滇中大红山河口铜矿床成矿规律及找矿前景  

Metallogenic Regularity and Prospecting Potential of Dahekou Copper Deposit in Dahongshan Mining Area,Central Yunnan Province

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

机构地区：[1]玉溪大红山矿业有限公司,云南省玉溪市653405 [2]中国有色金属工业昆明勘察设计研究院有限公司

出　　处：《现代矿业》2020年第4期15-18,共4页Modern Mining

摘　　要：河口铜矿床位于康滇地轴南段,挟持于红河断裂及水塘—曼蚌—沅江断裂之间,地质构造复杂,基性火成岩发育,成矿条件优越.在综合前人研究成果的基础上,对河口铜矿的成矿地质背景、矿床地质特征及矿化规律进行了剖析,结果表明:①铜矿体主要赋存于曼岗河组绿片岩(Pt1 dm1)和肥味河组大理岩段(Pt1 df3)内,发育浸染状、星点状及细脉状等沉积—热液改造型矿石构造;②矿床严格受控于岩相古地理、地层控制,含矿层自下而上发育变钠质熔岩→碳酸盐岩→凝灰岩的火山喷发—沉积韵律旋回,沉积物质随着演化逐渐增多,矿化增强;③矿床北段发育火山沉积—改造型矿化,矿体层位稳定、连续性好、规模大,南段以变质热液—改造型矿化为主,矿体形态复杂、富矿集中.在上述分析的基础上,综合分析认为细丫口以南、矿区北段地层、构造出露地段及盐巴箐一带成矿潜力较好,是矿区下一步开展找矿勘探工作的有利部位.Hekou Copper Deposit is located in southern margin of Kangdian axis,and clamped between Honghe fault and Shuitang-Manbeng-Yuangjiang fault,which characterized by complicated geological structure,magma development and superior metallogenic condition.The regional geological background,geological characteristics of the mine and mineralization law are analyzed,combined with some related geological prospecting results of the mining area.The results show that:①the ore-bodies are mainly occurred in the green schist in Mangganghe Formation(Pt 1dm 1)and the marble in Feiweihe Formation(Pt 1df 3),and the typical sedimentary-hydrothermal reformation type ore structures are developed,which including disseminated structure,vein structure and poikilitic structure;②the deposit are strictly controlled by the lithofacies paleogeography,formation,strata,and the ore-bearing strata is usually developed the volcanic eruption-sedimentary rhythm as follows:sodium-variant lava→carbonate→volcanic tuff from up to down in the deposit,with the increasing of deposited material and enrichment of mineralization;③the northern section of deposit has developed the volcanic-sedimentary mineralization,characterized by stable ore-bearing,favorite continuity and large scale.Besides,the southern section has developed the metamorphic hydrothermal-reform mineralizaiton,characterized by complicated morphology of ore-bodies and centralized rich ores.Based on the above analysis results,it is further indicated that the southern Xiyakou area,the occurrence of strata and tectonic in northern section mining area and Tabaqing area can be regard as the favorable further prospecting sections.

关 键 词：铜矿 区域地质背景 地质特征 成矿规律 找矿前景 

分 类 号：P618.41[天文地球—矿床学]