Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Peridotite

  • Nicholas Arndt
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_1168-3

Definition

Peridotite is an ultramafic (silica-poor, magnesium-rich) intrusive rock. It is coarse-grained and pale to dark green and is composed of >90 % mafic (ferromagnesian) minerals: typically olivine, orthopyroxene, and clinopyroxene. Minor phases include plagioclase, spinel or garnet, amphibole or biotite, and Fe-Cr-Ti oxides. Peridotite is the dominant component of the upper mantle of the Earth and other planets and is thus the most common rock in the Solar System. Peridotite is also found as main component of some shergottites, one of the classes of Martian SNC meteorites.

See Also

Keywords

Bioorganic Chemistry Solar System Minor Phase Intrusive Rock Dominant Component 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Maison des GéosciencesLGCA, Université J. FourierSt-Martin d’HèresFrance