نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه زمینشناسی منابع معدنی و آب، دانشکده علوم زمین، دانشگاه شهید بهشتی، صندوق پستی: 69411-19839، تهران ـ ایران
2 پژوهشکده چرخه سوخت هستهای، پژوهشگاه علوم و فنون هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران- ایران
کلیدواژهها
عنوان مقاله English
نویسندگان English
The Sheikh Habil area lies 80km south of Dehdasht and is located in the southeast of Kohgiloyeh-Boyer Ahmad province, in the SW of Iran. Pabdeh Formation is located in Iran's Zagros structural zone. The host rocks of the area are Late Paleocene-Early Oligocene limestones, shales and marls. Calcite, fluorapatite, glauconite, quartz and clay minerals are the most observable minerals in these phosphorite rocks. The geochemical data show that the average contents of P2O5, U and ΣREE are 24.47%, 100ppm (with an enrichment factor of 46.54) and 189.18 ppm, respectively. The (La/Yb)N is 0.62-0.54 and the (LREE/HREE)N is 0.62-0.72. The studied samples have negative Ce anomaly which indicates the existence of an anoxic environment during the Sheikh Habil phosphate deposition. These ratios show relative enrichment in HREEs compared to LREEs. This data confirms that the Sheikh Habil phosphorites have high anomalies not only for P2O5 but also for U and HREEs. These data show that the other areas in the Pabdeh Formation could be good targets for P2O5, U and REEs.
کلیدواژهها English