地质学报2011，Vol.85Issue(4)：475-481,7.DOI:CNKI:11-1951/P.20110330.0840.019
广西钦甲花岗岩体单颗粒锆石LA-ICP-MS U-Pb定年及其地质意义
LA-ICP-MS Zircon U-Pb Dating of the Qinjia Granite in Guangxi Province and Its Geologic Significance
摘要
Abstract
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.Our 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.关键词
锆石LA-ICP-MS U-Pb定年/广西/加里东期花岗岩Key words
LA-ICP-MS/ zircon U-Pb age/ Guangxi Province/ Caledonian引用本文复制引用
王永磊,王登红,张长青,侯可军,王成辉..广西钦甲花岗岩体单颗粒锆石LA-ICP-MS U-Pb定年及其地质意义[J].地质学报,2011,85(4):475-481,7.基金项目
本文为全国危机矿山接替资源找矿项目(编号20089946)和中央级公益性科研院所基本科研业务费专项资金(编号 K0907)资助成果. （编号20089946）
