• 责任者：Wang Yonglei (Key Laboratory of Metallogeny and Mineral Assessment ; Institute of Mineral Resource ; Chinese Academy of Geological Sciences ; MRL ; Beijing 100037 ; China) ; Wang Denghong
• 刊名：Acta Geologica Sinica
• 出版年：2011
• 卷期：85(4)
• 关键词：花岗岩 ; granite ; 铀—铅计时 ; U-Pb dating ; 广西 ; Guangxi
• 页码：p.475-481
• 图表：3 illus., 1 table, 24 refs.
• 分类号：0801
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

Detailed zircon U-Pb age dating was conducted on the Qinjia granite. The zircons have high Th/U ratios (higher than 0.1) and show zonal structure, which indicates that zircons are magmatic in origin. The result indicates that the Qinjia granite is a complex massif and weighted average ²⁰⁶Pb/²³⁸U ages for zircons are (412.4±1.8) Ma, (434.8±1.7) Ma, and (442.4±1.8) Ma, suggesting the granite formed in Late Ordovician to Silurian, an important stage of Caledonian magmatic activity. This provides powerful evidence for further understanding the Caledonian magmatism and its geodynamic process in South China.