Chassigny (meteorite)

Summary

Chassigny meteorite
Chas3.jpg
Thin section of Chassigny under cross-polarized light (JPL)
TypeAchondrite
ClassMartian meteorite
GroupChassignite
Parent bodyMars
CountryFrance
RegionChassigny, Haute-Marne
Coordinates47°43′N 5°23′E / 47.717°N 5.383°E / 47.717; 5.383Coordinates: 47°43′N 5°23′E / 47.717°N 5.383°E / 47.717; 5.383[1]
Fall date1815-10-03
Commons page Related media on Wikimedia Commons

Chassigny is a Mars meteorite which fell on October 3, 1815, at approximately 8:00 am, in Chassigny, Haute-Marne, France.[2][3] Chassigny is the meteorite for which the chassignites are named, and gives rise to the "C" in SNCs. Chassigny is an olivine cumulate rock (dunite). It consists almost entirely of olivine with intercumulus pyroxene, feldspar, and oxides. Chassigny was the only known chassignite until NWA2737 was found in the Moroccan Sahara in northwest Africa.[4]

Mars meteorite rock, in Vienna science Museum.

Chassigny is particularly important because, unlike most SNCs, its noble gas composition differs from that in the current Martian atmosphere. These differences are presumably due to its cumulate (mantle-derived) nature.[5]

See also

References

  1. ^ Meteoritical Bulletin Database: Chassigny
  2. ^ Pistollet (1816) The circumstances of the Chassigny meteorite shower. Ann. Chim. Phys. (Paris) v. 1, pg 45-48.
  3. ^ "The Chassigny Meteorite" - From NASA's Jet Propulsion Laboratory, stating it is the only example. URL accessed September 6, 2006.
  4. ^ Beck P., Barret J. A., Gillet P., Franchi I.A., Greenwood R. C., Van De Moortele B., Reyard B., Bohn M. and Cotton J. (2005) The Diderot Meteorite, the second chassignite.Lunar and Planet. Sci. XXXVI, Abstract #1326.
  5. ^ Mars Meteorite Compendium: Chassigny, Compiled by Charles Meyer.