~(40)Ar-~(39)Ar dating of Yaoling tungsten deposit in northern Guangdong Province and SHRIMP U-Pb zircon age of related granites

The Yaoling tungsten deposit has two types of tungsten mineralization,i.e.,wolframite-quartz veins and scheelite skarn.The 40Ar/39Ar age of muscovite formed in the ore-forming period of wolframite-quartz veins is(149.44±0.73)Ma,consistent with large-scale tungsten and tin mineralization in Mesozoic Yanshanian period in South China,and this age represents the ore-forming time of wolframite-quartz vein deposits.The SHRIMP zircon age of the buried biotite plagioclase granite body related to mineralization of wolframite-quartz veins is(158±2)Ma,whereas the SHRIMP zircon age of Baijizhai biotite granite body related to mineralization of scheelite skarn is(158±1)Ma.The two ages are almost identical and represent crystallization age of the granite related to tungsten mineralization.In the ore district,there exist inherited zircon cores with ages of 182.3～189.8 Ma and 400.9～428.5 Ma respectively in Baijizhai biotite granite and buried biotite plagioclase granite,implying that the protolith of granites related to mineralization has igneous rock components of both early Yanshanian period and Caledonia period.