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S-type granite
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S-type granite

geology
Also known as: S-type granitoid

Learn about this topic in these articles:

classification of granite

  • granite
    In granite

    …high amounts of Na2O, and S-type granitoids, derived from sedimentary protoliths and containing high amounts of Al2O3 and relatively low amounts of Na2O. Amphibole and pyroxene are more common in I-type granitoids, while S-type granitoids may have garnet, cordierite, and sillimanite. Both types of granitoids may also contain biotite and…

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  • temperature of Earth
    In igneous rock: Convergent plate boundaries

    The other type, called S-type granite, has muscovite and biotite and is depleted in sodium but enriched in aluminum such that corundum occurs in the norm and isotopic signatures. This suggests that such granites were formed by partial fusion of sedimentary rocks.

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