Lac Dodon meteorite
Encyclopedia
Lac Dodon is an iron meteorite
discovered by Roland Octerneau of Montreal on rural private property near Lac Dodon, Saint-Calixte, Quebec
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The recovered fragment measures approximately 10cm x 5cm x 6cm. The meteorite was oxidized on its exterior and lying at the surface of the ground.
bands separating the kamacite
lamellae. Occasional areas of coarse to fine acicular plessite and net plessite are Neumann lines and rhabdites. Sparsely developed Brezina lamellae and fine-grained globular schreibersite
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.
Iron meteorite
Iron meteorites are meteorites that consist overwhelmingly of nickel-iron alloys. The metal taken from these meteorites is known as meteoric iron and was one of the earliest sources of usable iron available to humans.-Occurrence:...
discovered by Roland Octerneau of Montreal on rural private property near Lac Dodon, Saint-Calixte, Quebec
Saint-Calixte, Quebec
Saint-Calixte is a municipality and town in the Lanaudière region of Quebec, Canada, part of the Montcalm Regional County Municipality.-History:...
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The recovered fragment measures approximately 10cm x 5cm x 6cm. 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 taeniteTaenite
Taenite is a mineral found naturally on Earth mostly in iron meteorites. It is an alloy of iron and nickel, with nickel proportions of 20% up to 65%.The name is derived from the Greek for "band". Taenite is a major constituent of iron meteorites...
bands separating the kamacite
Kamacite
Kamacite is a mineral. It is an alloy of iron and nickel, usually in the proportions of 90:10 to 95:5 although impurities such as cobalt or carbon may be present. On the surface of Earth, it occurs naturally only in meteorites. It has a metallic luster, is gray and has no clear cleavage although...
lamellae. Occasional areas of coarse to fine acicular plessite and net plessite are Neumann lines and rhabdites. Sparsely developed Brezina lamellae and fine-grained globular schreibersite
Schreibersite
Schreibersite is generally a rare iron nickel phosphide mineral, 3P, though common in iron-nickel meteorites. It is rarely reported from Earth . Another name used for the mineral is rhabdite. It forms tetragonal crystals with perfect 001 cleavage. Its color ranges from bronze to brass yellow to...
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.