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| Mineralogical-Geochemical Characteristics and Ore Potentiality Studies of Pegmatite in Southern Margin of the Mufushan Area, Hunan province |
| WEN Chun-hua |
| Institute of Geological Survey, Changsha 410116, China |
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Abstract Pegmatite is widespread in southern margin of the Mufushan area. Mineralogy, major and rare metal elemental geochemistry of pegmatite have been carried out in this study in order to investigate ore potentiality of pegmatite and further to give assistance for rare metal explortion in the region. These pegmatites have high SiO2(71.27%~76.93%), variable Na2O(0.68%~7.99%), K2O(0.74%~10.62%),K2O/Na2O(0.09-13),Nb/Ta(0.2-4.7), K/Rb ratios(25.42-139.02). Whole rock geochemistry and mineral association suggest that these pegmatites have been subdivided into five different types:Potash pegmatite(Ⅰ), plagioclase pegmatite(Ⅱ)with xenotime and monazite mineralization, plagioclase-albite pegmatite(Ⅲ), albite pegmatite(Ⅳ)and albite-spodumene pegmatite(Ⅴ)with beryl, spodumene and niobium-tantalum mineralization. It is believed that rare metals mineralization is caused by albitization and spodumenization, which can be used as vector for ore prospecting.
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Received: 14 March 2016
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