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本文通过对银硐子特大型银多金属矿床中重晶石岩类的岩石学、矿物学、地球化学等特征研究和总结， 认为本区重晶石岩类是由热水流体同生沉积作用形成的。热水成岩成矿作用方式有两种， 重晶石单矿物岩成分纯度高， Ｂａ Ｓ Ｏ４ 的含量为 ７７２９％ ～９９３７％ ， 其他成分混入少， 以热水快速化学沉淀的方式同生沉积形成； 重晶石岩类及银多金属矿石中， Ｂａ Ｏ（５６９％ ～２９０６％ ）、 Ｓｉ Ｏ２、 Ａｌ２ Ｏ３、 Ｆｅ２ Ｏ３ 、 Ｆｅ Ｏ、 Ｎａ２ Ｏ、 Ｓ、 Ｃｕ、 Ｐｂ、 Ｚｎ、 Ａｇ 等含量高， 是不同成分、性状热水混合触发的层流体系失稳造成矿质大量骤沉， 热水混合同生沉积作用形成了重晶石岩类及银多金属矿层。
In this paper, we study and summarize the petrology, mineralogy and geochemistry characteristics of barite in the Yinyindu large silver-polymetallic deposit. It is concluded that the barite rocks in this area are formed by syngenetic deposition of hot water fluid Forming. There are two types of mineralization in hydrothermal diagenesis. The barite single mineral rock has high purity and BaS O4 content is 7729% ~ 9937%, while the other components are less mixed with the rapid chemical precipitation of hot water Ba0 (569% ~ 2906%), Si O2, Al 2 O 3, Fe 2 O 3, Fe O, Na 2 O, S, Cu and Pb in barite and silver polymetallic ores , Zn, Ag and so on. It is a result of the instability of the laminar flow system caused by the mixing of different compositions and properties of hot water, resulting in the massive sedimentation of minerals and the formation of barite and silver polymetallic ore deposits by syngenetic deposition of hot water.