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本文通过勘探变量的统计得分法以及聚类和特征分析法,将矿体变化性按成因分为四类.按不同的取样观测方法,将矿体变化性分为群体的、单体的和局部的三类,并以实例说明上述分类在矿体预测和勘探中的实际应用. 相似文献
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个旧锡矿大马芦层间氧化矿床地质特征及找矿方向研究 总被引:1,自引:1,他引:1
个旧锡矿层间氧化矿床品位高、工业利用价值大,加强这类矿床地质特征的研究,对于矿山深部及外围的锡矿找矿具有重要的指导意义。通过对个旧锡矿层间氧化矿床产出的地质特征、控矿因素的分析与研究,探讨了其矿床成因,并总结出:“背-突式”、“向-断-凹式”、“断-互式”及“断裂式”四种成,矿模式。按这些模式的找矿实践表明,找矿效果极佳。 相似文献
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个旧老厂锡多金属矿田陡石阶测区断裂构造地球化学异常特征 总被引:1,自引:0,他引:1
为对研究区内可能存在的隐伏矿体进行定位预测,指导下一步找矿工作,采用构造地球化学的研究方法,对区内断裂构造地球化学异常特征进行了详细的分析研究。结果表明,本区断裂构造中,主要成矿元素Cu、Pb、Zn、Ag、Sn、Mn的空间浓度分布趋势大致呈现西(北)高东(南)低之势;元素组合异常明显,呈NE向带状展布;主要成矿元素及与成矿相关元素的异常表现出10个浓集中心。这些特点的总结和运用,对指导矿山生产和进一步找矿都具有现实意义。 相似文献
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锡氢化物是锡的重要迁移形式 总被引:6,自引:1,他引:6
论述了锡氢物的形成条件和物理学特征。在岩浆和热液中,锡以锡氢化物,锡合金氢化物迁移至地壳浅部,锡氢化物,锡合金氢化物被氧化成锡氧化物,锡合金矿物,或与硫,硫化氢作用形成锡的硫化矿物。 相似文献
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Abstract: The skarns and genesis were studied of the Huanggang Fe‐Sn deposit and the nearby Sumugou Zn‐Pb deposit in Inner Mongolia, China. In the Huanggang mine, Nos. 1 to 4 Fe ore bodies are arranged along a calcareous horizon from proximal to distal in this order to a granite intrusion named Luotuochangliang, while Sn ore body is situated near another granite intrusion named 204. According to the distance from the granitic intrusions, mineral assemblages in skarns are systematically changed. Garnet is the most predominant skarn mineral throughout the deposit. Hastingsitic amphiboles, however, predominate in the proximal skarns. Fluorite is common in the proximal skarns, while instead calcite is common in the distal skarns. Chlorite is characteristically present only in No. 3 ore body, and chlorite geothermometry gives near 300C for the mineralization of later stage. When garnet crystal shows zonal structure, isotropic andraditic garnet occupies the core, and is surrounded with anisotropic less‐andraditic garnet. The presence of white skarn along the boundary between main skarns and host sedimentary rocks confirms relatively reducing environment prevailing as a whole in the studied area. However, the compositional relation between coexisting garnet and clinopyroxene demonstrates that relatively oxidizing condition was achieved for garnet skarn and magnetite ore in the distal, Nos. 2 to 4 Fe ore bodies and Sumugou deposit, compared to that for garnet skarn in the proximal, No. 1 and Sn ore bodies. Preliminary study on the tin content of garnets in the studied area revealed a certain degree of contribution brought from granitic intrusives since the early stage of skarn formation, irrespective of proximal or distal. Oxygen isotope study on garnet, magnetite, quartz and skarn calcite, as well as hydrogen isotope study on hastingsitic amphibole, demonstrates mainly meteoric water origin for the skarn– and ore‐forming solutions. The occurrence of Sn, W, Mo and F minerals indicates that those elements were mainly supplied to the deposit later than the formation of skarns and iron ores, overlapping to them. These constraints allow to delineate the formation model of the deposit as follows (Fig. 10): At the time of late Jurassic to early Cretaceous, felsic activity occurred in this region as a part of Yanshanian magmatism, and formed granitic intrusions as well as thick volcanic piles on the surface. The circulation of meteoric water was provoked by the heat brought by the intrusions. By this circulation, much amount of iron was extracted from andesites of the Dashizhai Formation, and precipitated as skarns and magnetite ores along calcareous horizons near the bottom of the Huanggangliang Formation. Subsequently, volatile‐rich fluids with Sn, W and Mo were expelled from the solidifying granitic magmas, and precipitated these metals in the pre‐existing skarns and ores. 相似文献
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重熔斑岩型锡多金属矿床具有明显的蚀变、矿化分带性,由含矿岩体向外(或从深部到地表)蚀变分带依次为:碱性长石化带→黑鳞云母云英岩化带→黄玉云英岩化带→绢英岩化带→硅化带→似青盘岩化带;矿化分带为:钨(锡、钼、铜)→锡(钼、铋、锌)→钼(锡、铅、锌)→铅、锌(银、锡)。前两个矿化带与黄玉云英岩化带关系十分密切,钼矿化带与绢英岩化带和硅化带有关,铅—锌矿化带主要产于硅化带与似青盘岩化带叠加部位。 相似文献
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在0.002%溴化十四烷基三甲铵(TTMAB)-20%HCI体系中,Sn有一灵敏的吸附波,峰电位在-0.47V(vs.Ag/AgCl),线性范围2~1000ng/ml。体系可用于岩石、土壤样品中微量Sn测定;机理研究表明,溴化一四烷基三甲铵通过诱导吸附SnCl提高测定的灵敏度。 相似文献