超声波纳米提取测量法——一种覆盖区找矿新技术:在拜仁达坝铅锌矿区的实践

覆盖区的隐伏矿为今后重要的勘查目标，常用的勘查方法有气体提取测量法和化学分散提取法。这些方法，野外工作量大；室内提取过程复杂，操作复杂、不环保，宜受外界影响大；测量结果重现性较差；为此，建立了土壤纳米简便提取和测量的新方法--超声波纳米提取测量法，利用超声波空化原理，快速提取土壤中的纳米物质，并在内蒙古半干旱草原区上方开展了超声波纳米提取测量法的地球化学勘查方法的试验工作。结果表明，超声波纳米提取测量法获得的地球化学异常明显，对下伏矿体的指示效果较为明确，其中主要成矿元素Cu、Pb、Zn、Ni、Ag在矿体上方均有明显的异常，且异常衬度与矿体的深度对应关系好。矿体深度浅，异常衬度大，矿体深度深，异常衬度小。超声波纳米提取法可作为该景观区寻找隐伏矿的有效手段。

A new method of ultrasonic nanoparticles extraction for geochemical exploration on semi-arid grasslands of Inner Mongolia

Concealed ore deposits in covered areas are important targets in the future prospecting work. Common exploration methods include gas extraction and chemical dispersion extraction. These methods have a large amount of work in field; the indoor extraction process is complicated, the operation is complex, and it is not environmentally friendly. Besides, the results are often influenced by external influences, and the reproducibility of measurement results is poor. Based on ultrasonic technology, this work established a new method for simple extraction of nanoparticles in soil, and conducted test work on semi-arid grasslands of Inner Mongolia by using this new method. The results show that this new ultrasonic nanoparticles extraction method can obtain high geochemical anomalous value and can also indicate concealed deposits effectively. There are obvious geochemical anomalies of such main ore-forming elements as Cu, Pb, Zn, Ni and Ag over the ore-body and the contrast of abnormity has good relation to the deep orebodies. The contrast of abnormity of shallow ore-body is larger than that of deep ore-body. It is known that ultrasonic nanoparticles extraction can be used to search for concealed deposits on semi-arid grassland-covered region.