Geochemical Characteristics and Metallogenic Significance of the X03 Vein Tourmaline in the Jiajika Rare Metal Deposit, West Sichuan

The Jiajika rare metal deposit contains the largest area of granitic pegmatite-type deposits in China. X03 vein is an immense dominated by lithium, which was found recent years. contact metamorphic belt tourmalinization and petrochemistry widely developed its wall rocks, altered rocks formed contain Li other mineralization. In this paper, tourmaline different divided into four types: two-mica quartz schist (Tur-Ⅰ), hornfels (Tur-Ⅱ), tourmaline-bearing granite pegmatite (Tur-Ⅲ) spodumene-bearing (Tur-Ⅳ); their situ major element, trace element boron isotope data are systematically studied. results show that all tourmalines belong to alkali group, schorl–Oxy/Fluor–schorl, dravite–Hydroxy-dravite foitite–Oxy foitite solid solutions, among Tur-Ⅰ dravite, Tur-Ⅱ hydrothermal origin Tur-Ⅲ Tur-Ⅳ schorl magmatic origin. values involved formation process mainly originates from Majingzi S-type granite, variations controlled melt fluid Rayleigh fractionation. Moreover, there a clear correlation between B value Li, Mn, Zn, Mg, V contents, showing these contents good indicators mineralization type pegmatite.