华南地质与矿产2017，Vol.33Issue(4)：330-343,14.DOI:10.3969/j.issn.1007-3701.2017.04.002
东秦岭镇平地区花岗岩岩石地球化学特征及地质意义
Lithogeochemical characteristics and geological significance of granitoids in Zhenping area, Eastern Qinling Mountains
摘要
Abstract
Shimen and Wuduoshan granitoid are located in Zhenping area,east segment of North Qinling orogenic belt,intruding into the Erlangping Group.The ages of the Shimen granitoid obtained by LA-ICP-MS zircon U-Pb dating is 428.3±2.1 Ma,the age of Wuduoshan granitoid is 414.5±2.3 Ma.The two granitoid are all biotite gran-ite.Geochemical properties show that both Shimen and Wuduoshan granitoid belong to I type,and both of the ones have weak Eu negative anomaly.Lithogeochemical characteristics suggest that material sources of the two grani-toid may be both from crust,possibly participated by small amounts of mantle material.Based on chronology char-acteristics and regional geological analyses, the authours consider that the granitoid of Shimen and Wuduoshan are ralated to the subduction of North China block to Yangtze block in early Paleozoic. The Shimen granitoid formed during the ulifting period of the collision, while the Wuduoshan granitoid formed during the late of the plate collision.关键词
花岗质岩体/锆石U-Pb定年/构造意义/东秦岭Key words
granitoid body/U-Pb zircon dating/tectonic significance/east Qinling belt分类
地质学引用本文复制引用
赖亚,赵国春,李文兰,赖群生,樊中玲,易志强,文景..东秦岭镇平地区花岗岩岩石地球化学特征及地质意义[J].华南地质与矿产,2017,33(4):330-343,14.基金项目
2008年度河南省地质勘查基金(周转金)招标项目(豫国土资发[2009]93号)镇平县幅、石门幅、安皋幅1:5万区域地质、区域矿产调查 （周转金）
项目编号:ZB[2009]57-5. （）
