玲珑花岗岩的形成机理

PETROGENETIC MECHANISM OF LINGLONG GRANITES

片麻状花岗岩、中粗粒花岗岩和斑状花岗岩是玲珑花岗岩体的主要岩石类型。一系列的研究表明:玲珑花岗岩体的三种主岩石经历了不同的成岩作用,片麻状花岗岩是混合-交代作用形成的,中粗粒花岗岩是由片麻状花岗岩通过部分熔融作用形成的,两者具有密切的成因联系和继承发展关系,斑状花岗岩是岩浆上升后经分界结晶作用形成的。

Lingling granite massig,wildly distributed in Jiaodong Peninsula,is heterogebcous in composition. It consists of three major rock types, namely, medium-coarse grained granite, porphyritic granite, gneissic granite. The gneissic granite was formed through migmatization and granitiztion, wheras the medium-coarse grained granite through partial melting. The prophyritic granite is different from the above two types. It was formed yhrough differential crystallization.