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Chassigny Martian meteorite, Chassigny, Haute-Marne, Grand Est, France

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Latitude & Longitude (WGS84): 47° 43' North , 5° 22' East
Latitude & Longitude (decimal): 47.71667,5.36667
GeoHash:G#: u07z6necs
Locality type:Meteorite Fall Location
Meteorite Class:Chassignite meteorite
Meteoritical Society Class:Martian (chassignite)
Metbull:View entry in Meteoritical Bulletin Database
Origin locality:Mars
Köppen climate type:Cfb : Temperate oceanic climate
Other/historical names associated with this locality:Champagne-Ardenne

Martian Meteorite (dunite), Chassignite Prototype
Fell, 3 October 1815; 4 kg

After detonations, one stone was recovered and stored for posterity. Chassigny is compositionally dominated by olivine (Fa32), but contains several minerals indicative of its original mafic/ultramafic origins in a moderately hydrous and moderately oxidized environment. These features are significantly different from most igneous, differentiated meteorites ['achondrites'] apparently from several airless worlds (including Vesta and the moon). Augite, chromite, rutile, spinel, and several other accessories to the dominant olivine bespeak an original origin at some depth in a magma chamber. Amphiboles (e.g. kaersutite) and the particular sulfides (pentlandite, pyrite, marcasite) are much more typical of earth-like environments than of the original parent bodies (OPB) of most achondrites. Chassigny, however, is not an earth rock. Its oxygen isotope ratios make it a member of the Shergotty-Nakhla-Chassigny (SNC) Clan. And the SNC Clan are Martian Meteorites - a conclusion first established when it was discovered that several of the meteorites contained small gas inclusions virtually identical to those detected by the Viking Landers in the Martian soils.

Chassigny was the first Martian meteorite to be discovered and is now regarded as the prototype for three martian 'chassignites.' The chassignites are only a small subset of the nearly 150 martian meteorites identified by 2015. Some shock features and melt inclusions appear to be derived from (at least one) impact events. Curiously enough, however, while the chassignites appear to have been derived from deep beneath the Martian crust, they are generally not as shocked as some of the Martian shergottites produced nearer to the Martian surface.

Mineral List

22 valid minerals.

Meteorite/Rock Types Recorded

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Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

145 - 201.3 Ma

ID: 3185222
Mesozoic sedimentary rocks

Age: Jurassic (145 - 201.3 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Early Jurassic
174.1 - 201.3 Ma

ID: 3148036
mostly detrital deposit

Age: Early Jurassic (174.1 - 201.3 Ma)

Lithology: Major:{sandstone}, Minor{siltstone,dolomite/dolostone,conglomerate}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


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Mason, B., Nelson, J. A., Muir, P., & Taylor, S. R. (1976). The composition of the Chassigny meteorite. Meteoritics 11(1): 21-27.
Floran, R. J., Prinz, M., Hlava, P. F., Keil, K., Nehru, C. E., & Hinthorne, J. R. (1978). The Chassigny meteorite: A cumulate dunite with hydrous amphibole-bearing melt inclusions. Geochimica et Cosmochimica Acta, 42(8), 1213-1229.
McSween, H.Y.,Jr. (1987) Meteorites and their Parent Planets. Cambridge University Press: Cambridge, New York, Melbourne 237 pp.
McSween, H.Y.,Jr (1994). What we have learned about Mars from the SNC Meteorites: Meteoritics 29(6): 757-779. (Nov 1994)
Wentworth, S. J., & Gooding, J. L. (1994). Carbonates and sulfates in the Chassigny meteorite: Further evidence for aqueous chemistry on the SNC parent planet. Meteoritics 29(6): 860-863. (Nov 1994)
Langenhorst, F. & Greshake, A. (Jan 1999) A transmission electron microscope study of Chassigny: Meteoritics & Planetary Science 34 (1):43-59. (Jan 1999).
Grady, M. M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.
McSween, H. Y. Jr. (2002) The rocks of Mars, from far and near. Meteoritics & Planetary Science 37 (1): 7–25. (Jan 2002)
McCubbin, F. M., & Nekvasil, H. (2008). Maskelynite-hosted apatite in the Chassigny meteorite: Insights into late-stage magmatic volatile evolution in martian magmas. American Mineralogist, 93(4), 676-684.

External Links - Chassigny@MetBullDatabase

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