Chemical Composition of Meteorites



Cr vs. Fe2O3(T) + MgO


One of the best elements for distinguishing meteorites from Earth rocks is Cr. Nearly all stony meteorites have high concentrations of Cr compared to most Earth rocks. The most Cr-poor meteorites are the feldspathic lunar meteorites, which have high concentrations of Al2O3 and CaO. Cr-rich 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