Northwest Africa 7129 (NWA 7129)
(Northwest Africa)
Purchased: 2011 Sep
Classification: Ungrouped achondrite
History: Purchased by Gary Fujihara from a Moroccan dealer in September 2011.
Petrography: (A. Irving and S. Kuehner, UWS) Very fresh granular aggregate of very finely exsolved, pinkish-brown pyroxene, polygranular calcic plagioclase, sparse twinned plagioclase laths, ilmenite, minor ferroan olivine, pyrrhotite and Ni-free metal. A blade of baddeleyite was found in one ilmenite grain.
Geochemistry: Olivine (Fa82.2-82.7, FeO/MnO = 81-85), low-Ca pyroxene host (Fs63.9Wo6.0), FeO/MnO = 63) with high-Ca pyroxene lamellae (Fs35.0Wo38.6, FeO/MnO =63), high-Ca pyroxene host (Fs41.1Wo32.1, FeO/MnO = 67) with low-Ca pyroxene lamellae (Fs62.3Wo7.9, FeO/MnO = 66).
Classification: Achondrite, ungrouped. Paired with NWA 011, NWA 2400, NWA 2976, NWA 4587, NWA 4901 and NWA 5644.
Specimens: 10 g of type material and one polished thin section are on deposit at UWB. The remaining material is held by Mr. G. Fujihara.
