The West Qinling is one of the important metallogenic belts of endogenic deposit in China,where hundreds of polymetallic deposits such as copper,molybdenum,lead,zinc,gold and silver deposits have been discovered.The zircon U-Pb dating of the Dewulu and Meiwu rock bodies in the central part of the West Qinling yields ages of 241.6 Ma±5.3 Ma and 237.0 Ma±3.3 Ma,respectively,which belong to the early Mesozoic.The geochemical results indicate that the rocks have the characteristics of peraluminous calc-alkaline S-type granite,and display enrichment in light rare earth element,depletion in heavy rare earth element,and obvious negative Eu anomalies.According to the regional tectonic setting,it can be considered that the Dewulu-Meiwu area experienced a transition from extrusion to extension,accompanied by strong magmatic activity in the early Mesozoic,which provided a large amount of granitic magma and ore-forming materials for the West Qinling.