海南儋州文溪坡钨多金属矿段裂隙构造与钨富集成矿关系

发布时间：2018-03-23 03:26

  本文选题：裂隙岩相学　切入点：钨矿　出处：《矿物学报》2017年05期 　论文类型：期刊论文

【摘要】：通过裂隙统计和测量,分析裂隙充填物等裂隙岩相学特征,探讨裂隙构造与钨富集成矿关系。研究认为,本区裂隙分为4期,裂隙倾角(中轴夹角)分别为9°、29°、47°、69°。白钨矿主要赋存在层间裂隙中,其细脉倾角在45°左右,与地层构造变形面理大致相同,部分白钨矿细脉赋存在穿层裂隙组中,细脉倾角在60°左右。白钨矿富矿体和裂隙储矿空间受黑云母闪长岩侵入岩体控制较为明显,在黑云母闪长岩侵入岩体附近,碎裂岩化相较为强烈,平均裂隙密度达到35条/m,局部裂隙密度最高可达110条/m,白钨矿富集在黑云母闪长岩体的外接触带;裂隙充填物类型包括高温到低温矿物,其特征表明裂隙充填物具有多期次形成的特征;白钨矿富集成矿主要与电气石化和硅化密切相关,推测白钨矿富集成矿主要受黑云母闪长岩有关的岩浆热液成矿作用和裂隙密度大小耦合关系控制,本矿区新发现的钨矿具有较好找矿前景。
[Abstract]:By means of fracture statistics and measurement, this paper analyzes the lithofacies characteristics of fissures such as fissures filling, discusses the relationship between fracture structure and tungsten enrichment and metallogenesis, and concludes that the fractures in this area are divided into four stages. The fracture dip angle (the angle between the central axis and the middle axis) is 9 掳/ 29 掳/ 47 掳/ 69 掳respectively. Scheelite mainly occurs in the interlayer fissure, and its vein-dip angle is about 45 掳, which is approximately the same as that of the tectonic deformation surface, and some of the scheelite veins occur in the fracture group of the interlayer. The vein-dip angle is about 60 掳. The ore-storage space of scheelite rich ore body and fissure is obviously controlled by biotite diorite intrusive rock mass, and in the vicinity of biotite diorite intrusive rock mass, the cataclastic lithofacies is relatively strong. The average density of fractures is 35 / m, and the highest density of local fractures is 110 / m. Scheelite is concentrated in the outer contact zone of biotite diorite, and the types of fissure filling include high temperature to low temperature minerals. Its characteristics indicate that the fissure filling has the characteristics of multi-stage formation, and the enrichment and mineralization of scheelite are mainly related to tourmalization and silicification. It is inferred that the enrichment and mineralization of scheelite are mainly controlled by magmatic hydrothermal mineralization related to biotite diorite and coupling relationship of fracture density and density. The newly discovered tungsten deposits in this mining area have a good prospecting prospect.
【作者单位】： 中国地质大学;有色金属矿产地质调查中心;海南茂高矿业有限公司;
【基金】：海南茂高矿业有限公司找矿科研专项基金(批准号:MGY201601)
【分类号】：P618.2
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本文编号：1651694