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    安徽霍山石英岩玉矿床地质特征与地球物理找矿方法研究

    Geological features of the Huoshan quartzite jade ore deposit in Anhui Province and study of geophysical prospecting methods

    • 摘要: 安徽霍山石英岩玉主要呈脉状产于大别岩群英云闪长质片麻岩和燕山期二长花岗岩接触带附近的脆性断裂构造中,由于产出规模小,矿体连续性差,在野外地质勘查中利用电法直接寻找石英岩玉脉具有较大困难。通过勘查石英岩玉脉赋存的硅化构造破碎带,间接了解石英岩玉脉的空间分布,可使电法勘探发挥最大效果。文章分析霍山石英岩玉的矿床地质特征、矿体分布规律及其与围岩的电性差异,结合物探测试成果,认为利用电法勘探查明低阻硅化构造破碎带寻找高阻石英岩玉脉是一种较可行的地球物理找矿方法。

       

      Abstract: Quartzite jade ore deposit in Huoshan city of Anhui province occurs as veins often in the silicified fractured zones in the contact zone between tonalitic gneiss of Dabie rock Group and Yanshanian monzonitic granite. Due to its small scale, poor ore continuality and complex topography of the study area, it is difficult to trace the veins of quartzite jade by electrical prospecting method. However, spatial distribution of the quartzite jade veins can be indirectly obtained through investigating the silicified fracture zones which host the ore bodies. Therefore, electrical prospecting methods can perform its biggest effect. By analyzing geological characteristic of the ore deposit, distribution pattern of ore bodies, electrical differences between quartzite jade veins and surrounding rocks, and geophysical testing result, it can be concluded that electronic prospecting technique is very practical in locating high resistance quartzite veins in the fracture zones with low electrical resistance.

       

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