粤东北差干钼金多金属矿成矿特征及模式探讨  

Exploration of Metallogenic Characteristics and Metallogenic Models of Chagan Molybdenum Gold Polymetallic Deposit in Northeast Guangdong Province

作　　者：李炫 LI Xuan(Party 292,Geological Bureau for Nuclear Industry of Guangdong)

机构地区：[1]广东省核工业地质局二九二大队,广东省河源市517001

出　　处：《现代矿业》2024年第2期57-62,共6页Modern Mining

摘　　要：对差干钼金多金属矿床成矿地质条件、矿体特征、围岩蚀变特征等进行初步调查与统计,对矿区的控矿构造、岩浆及成矿作用等进行分析研究,探讨了矿区成矿物质来源、控矿因素、矿体赋存特征以及成矿模式。差干钼金多金属矿床矿体主要产于晚白垩世酸性火山岩地层中,尤其是晚白垩世气孔流纹岩、球粒流纹岩地层,矿石类型为钼金矿脉型,蚀变种类主要为硅化、钾(钠)长石化、胶状黄铁矿化、赤铁矿化、绿泥石化、萤石化和碳酸盐化等。矿区成矿物质主要来源于火山岩本身已有成矿物质以及火山喷气阶段深部岩浆源,矿体受北北东向鹿子坑断裂和北西西向2组不同级别、不同方向构造的联合控制,构造分支复合变异部位、侵入体接触界面、裂隙发育部位以及层间破碎带是矿化富集的有利部位,多期多阶段蚀变和成矿作用有利于形成厚大的钼金多金属矿体。Preliminary investigation and statistics were conducted on the geological conditions,ore body characteristics,and surrounding rock alteration characteristics of Chagan molybdenum gold polymetal-lic deposit.Analysis and research were conducted on the controlling structures,magmatism,and ore-form-ing processes of Chagan molybdenum gold polymetallic deposit.The sources of ore-forming materials,con-trolling factors,ore body occurrence characteristics,and ore-forming models were discussed.The ore bod-ies of Chagan molybdenum gold polymetallic deposit mainly occur in the Late Cretaceous acidic volcanic rock strata,especially in the Late Cretaceous stomatal rhyolite and spherical rhyolite strata.The ore type is molybdenum gold vein type,and the types of alteration are mainly silicification,potassium(sodium)feld-spar mineralization,colloidal pyrite mineralization,hematite mineralization,chloritization,fluoritization,and carbonation.The ore-forming materials in the mining area mainly come from the volcanic rocks them-selves,as well as the deep-seated magma sources during the volcanic eruption stage.The ore body is jointly controlled by the northeast oriented Luzikeng Fault and two sets of structures of different levels and direc-tions in the northwest direction.The favorable areas for mineralization enrichment are the composite varia-tion sites of structural branches,the contact interfaces of intrusive bodies,the development sites of frac-tures,and the interlayer fracture zones.Multi stage and multi-stage alteration and mineralization are condu-cive to the formation of thick molybdenum gold polymetallic ore bodies.

关 键 词：钼金多金属矿床 地质特征 找矿标志 成矿模式 

分 类 号：P618.2[天文地球—矿床学]