东坡矿田铅锌矿床控矿构造研究

【作者】 邓飞跃；

【导师】 黄满湘；

【作者基本信息】 中南大学 ， 矿产普查与勘探， 2007， 硕士

【摘要】 东坡矿田位于华南褶皱系与扬子准地台间的过渡地带，系指分布于千里山花岗岩体接触带及其附近碳酸盐岩层的特定部位的一系列矿产地的总称。铅锌矿床则产于岩体的内外接触带部位。本论文在分析、研究前人工作成果的基础上，总结经验，发现问题。经过深入细致的野外地质调查，收集大量的地质信息，采集大量的岩石、矿石样品和标本，运用现代岩石学、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，同时结合计算机处理数据、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、岩浆岩及其与成矿的关系。应用地质力学的观点从宏观上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；分析了各种控矿构造因素，提出了新的控矿模式。通过研究认为，构造是东坡矿田成矿的重要因素。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转移，二是为成矿提供赋存空间，三是为矿液运移提供导矿通道。构造运动往往伴随有岩浆活动，含矿流体在构造动力和岩浆热力的驱动下产生活化转移。构造运动产生的断裂和褶皱则为成矿提供导矿通道和赋矿空间。通过编制大量的平面图和剖面图，发现了铅锌矿体的分布规律，对东坡矿田铅锌矿床的深部和边部进行了找矿预测。更多还原

【Abstract】 Dongpo ore field locates at the transitional zone of South China drape series and Yangzi quasi terra platform, and it’s a floorboard about a series of ore producing area which distribute around Qianlishan granite rock body and special place of carbonate treeme which is close to Qianlishan granite rock body. Those zinc-lead deposits occur in the inside and outside contact belt of rock body.Based on the predecessors’ work, the writer summarizes their experience and discovers some questions. The author do geological investigation very carefully, and glean a great amount of geological information and rock and ore samples. Applying modern petrology、deposit theory、geochemistry、mineralogy、isotope geology and metallogenetic prognosis theory and method, combining other subjects such as processing datum and simulating maps with computer, the author also analyzes the relationship among the ore-forming and stratum、structure、magmatic rock on the base of studies on ore-forming geological background. Applying the views of geomechanics, the author analyzes the evolution and changes of ore district structure in macro and micro sides. Through studying the geological features of ore deposit, the author not only summarizes metallogenetic rule and establishes a new metallogenetic model, but also analyzes varies ore-controlling structures and bring forward a new ore-controlling model.From the systematic studies, the author has get following conclusions: structure is a very important factor of mineralization in this ore district. The relationship between structure and ore-forming can be shown in three faces: first, structure can drive ore elements to activate and to migrate; second, structure can create suitable ore-hosting sites; third, structure can afford routeways for ore elements circulation. Tectonic movement sometimes go with magma activity, and make fluid which include ore elements occur activation and transfer with the tectonic dynamic and magma heat. The folds and faults brought by tectonic movement provide routeways and ore-hosting sites for ore-forming.After drawing plentiful ichnographies and section planes, author discover the distributing rule of lead-zinc orebodies, and forecast ore-searching in deep and margine of lead-zinc deposits in Dongpo ore field.更多还原