Chemical Composition of Meteorites



Ni vs. Fe2O3(T) + MgO




All chondrites and some achondrites have very much higher concentrations of Ni (also Co, Ir, Au, and some other rare elements) than nearly any terrestrial rock. Some of the rarer types of meteorites (lunar, martian, eucrites; bottom), however, do not have high concentrations of Ni. High-Ni terrestrial rocks tend to be ultramafic rocks like dunites, peridotites, pyroxenites, and serpentinites.



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Prepared by:

Randy L. Korotev

Department of Earth and Planetary Sciences

Washington University in St. Louis

Please don't contact me about the meteorite you think you’ve found until you read this and this.


Last revised:  7 November 2018