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微细浸染型金矿赋矿岩石以钙质粉砂岩为主。许多矿区既有产于沉积岩中的浸染型矿化又有产于断裂中的脉型矿化 ,按照岩浆热液成矿体系 ,在微细浸染型金矿产出地区要注意近岩浆源的斑岩型、夕卡岩型等金矿化。成矿深度可达 2～ 4km。Au主要呈纳米级微细粒或单原子状态自由金 (Au0 ) ,也有的呈晶格金或结构金 (AuⅠ)存在于含As黄铁矿或毒砂中 ,但在一个沉积岩地区的金矿不一定全是浸染型金矿 ,金的粒度也可更大。深部岩浆、变质 (含Au)流体在构造 岩浆活动中向上运移与不同岩性和 (或 )流体反应 ,在浅部有利构造部位沉淀成矿的成矿模式被越来越多的人接受。勘查工作要围绕以 (高角度 )断裂与深部连通的有利岩性寻找浸染型矿化 ,同时要十分注意脆性地层中直接受断裂控制的脉型金矿化
Fine disseminated gold ore deposits mainly calcareous siltstone. Many mines not only have disseminated mineralization occurring in sedimentary rocks but also vein-type mineralization occurring in the fault. According to the magmatic hydrothermal metallogenic system, attention should be paid to the porphyry near the magma source in the areas of finely disseminated gold deposits Type, skarn-type gold mineralization. Metallogenic depth up to 2 ~ 4km. Au is mainly in the form of nano-sized fine particles or monatomic free gold (Au0), and some is present in asparagus or arsenopyrite but also in a sedimentary rock area Certainly all disseminated gold, gold particle size can be greater. The deep magmatic and metamorphic (Au) -containing fluids migrate upward along the tectonic magmatic activity and react with different lithologies and / or fluids, and the metallogenic model of sedimentary mineralization in favorable structural parts in the shallow part is accepted by more and more people. Exploration efforts should seek disseminated mineralization around the favorable lithology at (high angle) faults and deep connectivity, with great attention paid to the vein-type gold mineralization directly controlled by faults in the brittle strata