“…Granitic plutons are predominantly composed of syenites, nepheline syenites, aegirine syenites, twomica peraluminous leucogranites and A-tpe rapakivi granites, which have zircon U-Pb ages between 304 Ma and 273 Ma (Liu et al, 2004;Konopelko et al, 2007;Solomovich, 2007;Zhu et al, 2008;Long et al, 2008;Seltmann et al, 2011;Huang et al, 2012). Several Early Paleozoic granitic intrusions (490-387 Ma) were exposed in the eastern segment of the STB (Hopson et al, 1989;Han et al, 2004;Xu et al, 2006;Zhu et al, 2008;Wang et al, 2009b;Ge et al, 2012;Guo et al, 2013;Jia et al, 2013).…”