内蒙古扎鲁特旗巨日合侏罗纪石英闪长岩的岩相岩性岩石化学特征

Lithology,Petrography and Petrochemistry for the Jurassic Quartz Diorite in Jurh,Jarud,Inner Mongolia

根据燕山地区侏罗纪—石英闪长岩的同位素年代学和化学成分资料及该地区构造变形序列,确定侏罗世-早白垩世早期是大兴安岭南段构造-岩浆作用鼎盛期,根据花岗质侵入岩的矿物组成、结构构造、接触关系、及前人的成果,可以将区内的花岗质岩划分成几类,通过双山子石英闪长岩岩相、岩性特征及微量元素,可以得出双山子石英闪长岩是燕山早期底侵作用的产物。

The study of petrochemistry and isotopic geochronology for quartz diorite and tectonic deformation indicates that the south Da Hinggan Ling during Middle Jurassic-Early Cretaceous was characterized by strong magmatism.The quartz diorite intrusion was emplaced in the early Yenshanian epoch on the basis of lithology,petrography and minor elements.