坦桑尼亚索罗瓦金矿地质特征及找矿远景

索罗瓦金矿位于坦桑尼亚维多利亚湖南部卡哈马绿岩带东北缘,成矿条件优越。矿体主要赋存在条带状磁铁石英岩中,矿体形态、产状受磁铁石英岩及其与云母石英片岩的层间剪切带控制,金矿化与条带状硅铁建造中的硅化和硫化物矿化关系密切,为典型的条带状硅铁建造型金矿。索罗瓦金矿作为近年来发现的BIF型金矿,目前针对其地质、地球物理等研究较少,该文较为详细地描述了索罗瓦金矿床地质特征,通过勘查工作圈定金矿体5条,结合高精度磁法测量和激电剖面测量成果,认为正负异常梯度带及低阻、高极化是寻找该区含金矿(化)条带状硅铁建造的地球物理前提条件,亦是本区下一步找矿的重点方向。

Geological characteristics and prospecting prospects of gold deposit in the Solwa, Tanzania

Solwa gold deposit is located in the northeast margin of Kahama greenstone belt with favorable ore-forming conditions. Ore body mainly occurs in the BIF. Solwa gold deposit is a typical BIF type deposit. The shape and occurrence of the ore body are controlled by the BIF and the interbedded shear zone between BIF and mica quartz schist. The gold mineralization is closely related to the silicification and sulfide mineralization in BIF. Solwa gold deposit, as a BIF type gold deposit discovered in recent years, is seldom studied on geology and geophysics. Totally 5 gold orebodies are delineated by boreholes. According to the results of high precision magnetic measurement and IPC profile measurement, it is considered that the positive and negative anomalous gradient zone, low resistivity and high polarization are the geophysical prerequisites for the formation of gold bearing (mineralized) in this area and the key direction for the next prospecting.