زمین شیمی مقایسه ای عناصر نادر خاکی در آپاتیت و مگنتیت معادن

REE content and distribution in apatite and magnetite of Choghart and Esfordi deposits is investigated.REE concentration in different ore types display characteristic patterns,related to different modes of formation of the ore. The apatites of the study area,show, a strong LREE/HREE ratio,a pronounced negative Eu and Tm anomalies, and slightly positive Ce anomaly.The REE distribiution in apatites of both deposits is similar, indicating a common origin.REE content in the Choghrat and Esfordi magnetite is high and also,they have similar approximatly characteristic and patterns.These evidences suggest a similar origin.