TECHNIQUE METHOD OF MINERAL RESOURCES SURVEY AND DRILLING VERIFICATION IN COVERED AREAS
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摘要:
覆盖区矿产勘查是新一轮找矿突破战略行动的重要内容之一. 采用更加绿色和有效的钻探技术, 快速获取隐伏基岩信息与样品, 是覆盖区找矿亟待总结和推广的工作. 本研究基于绿色勘查理念, 采用便携式浅层钻探装备与技术, 以及空气反循环钻进工艺, 在大兴安岭东南缘宝山浅覆盖区铜多金属矿勘查中开展钻探试验, 实现了快速穿透覆盖层获取隐伏基岩信息、查证物探异常并采集地球化学样品的效果, 同步结合孔内成像等技术, 为填制覆盖区隐伏岩石地层单元分布范围和界线等提供了基础资料. 试验结果表明, 基于浅层绿色钻探技术, 结合孔内成像, 并为野外地球化学快速分析提供测试样品的多方法组合, 可以有效解决浅覆盖区找矿难题, 在矿产勘查过程中具有很好的推广价值.
Abstract:Mineral resources exploration in covered area is an important component of the new round of prospecting breakthrough strategy. It is urgent to summarize and popularize prospecting in covered areas to quickly obtain the information and samples of buried bedrocks through more green and effective drilling technology. Based on the concept of green exploration, this study uses portable shallow drilling equipment and air reverse circulation drilling technique to carry out drilling tests in the exploration of copper polymetallic deposits in the shallow covered area of Baoshan, southeast margin of Daxinganling Mountains, realizing the effect of quickly penetrating the cover layer to obtain the information of hidden bedrocks, verifying geophysical anomalies and collecting geochemical samples. The in-hole imaging technique is simultaneously combined to provide the basic data for distribution range and boundary of the buried lithostratigraphic units in covered areas. The test results show that the multi-method combination based on shallow green drilling technology and in-hole imaging, which provide test samples for rapid field geochemical analysis, can effectively solve the prospecting problem in shallow covered areas, with good promotion value in the process of mineral exploration.
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Key words:
- covered area /
- mineral survey /
- shallow drilling /
- buried bedrock /
- green exploration
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