Geochemistry and zircon SHRIMP U-Pb dating of Mo-bearing granite bodies in Shuanghuang area, southern Zhejiang

Abstract：Based on regional geological survey of Shuanghuang area in southern Zhejiang Province, the authors carried out SHRIMP zircon U-Pb dating of the intrusion which has close relationship with the molybdenum mineralization. The result shows that the granite was formed at (126.9±3.5) Ma, i.e., in Early Cenozoic. The rock is rich in silicon, aluminum and alkali, relatively rich in potassium, depleted in sodium, low in calcium and magnesium, and has data SiO2=70.98%-73.92%, K2O=4.24%-5.12% and A/CNK = 1.34-1.82, suggesting peraluminous rock. The total rare earth elements show a moderate negative Eu anomaly, and on the whole present the distribution pattern of LREE enrichment and right-oblique ‘V’ shape. The trace elements features show that the intrusive is post-collision granite. Magma characterized by high silicon and high differentiation controls quartz vein type molybdenum deposits of this area.