香夼一带埃达克岩地球化学特征与构造环境

为了研究山东烟台香夼一带花岗岩地球化学特征，通过综合研究、野外调研、岩矿鉴定、主量元素、微量元素、稀土元素特征曲线示踪、构造环境判别图解研究，认为该区花岗岩符合埃达克岩富硅, 高铝, 低镁, 贫Y和Yb, Sr含量高, LREE富集, 无Eu异常(或有轻微的负Eu异常)的特征，对应的铜矿及金矿的找矿工作应围绕岩体展开。香夼岩石类型为花岗闪长斑岩；郭家店岩石类型为二长花岗岩、花岗闪长岩，蚀变带为绢英岩，矿化具有蚀变构造岩型金矿特征；龙回头岩石类型为斑状花岗闪长岩、二长花岗岩，矿化呈浸染状，与构造带相关性较弱。花岗岩为高钾钙碱性系列火山岛弧花岗岩。花岗岩岩浆类型以埃达克质岩浆为主。

Geochemical characteristics and tectonic environment discrimination of adakite in Xiangkuang area, Yantai, ShandongLu Wenji1,Cui Yufeng2, Kong Xiangchao3, Fu Shixing1, Lan Xinjie1, ZhangQikai1

In order to study the geochemical characteristics of granite in the Xiangkuang area of Yantai, Shandong Province, through comprehensive research, field investigation, rock and mineral identification, major element, trace element, rare earth element characteristic curve tracing, and tectonic environment discrimination graphical research, it is considered that the granite in this area is Adakite is rich in silicon, high in aluminum, low in magnesium, deficient in Y and Yb, high in Sr content, enriched in LREE, and has no Eu anomaly (or a slight negative Eu anomaly). Mine work should be carried out around the rock mass. The Xiangkuang rock type is granodiorite porphyry; the Guojiadian rock type is monzogranite and granodiorite, the alteration zone is sericite, and the mineralization has the characteristics of altered structural rock type gold deposits; Longhuitou The rock types are porphyritic granodiorite and monzogranite, and the mineralization is disseminated, and the correlation with the structural belt is weak. The granite is a high-potassium calc-alkaline series volcanic island arc granite. The magma type of granite is mainly adakitic magma.