Abstract: (142 Views)
The Baghijan diapir complex is located in the south of Ravar County in the Central Iran structural zone. This diapir complex is located in the form of a fault on the border with Cretaceous carbonate rocks, which includes a set of igneous, metamorphic and sedimentary rocks. The igneous rocks of this diapir complex mainly include volcanic rocks of the basalt, andesite-basalt, andesite, trachy-andesite, along with the main minerals pyroxene and plagioclase. Also, the volcanic rocks trachyte, rhyolite and dacite are mainly composed of plagioclase, quartz and potassium feldspar minerals. Monzonite and granodiorite rocks are also present as intrusive rocks forming this area, and coarse plagioclase and quartz minerals are formed as the main minerals in these rocks. Porphyric, glomeroporphyritic, sieve, trachytic, intergranular and myrmekite textures are among the most important textures forming the igneous rocks of the Baghijan diapiric complex. Geochemical evidence shows that the magma forming the rocks of the Baghijan diapiric complex was derived from the differentiation of a mafic magma from the mantle. The main and minor elements of the studied rocks have basaltic and alkaline basaltic compositions and are often in the alkaline range. The use of tectonic environment detection diagrams shows that the rocks of the Baghijan diapiric complex are oceanic island basalts or intracontinental alkaline magmatic rocks associated with intracontinental rifts that erupted in an extensional tectonic environment and show post-collision magmatism
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