Geochemical characteristics and tectonic environment discrimination of adakite in Xiangkuang area

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.