Granites and Granitic Rocks

Granites and Granitic Rocks - GLY 441: Igneous &...

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El-Shazly, A. K., 2004 Granites and Granitic Rocks (Reading: Winter p. 343 -358) General features of Granitoids: Occurrence and Abundance Field relations Batholiths, stocks, and cupolas. Ptygmatic folds. Enclaves and inclusions: Xenoliths, xenocrysts, autoliths, and schlieren. Relationships to pegmatites and aplites. Mineralogy: Aside from the essential minerals K-spar, Plag, Qz, ± Bt ± Hb ± Musc, there are some odd minerals that can become important in some granites. These include: Cpx (usually aegirine – augite in peralkaline granites), other amphiboles (riebeckite and arfvedsonite in peralkaline granites), Opx (in anhydrous granitoids called charnockites), and Fa (in shallow intrusions and their rhyolitic equivalents). Accessory phases: Ap, Ttn, Zrn, Py, Ilm, Sill, Crd, Gt (Spessartine – rich), Tm and Fluorite.
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This note was uploaded on 02/28/2012 for the course GLY 421 taught by Professor Staff during the Fall '11 term at Marshall.

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Granites and Granitic Rocks - GLY 441: Igneous &...

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