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首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >Electromagnetic Induction Methods in Mining Geophysics from 2008 to 2012
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Electromagnetic Induction Methods in Mining Geophysics from 2008 to 2012

机译：2008年至2012年采矿地球物理学中的电磁感应方法

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In the period from 2008 to 2012, the topic of electromagnetic (EM) induction methods applied to mineral exploration has been the subject of more than 50 papers in journals and more than 300 extended abstracts presented at conferences (about 100 of which contain developments worthy of mentioning). Most of the work at the universities has been on modelling, inversion and data processing, and most of this material is published in the refereed literature. However, academia has also undertaken work on system geometry changes, system calibration and sensor design. There have been papers describing new systems developed for mineral exploration and case histories describing the use of EM methods to directly discover mineral deposits or to map the geology. Most of this work is by the service companies and mining companies and reported in the unrefereed literature. Since 2008, the pace of development of helicopter time-domain systems has slowed and more effort has been directed to developing natural source magnetic systems and to modelling and inverting this data. A number of studies comparing the results from natural source methods with the results from artificial source methods conclude that the natural source methods can see large-scale geological structures usually when there is a weak conductivity contrast with the surrounding material, but the natural source methods are unable to see small features that have a very large conductivity contrast with the country rock. Hence, they are not a good detector of mineral deposits unless one is looking for a large porphyry system.
机译：在2008年至2012年期间，应用于矿物勘探的电磁（EM）感应方法的主题已成为期刊上发表50多篇论文和在会议上发表300多篇扩展摘要的主题（其中约100篇包含了值得提及）。这些大学的大部分工作都在建模，反演和数据处理方面，并且大部分材料在参考文献中发表。但是，学术界还进行了系统几何形状更改，系统校准和传感器设计方面的工作。已经有论文描述了为矿产勘探开发的新系统，并有案例历史描述了使用EM方法直接发现矿藏或绘制地质图的案例。大部分工作由服务公司和采矿公司完成，并在未引用的文献中进行了报道。自2008年以来，直升机时域系统的开发速度已经放慢，并且人们将更多精力用于开发自然源磁系统以及对该数据进行建模和求逆。大量研究比较了自然源方法和人工源方法的结果，得出的结论是，通常在与周围材料电导率对比弱的情况下，自然源方法可以看到大规模的地质结构，但是自然源方法可以无法看到与乡村岩石具有很大电导率对比的小特征。因此，除非人们正在寻找大型的斑岩系统，否则它们不是矿物沉积的良好检测器。

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