Genesis of the Tashan porphyry host tin deposit, eastern Guangdong, Southeast China: Constrains from geology, geochronology, and geochemistry

•The mineralization at Tashan is related to the granite porphyry, and both of them formed at ca. 138 Ma.•The granite porphyry is an A-type granite mainly produced from partial melting of crust with minor contribution of mantle materials.•Both the granite porphyry and the mineralization formed in an extensional setting induced by slab roll-back.