【摘要】 本文根据天山东段尾亚地区麻粒岩的主要造岩矿物斜方辉石、单斜辉石、黑云母、石榴子石和斜长石的电子探针分析结果，重点研究了尾亚麻粒岩各主要造岩矿物的化学成分特点，并且讨论其对变质作用温度压力条件的指示意义。矿物化学的研究结果表明，变质作用峰期达到了中压麻粒岩亚相。更多还原

【Abstract】 The Proterozoic metamorphic rocks are widely spread in the Weiya region. The granulites take the form of lensoid bodies which are scattered within the dominant gneisses. All the minerals studied in this paper are separated from these granulites.Fifteen main minerals, including five orthopyroxenes, two clinopyroxenes, four biotites, two garnets and two plagioclases from the granulites, were analyzed using electron microprobe. A detailed mineral chemical study was made. The compositional characteristics of these main minerals show that they are products of granulite-facies metamorphism.更多还原