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新疆阿吾拉勒山一带大哈拉军山组火山岩是陆缘弧构造环境.通过研究,测区火山岩具高K、高Al和低碱、低Ti的特点;微量元素地球化学组成与典型火山(岛)弧环境玄武岩的地球化学组成一致;稀土总量97.89×10-6~222.87×10-6,平均含量为140.71×10-6,具轻稀土亏损,重稀土富集特点;各种构造环境判别图解表明,大哈拉军山组火山岩位于靠大陆边缘的岛弧区.大哈拉军山组火山岩记录了西天山阿吾拉勒地区在早石炭世处于板块俯冲碰撞环境的重要信息.
The volcanic rocks of the Dahalajushan Formation in the Ularale area, Xinjiang are continental marginal arc tectonic setting. The volcanic rocks in the survey area are characterized by high K, high Al, low alkali and low Ti. The trace element geochemical composition is similar to the typical volcano Island) arc environment of the same basalt geochemical composition; total rare earths 97.89 × 10-6 ~ 222.87 × 10-6, the average content of 140.71 × 10-6, with light rare earth loss, heavy rare earth enrichment characteristics; various tectonic settings Discriminant diagrams show that the Dahalajunshan Formation volcanic rocks are located in the island arc area near the continental margin, and the Dahalajunshan Formation volcanic rocks record important information about the Pre-Carboniferous subduction collision environment in the Awulal area of the Western Tianshan Mountains.