Kainsaz meteorite
{{Short description|Meteorite found in Russia}}
{{Infobox meteorite
|Name = Kainsaz
|Alternative names =
|Image = Kainsaz meteorite small.jpg
|Image_caption =
|Type = Chondrite
|Class = Carbonaceous chondrite
|Clan = CM-CO
|Group = CO3.2
|Grouplet =
|Subgroup = 3
|Structural_classification =
|Parent body =
|Composition =
|Shock = 2
|Weathering =
|Country = Russia
|Region = Kainsaz, Muslyumovo, Tatarstan
|Lat_Long = {{coord|55|26|N|53|15|E|display=inline,title}}
|Observed_fall = Yes
|Fall_date = 1937-09-13
|Found_date =
|TKW = {{Convert|200|kg}}
|Strewn_field = Yes
|Image2 = Kainsaz meteorite, CO3.2.jpg
|Image2_caption = This partial slice has fusion crust along 2 edges and weighs {{convert|4.04|g}}.
}}
Fifteen pieces of the Kainsaz meteorite were seen to fall near Kainsaz, Muslyumovo, Tatarstan on September 13, 1937.{{cite journal|last=Millman|first=P. M.|title=News from the Soviet Union Concerning Meteoric Research|journal=Journal of the Royal Astronomical Society of Canada|date=Oct–Dec 1938|volume=33|pages=51|url=http://www.fallsandfinds.com/kainsaz.php|access-date=11 January 2013}} The largest weighed {{convert|102.5|kg}}, the total weight was ~{{Convert|200|kg}}.{{cite web|title=Kainsaz CO3.2 Carbonaceous Chondrite Meteorites for Sale|url=http://www.meteoritemarket.com/KAI.htm|publisher=The Meteorite Market|access-date=11 January 2013}}{{cite web|title=Kainsaz|url=http://www.lpi.usra.edu/meteor/metbull.php?code=12229|work=Meteoritical Bulletin Database|publisher=Meteoritical Society|access-date=11 January 2013}} {{As of|January 2013}} pieces were on sale for ~{{US$|100}}/g. Kainsaz is the only observed fall in Tatarstan.
History
A fireball was observed which left a dust train and broke into fragments during flight in a series of detonations that were heard up to {{convert|130|km}} away. The strewn field of {{convert|40|x|7|km}} was oriented SE-NW with the largest stone falling at the NW end, the smallest (the size of a nut) near the village of Kosteevo at the SE end.
Mineralogy
Most of the chondrules (90 %) are either droplet (39 %) or lithic (61 %). The remaining 10 % are barred olivine, radial pyroxene, cryptocrystalline, glassy, sulfide-metal, micro-poikilitic and complex chondrules.{{cite web|last=Stakheeva|first=S. A.|title=Chondrules in the Kainsaz CO chondrite|url=http://www.lpi.usra.edu/meetings/lpsc1987/pdf/1024.pdf|access-date=12 January 2013}}
Classification
Kainsaz is classified as a CO3.2. This stands for CO group, petrologic type = 3, and subtype = 2. The group is part of the CM-CO clan and a member of the carbonaceous chondrites.