【作者】 李顺庭；

【导师】 杜杨松； 王京彬；

【作者基本信息】 中国地质大学（北京） ， 矿床普查与勘探， 2011， 博士

【摘要】 湖南瑶岗仙钨矿田位于南岭成矿带中部,其内分布有瑶岗仙石英脉型黑钨矿矿床、和尚滩矽卡岩型白钨矿矿床和青山里铅锌矿床,它们与瑶岗仙复式岩体有密切的成因联系。本文对瑶岗仙复式岩体和相关的钨多金属矿床进行了详细研究,重点探讨了这些矿床的成因,取得了以下主要成果和认识。1、瑶岗仙复式岩体由早期中粗粒黑云母花岗岩、中期细粒斑状花岗岩和晚期石英斑岩组成,它们的SHRIMP锆石U-Pb年龄分别为155.4±2.2Ma(MSWD=0.53)、157.6±2.6Ma(MSWD=1.5)和158.4±2.1Ma(MSWD=1.17)。瑶岗仙石英脉型黑钨矿床与和尚滩矽卡岩型白钨矿床的辉钼矿Re-Os年龄分别为(158±1.2) Ma(n=7,MSWD=1.3)和(160±3.3) Ma(n=6,MSWD=2.7)。这些资料表明区内岩浆-成矿作用事件是连续的,代表了南岭地区在(155.4±2.2)～(160±3.3) Ma之间发生的第二次大规模成岩成矿事件。2、瑶岗仙复式岩体具有S型花岗岩的特征,且富含成矿元素,不仅是瑶岗仙钨多金属矿床的成矿母岩,而且是瑶岗仙钨多金属矿田成矿系统的中心。与钨成矿有关的主要是形成早期和中期侵入岩的岩浆,而形成晚期侵入岩的岩浆虽然较富W,但由于快速冷却结晶来不及充分分异,不能导致钨成矿。3、矿石硫同位素和铅同位素以及矿物包裹体成分和氢氧同位素分析资料表明,瑶岗仙黑钨矿床、和尚滩白钨矿床和青山里铅锌矿床的成矿物质来自瑶岗仙复式岩体,而从早到晚瑶岗仙黑钨矿床和青山里铅锌矿床的成矿热液逐渐由岩浆热液往岩浆水与天水混合热液过渡。4、根据矿床地质和地球化学特征,认为瑶岗仙黑钨矿床、和尚滩白钨矿床和青山里铅锌矿床在成因上都与瑶岗仙复式岩体岩浆-热液成矿系统密切相关,是该成矿系统在瑶岗仙复式岩体不同部位以及距岩体不同距离处发生不同类型金属矿化的产物。更多还原

【Abstract】 The Yaogangxian tungsten polymetallic ore-field is located in the central part of the Nanling metallogenic belt. In this ore field are distributed the Yaogangxian tungsten, Qingshanli lead-zinc and Heshangtan scheelite deposits and associated intrusion (Known as Yaogangxian intrusion).A detailed study on the Yaogangxian intrusion and Yaogangxian tungsten has been carried out, with focus on their origin and evolution process of the Yaogangxian intrusion and Yaogangxian tungsten.The following are major achievement obtained in this dissertation:1. The Yaogangxian complex intrusions are divided into three stages. The lithologies of the intrusions include medium-coarse-grained biotite granite formed in the first stage, fine grained granite in the second stage, and granite porphyry in the third stage. The zircon SHRIMP U-Pb isotopic ages are defined as 155.4±2.2Ma(MSWD=0.53)、157.6±2.6Ma(MSWD=1.5)、158.4±2.1Ma(MSWD=1.17) for the first, second and third stages of intrusions, respectively. The Yaogangxian tungsten and Heshangtan scheelite deposits are dated at (160±3.3) Ma (n=6, MSWD=2.7) and (158±1.2) Ma (n=7, MSWD=1.3), respectively, using molybdenite Re-Os isochron method. They are continuous geological event, and are important parts of the explosive regional event in Nanling area during (160±3.3)～(155.4±2.2) Ma.2. The Yaogangxian complex intrusions, showing the characteristics of S-type granite, being rich in ore-forming elements, is the parental rock, and also the centre of The Yaogangxian tungsten polymetallic ore-field. W mineralization is related with the first and second stages of intrusions. Compare with the first and second stages of intrusions, the third stage of intrusion have experienced weak fractional crystallization.3. The characteristics of sulfur isotope and Pb isotopic from ore, composition of mineral fluid inclusion and H、O isotope compositons inferred that ore-forming material of Yaogangxian tungsten, Qingshanli lead-zinc and Heshangtan scheelite deposits is from the Yaogangxian complex intrusions, and ore-forming fluids of Yaogangxian tungsten and Qingshanli lead-zinc deposit are transition type between magmatic water and magmatic water mixed with meteoric water from the early stage to the later stage.4. The Geological and Geochemical Characteristics indicate Yaogangxian tungsten, Qingshanli lead-zinc and Heshangtan scheelite deposits are closely related with Yaogangxian complex intrusions magmatic-hydrothermal system, are products of different types of ore mineralization at different locations of the intrusion resulted from the this magmatic-hydrothermal system.更多还原