نوع مقاله : مقاله پژوهشی
نویسندگان
استادیار، گروه زمینشناسی، دانشگاه پیام نور
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Deformed granitoid rocks from North Saman represent part of magmatic activity in Sanandaj-Sirjan during the Mesozoic. The granitoid rocks intruded as separate intrusions into metamorphosed rocks which have protolith ages of the Palaeozoic and Mezosoic. The intruded granitoid rocks have been deformed as a result of subsequent tectonic activities. Zircon U-Pb ages of crystals extracted from the granitoid rocks gave ages of 182 ± 4 Ma and indicate that the granitoid rocks crystallized in the Toarcian stage of the lower Jurassic. The major and trace element goechemistry suggests a subduction-related, active continental margin setting for the granitoid bodies. The occurrences of numerous Jurassic granitoids reveal the importance of magmatic activities of this period in the Sanandaj-Sirjan zone.
کلیدواژهها [English]
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