Qooshchi granite has been intruded as an anorogenic, A type, within
plate granite in an area north west of Orumieh Lake in western
Azerbaijan, northwest Iran. The Precambrian crystalline basement has
been intruded by gabbros and diorites. The gabbros are tholeiitic and
metaluminous and are suggested to have been converted into alkalic
through calc-alkalic compositions during K- and Si-metasomatism.
The resulting granitic rocks (leucometasomatites) appear as apophyse-like
bodies within the gabbros and in the marginal parts of Qooshchi
granite. Any further rise in the temperature could have caused melting
of the metasomatized rocks and their subsequent recrystallization as
pink Qooshchi granite
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