Chapter 18: Granitoid Rocks - Faculty web pages
Chapter 18: Granitoid Rocks - Faculty web pages
Chapter 18: Granitoid Rocks - Faculty web pages
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M-type– direct mantle source; includes both immature arcplutons and oceanic plagiogranites found in ophiolites-oceanic crust (White, 1979)A-type– anorogenic, , commonly intruded into non-orogenicorogenicsettings• generally higher in SiO 2 , alkalies, , Fe/Mg, halogens F andCl, Zr than I-typesI