武山铜矿深部找矿新发现及成因  

New Discoveries of Deep Prospecting in Wushan Copper Deposit and Its Genesis

作　　者：李明骏[1] Li Mingjun(Wushan Copper Mine,Jiangxi Copper Co.,Ltd.,Jiujiang 332204,China)

机构地区：[1]江西铜业股份有限公司武山铜矿

出　　处：《金属矿山》2019年第12期135-144,共10页Metal Mine

摘　　要：武山铜矿位于长江中下游铁铜成矿带西段-九瑞矿集区中部,成矿地质条件优越。近年来,随着地质研究程度及勘查深度的不断加深,发现其深部地质成矿条件较浅部有了重大变化,在进一步总结矿床地质特征和成矿条件的基础上,着重对成矿物质来源、成矿运移通道及围岩条件进行了研究,以深部找矿新发现的地质现象为支撑,多维度分析和探讨了矿床成因及成矿模式。研究表明:①在五通组与黄龙组之间的假整合面上未能见到原始沉积的矿坯层,排除了海西期海底喷流或同生沉积的可能;②北矿带的层控块状硫化物型矿床及南矿带矽卡岩型矿床,在成因上均属略晚于花岗闪长斑岩体同期生成的热液型铜矿床;③NW与NE向的基底断裂控制了成矿岩体的活动和定位,岩浆上侵携带了大量的成矿物质来源,接触带及层间破碎带构造为成矿提供了重要的运移通道和成矿的富集空间,化学性质活泼的碳酸盐岩类地层为成矿热液交代提供了良好的外部环境,这三者在空间上的特殊配置和时间上的耦合为成矿提供了有利条件;④根据地层产状向深部预测,志留系下伏的奥陶系碳酸盐岩类地层将在深部与岩体相交,今后应注意在其接触带部位探索存在矽卡岩型铜矿体的可能。Wushan Copper Mine is located in the western part of the iron-copper metallogenic belt in the middle and lower reaches of the Yangtze River-central of Jiurui Mining Area,which has excellent ore-forming geological conditions.In recent years,with the deepening of the degree of geological study and exploration degree,it has been found that the deep geological metallogenic conditions has changed significantly from the shallow part.On the basis of further summarizing the geological characteristics and metallogenic conditions of the deposit,this paper supported by the newly discovered geological phenomena in deep prospecting,focuses on the study of metallogenic material sources,metallogenic migration channels and surrounding rock conditions,and analyzes the genesis and metallogenic model of the deposit in various aspects.The study results show that:①because the original deposited billet is not seen on the disconformity surface between the Wutong Formation and Huanglong Formation,it is impossible to find the submarine eruption or syndepositional structure in the Hercynian;②the stratigraphic massive sulphide deposits in the northern ore belt and the skarn deposits in the southern ore belt are relatively late in the formation of hydrothermal copper deposits in the same period as the granodiorite porphyry;③the NW trending and NE-trending basement rift controlled the movement and orientation of the metallogenic rock mass,the upthrust magma provides a large source of metallogenic material,the structure of contact zone and interlayer fracture zone provides important migration channels and metallogenic enrichment space for mineralization,the carbonate rocks with active chemical properties provide a good external environment for metasomasis of hydrothermal ore-forming solution,these three aspects to metallogenic provide strong conditions in space and time;④it is concluded that according to the inferred attitude of dip that the carbonate strata of the Ordovician which located below the Silurian will intersect with the ro

关 键 词：武山铜矿 矿床成因 找矿新发现 成矿物质来源 热液型矿床 深部找矿 

分 类 号：P611[天文地球—矿床学] P612[天文地球—地质学]