Northwest Africa 10417 (NWA 10417)

Morocco

Purchased: 2015 May

Classification: Iron meteorite (IAB-MG)

History: A single specimen was purchased in May 2015 by Fabien Kuntz from a Moroccan dealer in Erfoud.

Petrography: (C. Herd and Y. Orui, UAb): Optical investigation and bandwidth measurement of a 3 × 3.5 cm polished and etched end slice reveals a well-developed Widmanstatten pattern consistent with a coarse octahedrite (average bandwidth = 1.7±0.3 mm, n = 43). Plessite is common. One 4 × 9 mm troilite inclusion was observed.

Geochemistry: Bulk composition (C. Herd and G. Chen, UAb): Ni = 8.1 wt%, Co = 4.8 mg/g; Ir = 2.6, Pt = 5.6, Os = 2.0, Ru = 4.5, Rh = 1.1, Pd = 3.7, Au = 1.5, Ga = 89, As = 16.9, W = 0.8, Re = 0.2, Cu = 171 (all μg/g), obtained by solution ICP-MS using North Chile (Filomena) as an internal standard.

Classification: (C. Herd, UAb): IAB-MG, coarse octahedrite. Composition is consistent with IAB Complex, Main Group (MG), although Ni and As are slightly above the typical Main Group concentrations relative to those reported by Wasson and Kallemeyn (2002).

Specimens: Type specimen of 24.1 g, including a single, 18 g etched end slice, and several smaller pieces (one of which was used for ICP-MS analysis), at UAb. Main mass Kuntz.