大红山铜矿床伴生金银矿化富集规律及找矿方向研究  

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

作　　者：金鑫 余璨 Jin Xin;Yu Can(Yuxi Mining Co.,Ltd.;Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co.,Ltd.)

机构地区：[1]玉溪矿业有限公司,云南省玉溪市653100 [2]中国有色金属工业昆明勘察设计研究院有限公司,云南省昆明市650051

出　　处：《现代矿业》2020年第6期30-34,共5页Modern Mining

摘　　要：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。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.

关 键 词：金银矿化 地质特征 矿化规律 找矿方向 

分 类 号：P61[天文地球—矿床学]