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S-type granite

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Granitoid rocks derived from sedimentary source rocks, usually peraluminous, with muscovite and Al-rich minerals like garnet, cordierite and andalusite.


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Classification of S-type graniteHide

Rocks in sections 2,3,4 and 5 of the QAPF diagram.

Mineralogy of S-type graniteHide

Essential minerals - these are minerals that are required within the classification of this rock:
FeldsparA petrological term for Feldspar Group.
Silica > QuartzSiO2
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
AndalusiteAl2(SiO4)O
Cordierite(Mg,Fe)2Al3(AlSi5O18)
Garnet GroupX3Z2(SiO4)3
Mica > MuscoviteKAl2(AlSi3O10)(OH)2

Internet Links for S-type graniteHide

Mineral and/or Locality  
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