Guinier-Preston zones in meteoritic and lunar orthopyroxene. Lunar and Planetary Science XXXVII. Best Wishes, Hiromi Konishi Dept of Geology, Niigata University ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
