Continental Arc Granitoids: case studies from Sinai

Год: 2012
Автор: Mohammed El-Bialy
Издательство: LAP Lambert Academic Publishing
Описание:
This book investigates the geology, petrology, geochemistry and petrogenesis of some old granite plutons in Sinai as a typical example for the orogenic continental arc granitoids. It presents comprehensive view on their field and petrographic characteristics including; country rocks, nature of contacts, outcrop morphology, mineralogy, texture, structure and enclaves and xenolithes. All of these granitic plutons have an explicit calc-alkaline nature, and a prevalent metaluminous character. Their magmatic evolution was interpreted in terms of simple fractional crystallization accompanied by slight mixing processes. Melt temperatures attained during their formation were estimated between 740-924C. They are distinguished as high-temperature tonalitic (Cordilleran) I-type granites that were derived by partial melting of infracrustal mafic M-type rocks of primitive island arcs, underplated beneath the crust in the deep crust or perhaps modified mantle. Paleotectonic environment…