坦桑尼亚维多利亚湖东部绿岩带金矿床地质特征及成因浅析

坦桑尼亚维多利亚湖绿岩带是世界上非常有名的金成矿区，目前已发现数个世界级的金矿床。本文分析了该地区典型金矿床成矿地质特征，认为维多利亚湖东部绿岩带金矿床类型为构造蚀变岩型，矿体赋存在受EW向、NW向和NE向三组剪切破碎带控制的构造蚀变岩中，矿石类型主要为黄铁绢英蚀变岩和含金石英脉，与成矿有关的蚀变主要为硅化、绢云母化和黄铁矿化。同时，将这些矿床与中国胶东绿岩带的“焦家式”金矿床进行了对比，探讨了成矿模型研究所面临的问题。

Geological characteristics and metallogeny of gold deposits in the East Victoria greenstone belt of Tanzania

The Victoria greenstone belt in Tanzania is a well-known gold metallogenetic zone, which hosts several world-class gold deposits. This paper analyzes the geological characteristics and metallogeny for the typical gold deposits in this area, and suggests that they are of the structural altered-rock type. The ore bodies occur in structural altered-rock controlled by EW, NW and NE trending shear zones. The dominant ores are altered beresite and gold-bearing quartz veins; and the main alterations related to gold mineralization are silication, sericitization and pyritization. In addition, this paper compares them with the Jiaojia-type gold deposit in the greenstone zone of eastern Shandong, China, and discusses the problems in the research of mineralization models.