内蒙古中部地区绿岩及绿岩型金矿成矿地质特征

内蒙古中部大青山、色尔腾山地区发现的绿岩型金矿 ,经数年的勘查评价、研究 ,近两年被逐步认识和肯定。其成矿地质条件独特 ,矿化体赋存于新太古界色尔腾山群柳树沟组的特定层位。矿化与变质变形作用有关 ,变形强 (包括糜棱岩化 ) ,矿化好。地表品位一般较低 ,多在 1g/t左右 ,向深部增高。矿体规模大 ,适于大规模堆浸。化探异常主要集中在绿岩分布区 ,激电异常与矿化层吻合较好 ,矿 (化 )点多 ,找矿标志较为明显 ,资源潜力巨大 ,运用综合方法找矿效果较好。

The Geological Characteristics of Greenstone and Greenstone-type Gold Deposit in Central Inner Mongolia

The greenstone-type gold deposit, which was discovered in the area of Daqing Mountain and Sheerteng Mountain in central Inner Mongolia, has been identified and confirmed gradually in the last two years. The geological conditions of this type of gold deposit are unique, and the ore bodies are hold within the special layer in Liushugou Formation of Sheertenshan Group, Archean. Mineralization is related to metamorphism and deformation(include mylonitization), Where is the stronger deformation, where is the richer mineralization. The gold grade in ground is general low and usually is 1g/t, and the grade in deep is generally increased. The size of the ore body is large, and the ore are suitable to heapor dump leaching in large scale. The geochemical anomalies are mainly located in the area of distribution of the greenstone and IP anomalies are coincided with ore body. Prospecting indications are evidence. Potential mineral resources is large. Prospecting is successful by synthetical method.