【作者】 王国富；

【导师】 孙振家；

【作者基本信息】 中南大学 ， 矿产普查与勘探， 2006， 博士

【摘要】 以板块理论为指导，论文对双王金矿床产出的构造背景、矿床地质地球化学特征、矿床成因、角砾岩形成机制进行了研究，建立了矿床的矿液致裂构造定位模式，并结合成矿模式及地质、地球物理、地球化学找矿标志对已知矿体的深边部及外围进行了成矿预测研究。取得的主要成果如下： 1、通过对角砾岩带宏观特征的分析，提出了双王含金角砾岩带是雏形断层的新认识，是造山期后褶皱回返过程中，近东西向剪切作用下的应力集中于钠长岩的产物。 2、详细观察和描述了角砾岩特征，提出了矿床严格受矿液致裂作用控制的认识，矿液致裂作用不仅促进了雏形断层微裂隙的发育，还带来了成矿物质，雏形断层的持续扩展反过来又推动矿液致裂的发生，矿液致裂作用的多次叠加，形成透镜状的含金角砾岩矿体。 3、从金、黄铁矿和石英的晶体结构、电子结构和晶体表面特征分析出发，认为金在黄铁矿和石英中的富集主要与其晶体结构、电子结构和表面特征有关，并应用稳定配合物的18电子规则探讨了双王金矿床中黄铁矿和石英含金机理。提出了雏形断层、矿液致裂作用促使金在黄铁矿等矿物中富集成矿的新认识，即雏形断层、矿液致裂作用使黄铁矿和含铁白云石、石英等矿物中生成大量微裂隙，使矿物在晶出过程中产生更多的矿物表面缺陷，从而使金与之接触的面积增大，沉淀的时间更长，空间更大，最终形成富矿体。 4、从剖析王家楞次级盆地特征出发，提出了盆地沉积时的水下洼地制约钠长岩的分布、规模和钠质含量，并决定着角砾岩体的分布、规模及含矿性，依此并根据区域构造体制转换形式，建立了双王金矿成矿演化模式和构造定位新模式。 5、详细研究西坝岩体、地层、矿石等物质成分、同位素和稀土元素特征及成矿构造，论证了西坝岩体主要为成矿提供了巨大热源而不具备提供金等成矿物质的条件，提出了岩体的两期侵入活动分别驱使岩体周围的钠质-硅质热液和碳酸盐质热液向雏形断层运移、发生矿液致裂的认识，晚期岩体的侵入进一步诱使深源CO₂沿雏形断层上升，最终导致晚期方解石脉的大量形成。 6、双王金矿床的地质、地球化学特征和成矿构造演化表明，成矿物质具有多来源的特点，金主要来自钠长岩及板岩，硫主要来自地更多还原

【Abstract】 Guided by plate tectonic theory and combined with the analysis of the metallogenetic geotectonic setting, geological and geochemistry characteristics, genesis and brecciation mechanism in Shuangwang gold deposits in China,this paper established location model of ore-fluidic fracture.According to the metallogenetic model and the signs of geology, geophysics, geochemistry,this paper prognosed some hidden ore bodies in the sides,deep and periphery around the known ore-bodies. The main research findings and original views achieved in this paper are as follows:1 .Through the study on the macroscopical characterisics of breccia belt in Shuangwang gold deposit, this paper has put forward a new view that the breccia belt is a incipient fault, i.e. concentration of stress in albitite by approximately transmeridional shearing during epiorogenic fold inversion.2.0n the basis of observing and describing of the characteristics of breccia, the author has pointed out a view that ore-fluidic fracturing drived the growth of micro-cranny of incipient fault by positive feedback, brought mineralizing matter and controled the forming of gold deposit by multiple ore-fluidic fracture.3.According to the characteristics of crystal structure,electronic structure and surface structure of gold,pyrite and quartz,this paper has disserted gold in pyrite and quartz(silicon-dioxide) primarily connects with their crystal structure, electronic structure and surface structure.The 18-electron regulation about the assorting material were used to interpret the mechanism of gold bearing pyrite and quartz. The growth of incipient fault and ore-fluidic fracturing promoted gold enrichment in pyrite and quartz were point out,i.e. micro-cranny in pyrite,ankerite and quartz formed by incipient fault and ore-fluidic fracturing conduced to plenty of defect in mineral surface during crystal growth,enlarged the area of gold contacting with mineral surface, prolonged and extended the deposition of gold,lastly,posed rich gold ore-bodies.4.Starting with analyse the characteristics of Wangjialeng sedimentary sub-basin,the auther has acquired the view that the更多还原