太行山南段中生代侵入体微量元素地球化学及岩浆源区性质探讨  

Minor Element Geochemistry of Mesozoic MagmaticIntrusions of Southern Taihang Mountains

作　　者：宋新宇[1] 冯钟燕[2] 

机构地区：[1]中国科学院自然资源综合考察委员会,北京100101 [2]北京大学地质学系,北京100871

出　　处：《华北地质矿产杂志》1999年第1期1-17,共17页

摘　　要：本文对太行山南段中生代侵入岩体微量元素地球化学进行了系统研究， 成果表明各类侵入岩的稀土配分模式均呈轻稀土富重稀土亏损， 且没有铕异常。认为这是由于岩石中副矿物中的负铕异常与主要矿物长石类矿物中高的正铕异常抵消的结果。本文还探讨了岩浆源区的特点， 认为本区岩石多具幔壳混合来源 （ Ｍ Ｃ 型）， 部份来自幔源 （ Ｍ Ｃ 型）This pater deals with the geochemical features and origin of Mesozoic magmatic intrusions of the southern Taihang Mountains.Our research demonstrates that many kinds of Mesozoic magmatic rocks have the same chondrite-normalized rare earth element distribution pattern,i e ,rich in LREE and deficit in HREE,and no europium anomaly We consider it is resulted from the compensation of high concentration of europium in feldspar minerals and low concentration of europium in accessary minerals,such as magnetite,sphene,and apatite Minor element geochemistry,togather with other geological character,illustrate that magma mostly came from the mantle-crust mixing origin and partly from mantle \;

关 键 词：中生代 侵入体 太行山 侵入岩 元素地球化学 

分 类 号：P588.12[天文地球—岩石学] P595[天文地球—地质学]