中国覆盖区类型及覆盖区找矿技术方法现状与发展趋势
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1.安徽省勘查技术院;2.中国地质调查局发展研究中心;3.安徽省地质调查院(安徽省地质科学研究所)

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本文为自然资源部2024年度新一轮找矿突破战略行动科技支撑项目(ZKKJ202421)、安徽省重点地勘基金项目(2005-30)、安徽省国土资源科技项目(2014-K-08)、安徽省公益性地质调查项目(2010-34、2015-2-9)共同资助的成果。


Current status and development trends of coverage area types and exploration techniques in China
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1.Geological Exploration Technology Institute of Anhui Province;2.Development Research Center,China Geological Survey,China Geological Survey Development Research Center;3.Geological Survey of Anhui Province (Anhui Institute of Geological Sciences)

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    摘要:

    覆盖区是新一轮找矿突破的重要勘查区域。覆盖层具有屏蔽物化探异常的作用,存在勘查选区、找矿靶区圈定和深部矿体定位等难题。基于矿产勘查理论,通过查阅文献并结合覆盖区找矿经验,本文分析了覆盖层的物性特征和找矿的难点,并结合案例系统梳理总结了物化探技术方法在覆盖区找矿应用中的现状和发展趋势,以期为新一轮找矿突破战略行动提供参考。研究表明,覆盖区找矿难度不仅与覆盖层的厚度有关,还与覆盖层的物性特征和水文地质条件密切相关。据此,首次将覆盖区划分为八种类型:低阻薄层覆盖区、低阻厚层覆盖区、富水低阻厚层覆盖区、低阻超厚层覆盖区、戈壁荒漠覆盖区、火山岩覆盖区、推覆构造覆盖区和复合型覆盖区。其中,低阻厚层覆盖区、富水低阻厚层覆盖区、低阻超厚层覆盖区的找矿难度较大。研究显示,我国在薄层覆盖区广泛试验和应用了物化探技术,找矿效果显著,在厚覆盖区找矿也积累了一定经验,初步构建了多个不同覆盖区不同矿种的勘查技术体系,但找矿靶区圈定和深部矿体探测定位难题仍未解决。展望未来,穿透厚覆盖层的精准探测技术研究将是重点发展方向,地球物理电磁法及激发电场/磁场探测技术等将快速发展;地质信息采集方式空、地、井平台多元化和综合信息处理与成矿预测人工智能化将成为必然趋势;地质与物探融合研究覆盖区控矿构造与成矿模式将发挥越来越重要的作用。

    Abstract:

    The covered area is an important exploration region for the new round of mineral discovery breakthroughs. The cover layer acts as a barrier to geophysical anomalies, presenting challenges in delineating exploration selection areas, defining mineral target zones, and locating deep mineral bodies. Based on mineral exploration theory, this paper analyzes the physical characteristics of the cover layer and the difficulties in mineral exploration by reviewing literature and combining it with practical experiences in covered areas. It systematically summarizes the current status and development trends of geophysical and geochemical exploration techniques in mineral discovery applications within covered areas, aiming to provide references for strategic actions in the new round of mineral discovery breakthroughs. The research indicates that the difficulty of mineral exploration in covered areas is not only related to the thickness of the cover layer but also closely linked to the physical characteristics of the cover layer and hydrogeological conditions. Accordingly, the covered area is classified into eight types: low-resistivity thin cover area, low-resistivity thick cover area, water-rich low-resistivity thick cover area, low-resistivity ultra-thick cover area, desert cover area, volcanic rock cover area, thrust fault cover area, and composite cover area. Among these, the low-resistivity thick cover area, water-rich low-resistivity thick cover area, and low-resistivity ultra-thick cover area present greater challenges for mineral exploration. The study shows that China has widely tested and applied geophysical and geochemical exploration techniques in thin cover areas, achieving significant results, and has also accumulated some experience in mineral exploration in thick cover areas, initially establishing various exploration technical systems for different mineral types in different covered areas. However, the challenges of delineating mineral target zones and detecting deep mineral bodies remain unresolved. Looking ahead, research on precise detection technologies that penetrate thick cover layers will be a key development direction, with geophysical electromagnetic methods and stimulated electric/magnetic field detection technologies expected to advance rapidly. The diversification of geological information collection methods across air, ground, and well platforms, along with the integration of comprehensive information processing and artificial intelligence in mineral prediction, will become an inevitable trend. The integration of geological and geophysical research on controlling mineral structures and mineralization models in covered areas will play an increasingly important role.

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  • 收稿日期:2024-09-22
  • 最后修改日期:2024-11-04
  • 录用日期:2024-11-30
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