astro.wikisort.org - Meteorite

Lac Dodon is an iron meteorite discovered by Roland Octerneau of Montreal on rural private property near Lac Dodon, Saint-Calixte, Quebec.[1][2]

Lac Dodon
Type	Iron
Structural classification	Coarse octahedrite
Group	IAB complex[1]
Composition	91% Fe, 8.64% Ni, 71 ppm Ga, 377 ppm Ge, 3.30 ppm Ir
Country	Canada
Region	Quebec, Canada
Coordinates	45°57′00″N 73°55′00″W
Observed fall	no
Found date	1993
TKW	0.8 kilograms (1.8 lb)[1]

The recovered fragment measures approximately 10 centimetres (3.9 in) x 5 centimetres (2.0 in) x 6 centimetres (2.4 in). 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 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.

References

See also

• Glossary of meteoritics
• Meteorite

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