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چکیده
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The geology of Iran is important because it has the characteristics of continent-continent collision (Morley et al., 2009). The ongoing collision between the Arabian and Eurasian plates produced the Zagros Orogen (e.g., Stöcklin, 1968). The Zagros Orogen extends from the Turkish–Iranian border in the NW to the Makran area in the SE and it is subdivided into three parts: the Urumieh-Dokhtar Magmatic Arc (UDMA), the Sanandaj-Sirjan Zone (SaSZ), and the Zagros Fold and Thrust Belt (ZFTB) (e.g., Stöcklin, 1968; Berberian and King, 1981; Alavi, 1994; Agard et al., 2005; Mirnejad et al., 2019; Lustrino et al., 2021; Salehi et al., 2023; Shirmaohammadi et al., 2023).There has been considerable debate about the relationships between magmatism and the time of final collision of Arabian and Eurasia plates. The UDMA is considered to have formed from a voluminous, and distinctly linear, Andean-style magmatic arc system (Dewey et al. 1973) that formed on the active SW margin of the Iranian plate during the Cenozoic (Arvin et al. 2007). Omrani et al. (2008) subdivided the UDMA volcanic rocks into an older Eocene suite and a younger upper Miocene to Plio-Quaternary suite. The Middle Eocene was thought to include the peak of magmatic activity in the region (Berberian and King 1981; Ghasemi and Talbot 2006). The Miocene igneous rocks of the UDMA were considered to mark the continental collision between Arabia and Eurasia (Berberian and King 1981; Ballato et al. 2011; Mohajjel and Fergusson 2014; Lustrino et al., 2021). The Kahak dykes is located in the central part of the northeastern margin of the UDMA. The geologic importance of this belt (UDMA) to the geotectonic evolution is well known and that petrology was first studied in this area further warrants a more detailed analysis of this region. Therefore this paper focuses on further describing the petrology and geochemistry attributes of the Kahak dykes to interpret the key magmatic processes involved in its genesis. Before this,
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