Mineralogy, fluid inclusion and isotope signatures: Implications for the genesis of the Early Paleozoic Yangjiashan scheelite-quartz vein deposit, South China

•Magmatic fluid mixing with mantle-derived components and meteoric water were involved in the formation of scheelite-quartz vein deposit.•Fluid pH changes is responsible for scheelite precipitation.•No significant homogenization temperature gap between scheelite and quartz.