大兴安岭中南段银多金属矿床勘查进展与找矿思路

Progress of Exploration and Prospecting Thoughts for Silver Polymetallic Deposit at Southern-middle Parts of the Da Hinggan Mountains

中国银矿资源丰富,成矿条件优越,找矿潜力良好,尤其以大兴安岭地区为代表。其北段和中南段近年来发现多处大型—超大型银矿床,结合大兴安岭南段银矿勘探成果,根据成矿地质背景、主要控矿要素等条件,对赤峰地区主要银矿床类型进行划分总结,初步分为热液脉型、矽卡岩型、斑岩型、浅成低温热液型、喷流沉积型和构造蚀变岩型6大类型,并对赤峰地区银矿床的找矿发现过程进行阐述,最终对该地区的银多金属矿床的找矿思路进行了总结,对下一步找矿具有重要启示。

It is known that silver ore resources are rich in China, and metallogenic condition is superior with good prospecting potential,particularly for the Da Hinggan Mountains.For example,in recent years, several large and super-large silver deposits were found at the northern and southern-middle parts of the Da Hinggan Mountains.In the present study, based on the results of silver ore prospecting at southern part of the Da Hinggan Mountains and its ore-forming geological background, main ore-controlling elements, etc, the types of silver deposits in Chifeng region were summarized and sectioned.Overall, the study region can be sectioned into six types, namely, thermal fluid vein type,porphyry type,epithermal type,exhalitive-sedimentary type,structre altered rock type.In addition,the exploration process of silver deposits was elaborated,finally,the prospecting thoughts for silver polymetallic deposit was summarized, which has important significance for future prospecting.