汪清县六道崴子地区碱长花岗岩地质特征及构造背景分析

摘要

After researching, alkali feldspar granite that located in Liudaowaizi area of Wangqing County, is A type granite, which with miarolitic structure, potassium feldspar is microcline, plagioclase is albite (An=1), the mass fraction of SiO2, K2O, Na2O are high, which of CaO, MgO are low. The mass fraction of∑REE is 139.3,δEu is 0.14, its loss is obvious. That is alkali granite formed in extensional tectonic environment of non orogenic period.%分布在汪清县六道崴子地区的碱长花岗岩，研究后认为是A型花岗岩。其特征是具晶洞构造，钾长石是中正微长石，斜长石为钠长石（An=1），SiO2、K2O、Na2O质量分数较高，CaO、MgO质量分数较低。∑REE质量分数为139.3，δEu为0.14，亏损十分明显，是非造山期拉张构造环境形成的碱性花岗岩。