大红山铜矿床伴生金银矿化富集规律及找矿方向研究

大红山铜矿床属火山喷气—搬运沉积—变质改造型矿床，矿化丰富，成因复杂。在系统收集矿区地质资料的基础上，结合野外调查工作、试验测试成果，对大红山铜矿区内的金、银矿化赋存状态和富集机制进行了研究。结果表明：①黄铜矿、黄铁矿等矿物中的独立金、银矿物是矿床中伴生金、银的主要产出形式；②曼岗河时期海底火山喷气—沉积作用奠定了金、银矿化基本格架，金、银矿化主要赋矿层位为曼岗河组第3岩性段；③I号矿带各矿段金、银矿化显示出与铜、铁矿化显著的正相关关系，其中I2、Ib、I3矿段中矿化强度最高；④金、银矿化层控特征显著，矿床演化过程严格受火山活动及岩相古地理控制，地层岩性、围岩蚀变、地球物理特征等共同组成了寻找大红山金、银矿化的有利标志。

Mineralization Enrichment Regularity and Ore Prospecting of Associated Gold silver for Dahongshan Iron copper Deposit

Dahongshan Copper Deposit is a volcanic exhalation transport and deposition metamorphic reformation type deposit,which characterized by rich mineralization and complicated genesis.Based on systematic collection of geological data of Dahongshan mining area,the occurrence and enrichment mechanism of gold silver mineralization is obtained by combined with the field geological surveying and test results.The study results show that:①the independent gold silver mineral are mainly occurred in chalcopyrite and pyrite;②the submarine volcanic exhalation sedimentation establish foundation for gold silver mineralizaiton,in addition,the fold silver mineralization is mainly occurred in third lithologic member of Manganghe Formation;③the significant positive correlation between the gold silver mineralization and copper iron mineralization is presented,which have most mineralization internsity among I2,Ib and I3 ore section;④the gold silver mineralization has the characteristic of stratabound,and the ore evolution strictly controlled by volcanic activity and lithogacies paleogeography,the formation lithology,wall rock alteration,geophysical characteristics can be regarded as the prospecting criteria for Dahongshan gold silver mineralization.