Pinawa        50°12.746’N, 95°57.058’W

Manitoba, Canada

Find: 1998 or 1999

Classification: Iron meteorite (IAB-MG)

History: The meteorite was found in 1998 or 1999 by Derek Erstelle in a probable moraine deposit approximately 8.5 km NW of the town of Pinawa. It was purchased in 2017 by R. Hennie.

Physical characteristics: (S. Kissin, LHU) The meteorite has a lenticular shape, and a red-brown exterior. Oxidation has exposed the kamacite lamellae, although it has not affected the interior of the specimen except along some major fractures.

Petrography: (S. Kissin, LHU) The meteorite is an octahedrite, although its kamacite lamellae have been stretched and likely do not preserve original bandwidths. The bandwidth is greater than 1 mm in general, so the meteorite is likely a coarse octahedrite. Neumann lines are irregularly distributed and seem to be present only in areas where there is less mechanical deformation. There is good preservation of taenite lamellae, although the taenite bands are very narrow. Net plessite is sporadic, and it, as in the case of the taenite bands, is deformed. Globular schreibersite is fairly abundant, and although it displays fracturing, the rounded forms do not show evidence of deformation, with kamacite lamellae wrapping around the schreibersite.

Geochemistry: (S. Kissin, LHU) Ni=75.7, Co=3.75 (both mg/g); As=11.7, Au=1.52, Cu=139, Ga=65, Ge=200, Ir=1.59, Pt=8.3, Sb=0.17, W=0.96 (all μg/g). Obtained by neutron activation analysis (Actlabs).

Classification: (S. Kissin, LHU) IAB-MG, probable coarse octahedrite, with evidence of mechanical deformation.

Specimens: Type specimen consisting of one specimen of 48.6 g and ~2 g of fragments at UAb. Main mass with the owner.