Geochemical Characteristics and Tectonic Setting of A Zhalu Granite in Ailaoshan Structure Magmatic Belt,Western Yunnan Province

A Zhalu granite is located in the Ailaoshan structure magmatic belt.The granite is studied in the aspects of its geochemical characteristics and tectonic setting.The study shows that its distribution is obviously controlled by faults and the rock is characterized by shallow intrusion.Locally,the rock body is found with visible schist and mylonite of synantexis metamorphosed in the later period..The A/NCK of A Zhalu granite is mostly more than1,belonging to aluminum saturation.The granite has the characteristics of rich Si and K,low Ca,and poor Fe,Mg and Ti,indicating that it belongs to the high K Ca alkaline series.The geochemical analysis of major elements,trace elements,and rare elements show that the rock was formed in the arc continent collision stage of late stage orogenic collision.