Petrogenesis of the early Paleozoic strongly peraluminous granites in the Western South China Block and its tectonic implications

Strongly peraluminous (SP) granites have A/CNK (molecular Al2O3/(CaO+Na2O+K2O)) ratios >1.1, indicating a predominant origin from the partial melting of metasedimentary rocks. However, an increasing number of studies have documented that mantle-derived magmas can also be involved in the petrogenesis of some SP granites. This is the case in the Dulong batholith in the southeastern Yunnan province, southwestern South China Block, which is...