Zircon SHRIMP U-Pb dating and geological significance of granite in the Baogeda Ula Mo (W) mining area, Inner Mongolia, China
内蒙古宝格达乌拉钼(钨)矿区花岗岩锆石SHRIMP U-Pb年龄及地质意义

Its the first time that the zircon SHRIMP U-Pb dating of granite in the Baogeda Ula Mo (W) mining area which is found recently, and obtain the weighted average age of the nine zircons is 240.9±2.5Ma, the MSW is 1.7, Indosinian. According to the fieldwork and indoor studies, we could speculate that the extension of ancient land mass in Mesozoic occurred in this area. Large scale tectonic-magmatic activities and related to fluid which induced by the extension provide the material, power and heating sources for the deposit in Baogeda Ula Mo (W) mining area. The granite in this area is the result of tectonic-magmatic activities. Beyond that, we found the ore-bearing rock with complex lithological characters and some succession characters. It's because of that this area is at the junction after the subduction and collision between Early Siberian plate and the North China plate. Its also provide important reference for the genesis research of deposit in Erlianhaote-East Wuzhumuqinqi belt.