河南省嵩县南部是东秦岭地区重要的碱性岩浆活动产地之一，自西向东分布着狼凹沟、磨沟、龙头、焦沟及乌桑沟等5个规模较大的正长岩岩体及一系列正长岩岩脉。拟通过系统的野外地质、岩石学、元素地球化学及同位素年代学及锆石Hf同位素等研究工作，构筑嵩县南部正长岩岩石成因模型，为河南省东秦岭地区构造演化提供新的深部动力学过程约束，对其稀有金属、稀土元素成矿潜力进行评价。

South Songxian area, Henan Province, is one of important occurrences of alkaline magmatic products in eastern Qinling orogen belt. There are five bigger size syenite bodies in this area, i.e., Lang’aogou, Mogou, Longtou, Jiaogou and Wusanggou bodies from west to east, as well as plenty of syenite dykes. According to research works of field gelogy, petrology, elements geochemistry, Hf isotope and zircon U-Pb dating, the petrogenesis model of syenite in sount Songxian area will be established, which is used to provide new dynamic restriction for tectonic evolution of eastern Qinling orogen belt, and estimate the mineralization potential of rare metal elements and rare earth elements in south Songxian County.