Research on the Relationship between Fault and Gold Mineralization in the Middle-south Section of Zhaoping Fault Zone in Jiaodong Peninsula

Zhaoping fault is an important ore-controlling structure of Jiaodong gold deposit. The middle-south section is a hot spot for prospecting in recent years. Based on the systematic analysis of the metallogenic characteristics and fault structure characteristics of gold deposits in the middle-south section of Zhaoping fault, this paper preliminarily discusses the relationship between fault structure and gold mineralization. Altered rock type gold deposits mainly occur in the quartz-sericite alteration zone of the footwall of the main fault, and the gentle dip of the fault is the favorable part of mineralization. Quartz vein type gold deposits mostly occur in secondary faults as vein groups. The occurrence state of gold in altered rock type gold deposits is from shallow to deep, the proportion of fissure gold and crystal fissure gold decreases, and the proportion of inclusion gold increases. The main fault develops quartz-sericite, silicification and potassic alteration from the center to both sides, and the mineralization alteration of the footwall is obviously stronger than that of the hanging wall. Geochemical profiles show that Au is positively correlated with Ag, Pb and Bi, and is obviously controlled by faults.