中山大学学报（自然科学版）Issue(1)：131-136,6.DOI:10.13471/j.cnki.acta.snus.2016.01.022
广东连平大顶铁矿区石背岩体 LA-ICP-MS锆石 U-Pb 年龄及地质意义
LA-ICP-MS zircon U-Pb dating of Shibei pluton at Dading iron mine area in Lianping,Guangdong and its geological significance
摘要
Abstract
Dading iron mine in Lianping,Guangdong province is well known as the largest iron ore de-posit,and is also the most typical skarn type deposit in South China.The LA-ICP-MS zircon U-Pb age of coarse-grain porphyritic biotite granite and medium-grain porphyritic biotite granite from Dading pluton, closely related to mineralization in Dading mining area,are (174.3 ±3.6)Ma (MSWD =1.6)and (176.9 ±4.3)Ma (MSWD =2.6),respectively,and it shows the emplacement age of Shibei pluton belonged to the early Jurassic-middle Jurassic,and it was the product of the first magma activity of yans-hanian period.The Shibei pluton was formed in extrusion tectonic setting,in the process of subduction of the Pacific plate under Eurasian plate in the early Mesozoic.Its source mainly from crust,formed by crustal material melting and magma consolidation,similar to the Fogang pluton,is crustal transformation type (S-type)granite.关键词
LA-ICP-MS锆石U-Pb年龄/地质意义/大顶铁矿/石背岩体Key words
LA-ICP-MS zircon U-Pb dating/geological significance/Dading iron mine/Shibei pluton分类
天文与地球科学引用本文复制引用
林小明,李宏卫,黄建桦,娄峰..广东连平大顶铁矿区石背岩体 LA-ICP-MS锆石 U-Pb 年龄及地质意义[J].中山大学学报（自然科学版）,2016,(1):131-136,6.基金项目
国土资源部中国地质调查局公益性行业基础地质调查专项资金资助项目 （）
