坦桑尼亚金矿成矿特征与资源潜力分析

坦桑尼亚是东非第一产金大国,资源量达2 300t。坦桑尼亚金矿绝大多数金矿集中分布于维多利亚湖区,为与绿岩带相关的造山型金矿,其成矿明显受构造控制。根据矿体产出状态可分为剪切带石英脉型和含铁建造层控型。根据现有金矿的产出特征及控矿因素本文圈定了北马拉金资源远景区等12个金的资源远景区,并指出除维多利亚湖区外坦桑尼亚中部多多马地区马佐卡成矿远景区、坦桑尼亚东南部地区马干巴兹金矿资源远景区和坦桑尼亚元古代造山带西南部卢帕金矿资源远景区具有与维多利亚湖区的金矿资源远景区相似或相近的绿岩带成矿环境,具有较好的金矿成矿前景。

Metallogenic characteristics and resource potential analysis of Tanzania gold deposits

Abstract: Tanzania is the largest gold producing country in East Africa, endowed with a gold reserve of ca. 2300 tons. The majority of gold deposits in Tanzania are concentrated in the Lake Vitoria Region, they are orogenic gold deposits related to greenstone belts, and are tectonically controlled. Gold deposits are divided into quartz vein type in the shearing belt and ferruginous formation related type according to their occurrences. According to the occurrence characteristics and ore controlling factors of gold deposits in Tanzania, the author has delineated 12 gold resources prospective areas such as North Mara prospect in the paper, and further proposed that the Mazoka prospect in Dodoma region in Central Tanzania, Magambazi gold prospect in southeastern Tanzania and Lupa gold prospect in Proterozoic orogenic belts in southwestern Tanzania have similar metallogenic environments with goldfields in the Lake Victoria Region, comprising of promising gold-bearing areas.