North West Africa 6290
Classification Diogenite Breccia
Status OFFICIAL Listed in the Meteoritical Bulletin Database
Purchase or find date NWA 2010
Total Known Weight 1000g
Specimen Weight 6g end cut
Composition Fresh polymict breccia composed predominantly of distinctly “milky” orthopyroxene fragments and some polycrystalline clasts, with sparse pigeonite, olivine (bimodal in composition), calcic plagioclase, chromite, troilite and Ni-poor metal. Orthopyroxene (Fs22.9-24.9Wo1.0; FeO/MnO = 30.8-31.0), pigeonite (Fs28.1-29.1Wo13.4-7.0; FeO/MnO = 22/6-26.0), magnesian olivine (Fa12.9-13.1; FeO/MnO = 40.9-48.5), ferroan olivine (Fa31.0; FeO/MnO = 44.2). Most of the orthopyroxene is charged with microscopic inclusions of chromite and troilite, which render it pale tan-colored in thin section.