华北陆块东南缘蚌埠地区花岗岩与相关脉岩^(40)Ar-^(39)Ar定年  

^(40)Ar-^(39)Ar dating of granites and related dikes in the Bengbu area on the southeastern margin of the North China block

作　　者：徐祥[1] 侯明金[1] 邱瑞龙[1] 吴礼彬[1] 李建设 

机构地区：[1]安徽省地质调查院,安徽合肥230001 [2]安徽省地质调查与环境监测中心,安徽合肥230001

出　　处：《中国地质》2005年第4期588-595,共8页Geology in China

基　　金：安徽省地质矿产勘查局(地计1998-269)项目部分成果

摘　　要：本文运用40Ar-39Ar定年技术,对蚌埠地区花岗岩及相关脉岩的形成年龄进行了精确的测定。结果表明,华北陆块东南缘不仅存在有前寒武纪岩浆活动,还广泛发育有中生代岩浆岩。根据所获年龄资料,笔者首次将区内中生代岩浆活动划分为燕山早、晚2期5个阶段,初步构建出该区晚中生代岩浆作用年代格架。Granites and related dikes in the Bengbu area have been dated precisely by using the ^40Ar-^39Ar technique. The results indicate that there occurred Precambrian magmatism but also Mesozoic magmatism southeastern margin of the North China Block in the daring on the Bengbu area. According to the age data available, the Mesozoic magmatism in the area is divided into the early Yanshanian and late Yanshanian phases and five stages A chronological framework of Late Mesozoic magmatism has been preliminarily established.

关 键 词：晚中生代 花岗岩类 40Ar-39Ar同位素年龄 蚌埠 

分 类 号：P588.121[天文地球—岩石学] P597.3[天文地球—地质学]