Objective The Miao’ershan–Yuechengling composite granite,located in northern Guangxi at the western section of the Nanling Range,is a multi-period and multi-stage composite pluton with an exposed area of more than 3000km2(Fig.1).Paleozoic and Proterozoic strata are exposed around it,and magmatic activities mainly occurred during Objective The Miao’ershan-Yuechengling composite granite, located in northern Guangxi at the western section of the Nanling Range, is a multi-period and multi-stage composite pluton with an exposed area of ​​more than 3000 km2 (Fig.1) .Paleozoic and Proterozoic strata are exposed around it, and magmatic activities mainly occurred during