Study of Sr-Nd isotopes in volcanic rocks, north of meymeh Isfahan province
Subject Areas :Mohammad Ali Aliabadi 1 , Mahnaz Khodami 2
1 - مربی دانشگاه آزاد اسلامی واحد محلات
2 - استادیار دانشگاه آزاد اسلامی واحد محلات
Keywords: Sr radiogenic isotopes, Nd radiogenic isotopes, enriched mantel,
Abstract :
Pliocene and younger volcanic rocks are exposed in 120km northwest of Isfahan in urumieh-dokhtar magmaticbelt in centeraliran structural zone. Petrographical and geochemical studies show these rocks arecalcalkaline andconsist of Rhyodacite, Dacite, Andesite and Trachyandesite.Sr_Nd radiogenic isotopes used to interpretation ofpetrogenesis and tectonic setting, show a mantel array or near enrichmentedmantelEMlltype,sourcefor thisrocks.The enrichment can result of crust contamination or source metasomatism caused by subduction zonefluids.The absence of significance increase in Nd isotopes and significance decrease in Srisotopes show thatmelt don’t contaminated with lithosphere during upwarding.