文档介绍：中南大学硕士学位论文摘要摘要河台金矿床位于华南造山带粤西隆起区NE向的广宁一罗定断裂带东北部与NNE向的吴川一四会断裂带的交汇部位。矿床产于广宁一罗定断裂带的次一级构造河台韧性剪切带中。本论文在分析、研究前人工作成果的基础上,经过深入细致的野外地质调查,收集大量地质信息,采集大量岩石、矿石样品,应用现代岩石学、矿床学、地球化学、矿物学、同位素地质学及成矿预测学等理论和方法,并采用计算机处理数据、模拟制图等手段,从区域成矿地质背景研究入手,着重研究了地层、构造、岩浆岩、韧性剪切带及糜棱岩与成矿的关系。运用地质力学的观点从宏观和微观上分析了矿区构造的演化和变迁;通过对矿床地质特征的研究,总结了成矿规律,提出了新的成因模式;分析了各种构造控矿因素,提出了新的控矿模式。通过研究认为,构造是该矿区成矿的重要因素,构造与成矿的关系主要表现在三个方面:一是使成矿物质活化迁移,二是为成矿提供赋存空间,三是为导矿提供通道。韧性剪切带的形成为成矿提供了运移通道、富集动力、物质来源、容矿空间、物化环境等;同时,韧性剪切带控制着金矿床(点)的分布,糜棱岩带控制着金矿体的产出; F。断裂经历过多次活动,往深部产状变缓,是矿区重要的导矿构造。成矿不是在深层韧性剪切带中形成,而是上升为浅部地壳,糜棱岩带中迭加有脆性断裂,含金热液向上迁移并在脆性断裂中多次循环叠加,才能使Au元素大量富集,最终形成金矿床。在此基础上,提出了糜棱岩带赋存工业矿体的5条准则。关键词河台金矿,韧性剪切带,糜棱岩带,控矿构造,控矿模式中南大学硕七学位论文 AB譬限A(玎 ABSTRACT Hetai golddeposit islocated atthecrossing between the Guangdong upriR region,Huanan orogenic belt northeastern part ofNE—trending Guangning-Luoding fault zone between NNE-trending Wuchuang-Sihui golddeposit ishosted inHetaiductile shear zone,the secondary structure ofGuangning-Luoding fault zone. Based ontheprodecessor’S work,the author dogeological investigation carefully,and glean agreat amount ofgeological information and rock and modem petrology、deposit theory、geochemistry、 mineralogy、isotope geology andmetallogenefic prognosis theory and bining othersubjects,the author alsoanalyze therelationship among theOre—forming andstratum、structure、magmatic rock、ductile shear zone、mylonite by means puter datumand simulatemaps onthebase ofthe studies on ore·forming theViews of geomechanics,the dissertationanalysis theevolutionandchanges ofthe ore district structure inmacro and micro smdy协g thegeological features ofOredeposit,the author not only summarize ic rule and establish a new ic model。but also analyze varies Ore—controlling factorsandbring forward anew ore-controlling model. From thesystematic studies,the authorhasreached thefollowing conclusions:Structure isthemostimportant factorofgold mineralization in this ore