南天山东段乌什塔拉矿区地球化学特征及地质意义

East section of south tianshan Wu Shen tara mining area geochemical characteristics and geological significance

乌什塔拉地区位于南天山造山带东段,从时代上来说,南天山造山带应归类为晚古生代造山带。它位于西伯利亚板块与塔里木板块之间,晚古生代时,这两个板块之间的洋盆逐步开始闭合,并最终导致碰撞造山形成了南天山造山带。在这样的构造环境下,发育了大量的晚石炭世-早二叠世的花岗质岩体。乌什塔拉地区花岗岩属于高钾钙碱性准铝质镁质花岗岩,归类为Ⅰ型花岗岩,它是壳幔混合作用的产物,形成于碰撞-后碰撞的造山背景下。

WuShen tara region is located in the east section of south tianshan orogenic belt, in time, the south tianshan orogenic belt should be classified as a late Paleozoic orogenic belt. It is between Siberia plate and tarim plate, the late Paleozoic, the marginal ocean basin between the two plates gradually began to close, and eventually lead to collision orogeny formed the south tianshan orogenic belt. In such environment in the construction of the development of a large amount of late carboniferous - early Permian granitic rock mass. WuShen tara region belongs to high potassium calc alkali granite aluminum magnesium granite, classified as type I granite, it is the product of crust-mantle mixing action, formed in the collision - after collision orogenic background.