内蒙古哈布楚日铅锌银矿床地质特征及成矿机制

Geological Characteristics and Metallogenic Mechanism of Pb-Zn-Ag Deposit in Habuchuri,Inner Mongolia

详细分析了内蒙古哈布楚日银矿床地质特征及成矿机制。结果表明:①该矿床为小型斑岩—矽卡岩—热液型中低温铅锌银矿床;②矿体形成受构造影响显著,维纳河地区NE向构造带及NW、NE向脆性断裂为主要控矿构造;③矿床成矿时期为燕山期,燕山期中酸性小岩体是区内主要热源及物质来源,它们在有利的构造部位多次侵入,与围岩红水泉组的长石砂岩、粉砂岩、钙质粉砂岩的“硅钙面”发生交代作用,富集成矿;④区内地球化学异常对矿体有良好的指示性,其中黄铁矿化、硅化、矽卡岩化与成矿关系密切。研究成果对于该区进一步扩大找矿远景具有一定的借鉴意义。

Geological characteristics and metallogenic mechanism of Habuchuri Pb-Zn-Ag deposit are analyzed.The study results show that:①Habuchuri deposit is a small porphyry-skarn-hydrothermal medium-low temperature Pb-Zn-Ag deposit in Inner Mongolia;②the formation of ore-bodies are significantly affected by the structures,and the main ore-controlling structures are mainly for the NNE structural belt and the NW and NE brittle faults in the Weiner River area;③the mineralization period of the deposit is Yanshanian,Yanshanian intermediate-acid small rocks are the main source of heat and materials in the area,they intruded into the favorable structural parts for many times and metasomatism occurred with the "silica-calcium surface" of arkose,siltstone and calcareous siltstone in hongshuiquan formation of the surrounding rock and enriched the ore;④the geochemical anomalies in the area are good indicators of ore-bodies,pyritization,silicification and skarnization are closely related to mineralization.The above research results can provide reliable reference to further expand the prospecting prospect in this area.