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新疆西北部阿拉套山南坡的花岗岩体的４０Ａｒ－３９Ａｒ和Ｋ－Ａｒ定年结果表明它们都是海西期侵入体。侵入活动可分为三个阶段：最早的是东部的岩基，岩性为花岗间长岩和钾长花岗岩，年龄约３０５Ｍａ，而后是西部的二长花岗岩和钾长花岗岩，与钨锡成矿有关，年龄约２９０Ｍａ；最晚的是最西部的二长花岗岩，年龄约２８０～２７０Ｍａ。岩浆活动中心有自东或北东向西或南西迁移的趋势。
The 40Ar-39Ar and K-Ar dating of the granites on the southern slope of the Alatau Mountain in northwestern Xinjiang indicates that they are all Hercynian intrusions. Intrusion can be divided into three stages: the earliest is the eastern rock base, the lithology of granitic gneiss and potassium feldspar granite, age ca. 305Ma, followed by the western monzonitic granite and potassium feldspar granite, and tungsten tin into The mine is about 290Ma in age. The later is the granite of the westernmost part of the country, with an age of about 280-270Ma. Magmatic centers have a tendency to migrate from east or north east to west or southwest.