摘要
郭家岭花岗闪长岩是胶东金矿区的重要岩体，Rb－Sr全岩等时线年龄为200．6Ma［1］。岩体中常见一种闪长质包体，这些包体具有淬火结构、变余斑状结构及索列特扩散分带，表明它们是由来自地幔的高温玄武质岩浆快速冷凝结晶形成的。包体中存在由辉石→角闪石→黑云母→石英完整的交代系列，反映了包体岩浆受到壳源长英质主岩岩浆不同程度的交代改造。包体的常量元素、微量元素及稀土元素也支持壳幔岩浆相互作用的成因解释。
In the Guojialing granite of the Jiaodong gold ore field there often occur dioritic en-cIaves. They show blastoporphyritic texture,Soret diffusion band and quenched texture,indicativeof their forming from quickly undercooling of high-temperature basaltic magma from the mantlewedge. Moreover,among the minerals in the enclaves there are also developed a series of metaso-matic reactions: pyroxene→biotite→guartz, which reveals that the enclave magma subjects to theinteraction with a felsic magma derived from the crust. Information on major,trace and rare-earthelements all supports this genetic interpretation.
出处
《矿物学报》
CAS
CSCD
北大核心
1997年第3期302-309,共8页
Acta Mineralogica Sinica
基金
国家教委博士点基金
!9528434
