• 责任者：Mao Wei (State Key Laboratory of Ore Deposit Geochemistry ; Institute of Geochemistry ; Chinese Academy of Sciences ; Guiyang 550002 ; China) ; Li Xiaofeng
• 刊名：Acta Petrologica Sinica
• 出版年：2013
• 卷期：29(12)
• 关键词：多金属矿 ; polymetallic ores ; 铀—铅计时 ; U-Pb dating ; 广东 ; Guangdong
• 页码：p.4104-4120
• 图表：5 illus., 7 tables, 89 refs.
• 分类号：1001
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

     Dabaoshan polymetallic deposit is located at the middle part of the Nanling granite belt, South China, which is a famous large deposit with a long history of mining. Much attention has been paid to the Mesozoic magmatism because recent research reveals that Mo（W）-ore related porphyries are the product of Yanshanian magmatism, while little effort has been done on the other stage magmatism. Based on the previous study, zircon LA-ICP-MS U-Pb dating has been conducted on different stage granites and mafic dykes in order to systematically clarify the magmatic activity of the studied area. The weighted average 206Pb/238U age of Xuwu rhyolitic porphyry is 426.92.2Ma, and the weighted average 206Pb/238U ages are 162.20.7Ma, 160.20.9Ma and 161.20.9Ma for Jiuquling granodiorite porphyry, Chuandu granodiorite and Dabaoshan granodiorite porphyry, respectively. Two mafic dykes recorded two magmatic events of 210.41.4Ma and 163.91.8Ma, respectively. Therefore, it is proved that the Dabaoshan area has gone through a multiple magmatic activity including Caledonian, Indosinian and Yanshanian. Middle-Late Jurassic mafic magma might have contributed to the Dabaoshan polymetallic mineralization.