土壤地球化学测量在川西南纳尔地区找金效果研究

    Effectiveness of soil geochemical survey for gold prospecting in the Na'er area, south of the Western Sichuan Plateau

    • 摘要: 研究区位于川西高原南部,属半湿润高寒山地浅覆盖区,地表基岩露头稀少,水系发育极差。在该类特殊景观区,土壤地球化学测量方法对隐伏有色金属矿产的勘查具有显著优势。本次研究采用1∶1万土壤地球化学测量,系统划分出Au-As-Sb、Pb-Zn及Bi-Sn 3类特征元素组合;通过异常查证,在研究区内圈定出1处具找矿潜力的综合异常区;结合元素地球化学特征、组合规律及区域成矿背景,进一步明确了找矿有利靶区。经钻探验证,共揭露隐伏金矿化体5条,取得显著找矿突破,充分证明该方法在川西高原浅覆盖区金矿勘查中具有重要应用价值。

       

      Abstract: The study area, a semi-humid alpine mountainous area, is located in the south of the Western Sichuan Plateau. It is characterized by shallow overburden, sparse bedrock outcrops on the surface, and undeveloped drainage systems. Under such a unique landscape, the soil geochemical survey demonstrates significant advantages for the exploration of concealed non-ferrous metal minerals. This study, through 1∶10,000 soil geochemical surveys, systematically identified three element assemblages: gold-arsenic-antimony (Au-As-Sb), lead-zinc (Pb-Zn), and bismuth-tin (Bi-Sn). Through follow-up geochemical surveys, it delineated a composite anomaly zone with high prospecting potential within the study area. A prospecting target was further identified in combination with the geochemical characteristics of elements, element assemblage patterns, and regional metallogenic background. This study revealed a total of five concealed gold orebodies, which were verified by drilling engineering, marking a significant breakthrough in mineral exploration. This fully demonstrates the application potential of this method for gold exploration in shallow overburden areas within the Western Sichuan Plateau.

       

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