Lac Dodon is an

iron meteorite Iron meteorites, also called siderites or ferrous meteorites, are a type of meteorite that consist overwhelmingly of an iron–nickel alloy known as meteoric iron that usually consists of two mineral phases: kamacite and taenite. Most iron me ...

discovered by Roland Octerneau of Montreal on rural private property near Lac Dodon,

Saint-Calixte, Quebec Saint-Calixte () is a municipality and town in the Lanaudière region of Quebec, Canada, part of the Montcalm Regional County Municipality. Its proximity to the city of Montreal, and its natural environment, make Saint-Calixte a destination for c ...

.Meteoritical Bulletin Database
/ref>Kissin,S. A.; Herd, R. K., 1995, Two New Iron Meteorites from the Province of Quebec, Canada, Meteoritics, vol. 30,no. 5, page 527 The recovered fragment measures approximately x x . The meteorite was oxidized on its exterior and lying at the surface of the ground.

Composition and classification

The meteorite is a coarse octahedrite (mean bandwidth 1.34mm) with narrow cloudy

taenite Taenite is a mineral found naturally on Earth mostly in iron meteorites. It is an alloy of iron and nickel, with a chemical formula of and nickel proportions of 20% up to 65%. The name is derived from the Greek ταινία for "band, ribbo ...

bands separating the

kamacite Kamacite is an alloy of iron and nickel, which is found on Earth only in meteorites. According to the International Mineralogical Association (IMA) it is considered a proper nickel-rich variety of the mineral native iron. The proportion iron:ni ...

lamellae. Occasional areas of coarse to fine acicular plessite and net plessite are

Neumann lines Neumann lines, or Neumann bands, are fine patterns of parallel lines seen in cross-sections of many hexahedrite iron meteorites in the kamacite phase, although they may appear also in octahedrites provided the kamacite phase is about 30 micromet ...

and rhabdites. Sparsely developed Brezina lamellae and fine-grained globular

schreibersite Schreibersite is generally a rare iron nickel phosphide mineral, , though common in iron-nickel meteorites. It has been found on Disko Island in Greenland and Illinois. Another name used for the mineral is rhabdite. It forms tetragonal crystals ...

are present. At one exterior surface, a heat-affected zone 0.1mm thick containing unequilibrated alpha(sub)2-kamacite is preserved. Cloudy taenite extending into this zone has developed bainitic texture. The presence of the zone suggests a relatively recent fall.

Composition and classification

References

See also