东天山中酸性侵入岩浆作用及其地球动力学意义

东天山地区华里西中一晚期中酸性侵入岩浆活动强烈，加里东期、华里西早期及印支期花岗岩类分布零星，初步可分为南、北两个岛弧花岗岩带。除哈尔里克有少量碱性花岗岩外，花岗岩类均属钙碱性岩石系列。从早期到晚期，中性性侵入岩浆作用经历了板块碰撞前、火山弧、碰撞同期、板内伸展、陆内叠覆造山和非造山6个演化阶段，岩石成因类型可分为M、CM、C、A4种类型。南、北岛弧的碰撞与缝合从北东向南西呈现出递进演化的特点。土屋－赤湖、石英滩、维权、白山等铜、钼、金矿床与华里西中期岛弧环境产出的过铝质钙碱性系列CM型花岗岩类关系密切。

The intermediate-acid intrusive magmatism and its geodynamic significance in Eastern Tianshan region

The intrusive magmatism of the mid later Hercynian granitoids is very strong in the Eastern Tianshan region, where the distribution of the Caledonian, the earlier Hercynian and the Indo China granitoids are rare relatively The granitoids in the Eastern Tianshan region are divided into two belts including Kangurtag Harlik island arc granite belt ( the northern belt ) and Aqishan Yamansu island arc belt (the southern belt ) Except the Harlik Mountain having several alkaline granite plutons, the granitoids in the Eastern Tianshan region belong to the calc alkaline series From the Caledonian period to the Indo China period, the intrusive magmatism had undergone the six evolutional stages: pre plate collision, volcanic arc, syn collision, extension within plate, orogenesis within continent and anorogenesis The genetic types of the Eastern Tianshan granitoids can be divided into M, CM, C and A types The collision and the closing of the Southern island arc and the Northern island arc present progressive evolution from the northeast to the southwest The copper, molybdenum and gold ore deposits such as Tuwu, Yandong, Chihu, Shiyingtan, Weiquan, Baishan et al are bound up with the CM type of the aluminium supersaturated calc alkaline granitoids