华南地质与矿产Issue(4)：342-351,10.DOI:10.3969/j.issn.1007-3701.2014.04.005
广西大瑶山古罗碱性辉长岩体 LA-ICP-MS 锆石 U-Pb 年龄、岩石学、地球化学及其构造意义
Zircon LA-ICP-MS U-Pb age, petrog-raphy, geochemistry and tectonic implications of the Guluo alkaline gabbroic rock in the Dayaoshan, Guangxi
摘要
Abstract
Guluo alkaline gabbroic magmatic rocks including Guluo and Huangqiangchong intrusive rocks are comprising of gabbro, quartz-gabbro (or quartz-diorite). These rocks are enriched in alkalies, LILE, LREE and HFSE, characteristed by no Nb and Ta anomalies, which indicates belongs to typical intrapate-shoshonite series. Zircon LA-ICP-MS U-Pb dating of Guluo alkaline gabbroic rocks yields the 206Pb/238U age of 165.63±0.95 Ma. The geochronology data suggests that Guluo alkaline gabbroic rocks as typical intrapate-shoshonite series was formed in the Middle Jurassic Period, and indicated that the magma was generated in the tectonic settings of con-tinental crust extension and thinning, which records post-orogenesis event of South China in the Early Yanshan-nian period.关键词
岩石地球化学/LA-ICP-MS 锆石 U-Pb 年龄/碱性辉长岩体/广西大瑶山Key words
petrogeochemistry/zircon LA-ICP-MS U-Pb ages/alkaline gabbroic rock/Dayaoshan分类
地质学引用本文复制引用
许华,黄炳诚,倪战旭,韩淑朋,黄英,龚云..广西大瑶山古罗碱性辉长岩体 LA-ICP-MS 锆石 U-Pb 年龄、岩石学、地球化学及其构造意义[J].华南地质与矿产,2014,(4):342-351,10.基金项目
中国地质调查局地质矿产调查评价专项 （）
