地质学报2013，Vol.87Issue(7)：957-966,10.
诸广花岗岩体南部油洞断裂带辉绿岩脉的Ar-Ar年龄及其地球化学特征
The Ar-Ar Age and Geochemical Characteristics of Diabase Dykes of the Youdong Fault Zone in South of Zhuguang Granite Pluton
摘要
Abstract
The Ar-Ar age of diabase dykes in the Youdong fault zone is 110.6±2.0 Ma,indicating that diabase dykes were emplaced in late Yanshaninan.Diabase is rich in SiO2 (mean value 50.65％),Al2O3 (mean value 15.10％),CaO(mean value 10.48％),MgO(mean value 7.80％) and poor in TiO2 (mean value 1.13％),FeOt(mean value 9.90％),Na2O(mean value 2.28％),K2O (mean value 0.90％),and P2O5 (mean value 0.11％.In rare earth elements,it is rich in large-ion lithophile Rb,Th,Ba,K,and poor in Nb,Ta,Zr,Hf,P and Ti.Total rare earth is low,and bear the right-wing-type distribution patten eith obviously Eu deplation(δEu mean value 0.92).Its characteristic is similar with that of active continental margin basalt,and this phenomenon reflects that primitive magma came from relative enrichment of the lithospheric mantle,didn't come from original mantle.关键词
辉绿岩/地球化学/富集地幔源区/诸广岩体南部Key words
diabase/ geochemical/ diagenetic environment / south of Zhuguang pluton引用本文复制引用
曹豪杰,黄国龙,许丽丽,黄乐真,王小冬,吴建勇,王春双..诸广花岗岩体南部油洞断裂带辉绿岩脉的Ar-Ar年龄及其地球化学特征[J].地质学报,2013,87(7):957-966,10.基金项目
本文为中国核工业地质局基础地质项目(编号200853)、中国地质调查局地质调查工作项目(编号121011220781)子项目的资助成果. （编号200853）
