莫桑比克Kazuzu地区金矿地质特征及找矿方向初探

莫桑比克楠普拉省Kazuzu地区为上利哥尼亚(Alto Ligonha)伟晶岩金矿带重要金矿富集区之一,金矿体主要赋存于中元古界玛玛拉岩组和莫罗奎岩组的变质岩中,矿石类型为石英脉型、钾长石—石英脉型、石英网脉型,区内金矿体基本平行或小角度斜切片麻理,主成矿期为泛非期。本文在区域地质背景研究、矿体地质特征、控矿因素和找矿标志分析的基础上,结合区内地球物理特征和室内综合研究,认为高阻—高极化异常区JD-1异常区和JD-3异常区为本区下步找矿重点区域,找矿潜力很大。本文旨在对Kazuzu地区金矿床地质特征和成矿规律研究,实现金矿床找矿突破,以期为国内矿业企事业单位赴莫桑比克开展矿业投资和开发提供依据。

Geological characteristics and prospecting direction of gold deposit in the Kazuzu Area, Mozambique

The Kazuzu area, located in Nampula Province, Mozambique, is one of the most important gold-concentrated area in the pegmatite gold belt of Alto Ligonha. Gold ore bodies are hosted in the Mamara, Morokui gneiss rocks of the Mesoproterozoic, the major ore types are quartz-vein type, potassium feldspar quartz-vein type, and quartz reticulated-vein type. The gneissosity structure of gold ore bodies are development, which are exist by basically parallel to or oblique cut. Besides gold ore bodies are mainly formed at Pan-African period. Based on the study of regional geological setting, geological features of ore body, ore-controlling factors and prospecting criteria, combined with regional geophysical characteristics and comprehensive research, it is proposed that there is great prospecting potential in the area. This paper aims to study the geological characteristics and metallogenic regularity of gold deposits in Kazuzu area, so as to achieve a breakthrough in prospecting for gold deposits and provide potential cooperation opportunities for domestic mining enterprises to carry out mining investment and development in Mozambique.