Pallasovka (meteorite)

Meteorite
Name= Pallasovka


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Type= Stony-iron
Class= Pallasite
Group= Main Group Pallasite (anomalous)
Structural_classification=
Composition= Olivine: Fe/Mn = 45.2, Fe/Mg = 0.14; Metal: Fe 86 wt%, Ni 13.1 wt%, Ir 0.12 ppm, Au 2.8 ppm, Pt 3.2 ppm, Ga 22.5 ppm, Ge 24.9 ppm
Shock=
Weathering=
Country= Russia
Region= Volgograd Oblast
Lat_Long= coord|49|52|0|N|46|36|42|E|display=inline,title [http://tin.er.usgs.gov/meteor/metbull.php?sea=Pallasovka+&sfor=names&ants=&falls=&stype=contains&lrec=50&
] ]
Observed_fall= No
Fall_date=
Found_date= July 1990
TKW= 198 kg


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Pallasovka is a pallasite meteorite found in 1990 near town of Pallasovka, Russia.

History

One single mass of 198 kg was found 27.5 km from the town of Pallasovka by N. F. Kharitonov (a local resident) on a dyke on the edge of an artificial water reservoir. The pond and dyke were built in 1978 using explosives so the mass has probably been lifted to the surface from a depth of about 2 m. In fall 2004, Kharitonov gave a small sample to A. E. Milanovsky who transferred it to the Vernadsky Institute (Moscow) and then proved its meteoritic origin.

Pallasovka and Peter Pallas

The town of Pallasovka was named after Peter Pallas (1741-1811), a famous naturalist who took part in the discovery and the study of the first pallasite, a type of stony-iron meteorite named after him. Coincidentally, Pallasovka is a pallasite meteorite named after a town named after the discoverer of pallasites.

Composition and classification

This pallasite consists of approximately equal parts of olivine and metal. Some olivine crystals reach a size of 3 cm. Its composition is similar to the Main Group pallasites, however it is called anomalous because chromites differ in composition both from that of the Main and Eagle Station pallasite groupsD. A. Sadilenko, S. E. Borisovskiy, A. V. Korochantsev, A. M. Abdrakhimov, M. A. Ivanova, D. I. Zhuravlev. [http://www.lpi.usra.edu/meetings/lpsc2006/pdf/1623.pdf "Discovery, Petrography, Mineralogy, and Chemistry of Pallasovka, a New Pallasite from Russia"] . 37th Lunar and Planetary Science Conference (2006), Abstract #1623] .

pecimens

The main mass has abundant rusty fusion crust with some regmaglypts and was held by an anonymous purchaser.A 9336 g sample and one polished section are on deposit at Vernad.

Notes and references

See also

* Meteorite

External links

* [http://www.meteorites.com.au/favourite/november2007.html Meteorites Australia: Pallasovka]