东昆仑塔格地区变质基性火山岩地球化学及演化特征

Geochemistry and Evolution Characteristics of Metamorphic Basic Volcanic Rocks in the Tage Area,East Kunlun

通过进行1:5万区调等相关工作,在青海格尔木市塔格地区发现一套主要由变质基性火山岩组成的绿片岩类,本文对其进行了岩石地球化学特征研究。其特征表明该火山岩为拉斑玄武岩系列;稀土元素特征表明近似于洋岛碱性玄武岩;变质演化总体有变形强,但变质程度低的特征。

A set of greenschist mainly composed of metamorphic basic volcanic rocks was discovered in the tagg area of geermu city,qinghai province through 1:50000 district adjustment and other related work.The characteristics show that the volcanic rocks are tholeiite series.The characteristics of rare earth elements are similar to ocean island alkaline basalt.The metamorphism evolution is characterized by strong deformation but low metamorphism.