坦桑尼亚尼亚卡贝尔金矿床成矿地质特征及找矿前景分析

Metallogenic geological characteristics and prospecting potential analysis of the Nyakabale gold deposit in Tanzania

通过对坦桑尼亚尼亚卡贝尔金矿区的成矿地质背景及矿体的主要地质特征的分析,大致了解了矿区金矿化体的主要地质特征和成矿因素。尼亚卡贝尔金矿区金矿化受北西向的韧性剪切带的控制,呈脉状或透镜状产于闪长岩体内,条带状含铁建造带的矿化程度低且仅局部矿化。矿石类型主要为蚀变岩型,黄铁矿化普遍发育,局部见硅化。矿石矿物为自然金。根据矿区的控矿构造、赋矿岩层、矿化蚀变强度等主要成矿地质特征分析,尼亚卡贝尔金矿区金矿化的程度较低,找矿前景一般。

Through the analysis of the metallogenic geological background and main geological characteristics of the ore bodies in the Nyakaber gold mining area in Tanzania,the main geological characteristics and metallogenic factors of the gold mineralization bodies in the mining area are roughly understood.The gold mineralization in the Nyakaber gold mining area is controlled by the northwest-trending ductile shear zone,and occurs in the diorite body in the form of veins or lenses.The mineralization degree of the banded iron formation zone is low and only partially mineralized.The ore type is mainly altered rock type,with widespread pyritization and local silicification.The ore minerals are natural gold.According to the analysis of the main metallogenic geological characteristics of the ore-controlling structures,ore-bearing rock layers,and mineralization and alteration intensity in the mining area,the degree of gold mineralization in the Nyakaber gold mining area is low,and the prospecting prospects are generally average.