Chemical Composition of Meteorites

Lanthanum and Other "Incompatible Elements"
La vs. Fe2O3(T) + MgO


Lanthanum is one of many chemical elements that geochemists call "incompatible elements." Others that commonly appear in reports of rock analyses are Y, Zr, Nb, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, Th, and U. Incompatible elements tend to be in higher concentrations in Earth rocks than in meteorites. Among meteorites, only some from the Moon have concentrations in the range of typical terrestrial igneous rocks.

See Notes, Caveats, and References

see also "Rare Earth Elements (REE) in Lunar Meteorites"


Plots for

| SiO2 | Al2O3, CaO, & CaO/Al2O3 | MgO/Fe2O3 | Fe2O3/MnO | Na2O & K2O |

| Cr | Ni | La |



Back to: Chemical Composition of Meteorites

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.