سنگ شناسي ژئوشيمي و جايگاه زمين ساختي - ماگمايي توده آذرين نفوذي سيليجرد، شمال باختر ساوه

Petrology, Geochemistry and Tectonomagmatic Setting of the Silijerd Intrusion, Northwest Saveh

Silijerd intrusion with an age of Late Eocene - Oligocene (39.2 ± 3.2 Ma) is located in Uromeyeh-Dokhtar magmatic arc, central Iran structural zone, northwest Saveh. This intrusion is composed of a continuous compositional range including: diorite/gabbro, granodiorite, syeno-monzogranite and alkali granite intruded into the Eocene volcanic and pyroclastic rocks.Variation diagrams showing trends of major and trace elements indicate a continuous compositional range and a comagmatic origin for these rocks. Trends of compatible- incompatible elements indicate the important role of fractional crystallization in the genesis of these rocks. All samples are metaluminous with medium-high K with calc-alkaline nature. High values of Rb, Sr, K, U, Th, Zr and Ba and Times New Roman