Greetings all, I'd like to announce NWA 8615, a new Howardite that I purchased earlier this year and was just recently classified. Carl Agee describes it as Two matching stones, weathered exterior with some caliche. A saw-cut reveals a breccia of light and dark clasts set in dark brown matrix.
Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a highly brecciated texture with ~50% diogenitic pyroxenes, ~25% gabbroic eucrite pyroxenes showing Fe zoning, and ~25% equilibrated basaltic eucrite clasts showing clear separation between augite and pigeonite, with coarse exsolution lamellae. Accessory Fe-Ni metal, troilite, Ti-rich chromite, chromite, and ilmenite throughout. Geochemistry: (C. Agee and N. Muttik, UNM) Diogenite orthopyroxene Fs28.8±6.2Wo2.4±1.4, Fe/Mn=34±6, n=10; gabbroic eucrite low-Ca pyroxene Fs47.1±3.7Wo4.7±3.7, Fe/Mn=36±6, n=8, basaltic eucrite augite Fs44.3±11.0Wo27.0±12.6, Fe/Mn=34±1, n=3; basaltic eucrite pigeonite Fs62.9±1.2Wo6.6±1.9, Fe/Mn=33±2, n=3; plagioclase An89.3±2.5Ab10.2±2.3Or0.5±0.2, n=6. Classification: Achondrite (howardite) with three lithologies: 1) diogenite, 2) unequilibrated gabbroic eucrite with zoned pyroxenes, 3) equilibrated basaltic eucrite. TKW is only 109 grams, so after type specimen and cut loss, there is only a small amount of this material available. I've listed 10 pieces tonight and will list a dozen or so more tomorrow. Free shipping on orders over $100. I have put photos on Flickr. In the past I have marked sold specimens in the description. This has created some confusion. From now on, as items sell, I will remove the picture of the sold specimens. Price is $20 per gram for a limited time. See: https://www.flickr.com/photos/stevewitt/sets/72157648967596398/ Please also check out my other albums with specimens for sale here: https://www.flickr.com/photos/stevewitt/sets thanks for your time, Steve Steve Witt IMCA #9020 http://imca.cc/ ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
