Authors
1
Department of Geology of Minerals and Water Resources, Shahid Beheshti University
2
Department of Geology, Faculty of Earth Sciences, Shahid Beheshti University
3
Department of Geology of Minerals and Water Resources, Shahid Beheshti University, Iran
4
Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI, Iran
5
Atomic Energy Organization of Iran
Abstract
Chapdoni-Posht-e-Badam complex is located in the structural zone of Central Iran and in the northeast of Yazd province. The study area is one of the areas with high potential for mineralization of rare earth elements. In this research, to investigate the mineralogy and mineralization of rare earth elements, field studies, mineralogy with transmission-reflection light microscope, electron microscope and X-ray diffraction method (XRD), chemical analysis by ICP-MS method have been used. After the studies, the results of studies show the enrichment of rare earth elements in the area. In between, Ce elements with an average grade of 1353 ppm, La with an average grade of 745 ppm, and Y with an average grade of 252 ppm from 170 analyzed samples have high enrichment and Dy-Sm-Gd-Yb-Er elements show slight anomalies.Gneiss, granite, granite-gneiss, magmatite and schist are the most important host rocks for mineralization in the area. These rocks are mainly altered and metamorphosed. The Metasomatization of the host rock is one of the most obvious evidence of alteration for the enrichment of rare earth elements. Different types of minerals have been identified in the region, the main minerals of which are rare earth elements including Bastnasite, Monazite and Allanite. Minerals that can contain trace amounts of rare earth elements include Thorite, Zircon, Uranothorite, Apatite, Fluoroapatite, and Titanite. Tourite and Uranothorite minerals, which are parageneses with rare earth element mineralization, can be considered as tracer minerals of mineralization in the region, and gamma radiometric method can be used to trace and explore the mineralization zones of rare earth elements.
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