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Anorthosites pp 343-350 | Cite as

Synthesis and Summary

  • Lewis D. Ashwal
Part of the Minerals and Rocks book series (MINERALS, volume 21)

Abstract

Although prevalent in some planetary crusts such as that of the Moon (and possibly Mercury), anorthosites are not abundant on Earth, except in a few places like the Grenville Province of the eastern Canadian Shield. Nevertheless, terrestrial anorthosites are distinctive, and may be classified into at least five separate types: (1) Archean megacrystic, (2) Proterozoic massif-type, (3) those in layered mafic intrusions, (4) oceanic, and (5) inclusions in other igneous rocks.

Keywords

Continental Crust Parental Magma Mafic Magma Plagioclase Composition Calcic Plagioclase 
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.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • Lewis D. Ashwal
    • 1
  1. 1.Department of GeologyRand Afrikaans UniversityJohannesburgSouth Africa

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