Zircon SHRIMP U-Pb Dating and Mineralization Significance of Yinshanling Granite,Northeastern Guangxi Province

Yinshanling pluton is a small stock in the middle of Nanling metallogenic belt,internal of which exists a structural alteration-type Tin-polymetallic deposit.Zircon SHRIMP U-Pb dating of porphyrictic monzogranite therein shows Yinshanling stock formed at 426.3±4.2 Ma(MSWD=1.0),which similar to Haiyangshan batholith in the south,furtherly indicates they both were intruded in late Caledonian.Based on the geological investigate of Yinshanling deposit,the Yingshanling pluton is only the hostrock of this tin-polymetallic deposit,which was probably formed in Indonisian.