山东莱州望儿山金矿床地质特征及找矿标志分析

Geological characteristics and prospecting criteria of Wangershan gold deposit,Laizhou,Shandong Province

望儿山金矿床位于胶东地区之招平成矿带,成矿潜力巨大。研究结果表明:望儿山金矿床严格受控于望儿山—河东断裂带及次级断裂,矿体主要富集在断裂带下盘以及北东向、北北东向断裂体系中;矿区岩浆活动强烈,煌斑岩脉与金矿化分布密切相关;从矿体中心至外侧具有“矿化体→蚀变型矿体→下断裂面→碎裂岩型矿体→上断裂面→钾长石化带→钾长石化花岗岩”的变化规律;矿化蚀变带延深大、走向延伸较为稳定,在望儿山深部以及外围找矿潜力巨大。

Wangershan gold deposit is located in Zhaoping metallogenic belt of Jiaodong area,with great metallogenic potential.The results show that the Wangershan gold deposit is strictly controlled by the Wangershan Hedong fault zone and its secondary faults.The ore bodies are mainly concentrated in the footwall of the fault zone and the NE and NNE fault systems.The magmatic activity of the mining area is strong,and the lamprophyre vein is closely related to the distribution of gold mineralization.From the center to the outside of the ore body,there are"mineralized body→altered ore body→lower fault plane→cataclastic ore body"The change rule of"body→upper fault plane→K-feldspar zone→K-feldspar granite";the mineralization alteration zone has a large extension depth and a relatively stable strike extension,and has a great prospecting potential in the deep and peripheral Wangershan.