摘要
阐明了上置晕的术语概念，指出文献中术语运用的失当之处，归纳出以上置晕为基础的各类隐伏矿化探方法。按传统的观念，上置晕主要是由不同形式的水迁移作用造成的。地气法、ＭＦＥ法和离子晕法的出现，揭示出在覆盖层中存在着一种新的元素迁移机制，即元素以非常细小的固相微粒随地气流迁移。一系列实验和实测结果表明，这种固相微粒可能是纳米粒径的物质，它们具有类气相的性状，故可将这种迁移机制称为物质的类气相垂向迁移。这一机制可以说明按传统机制难以解释的现象，对相应化探方法的研制、改善和应用有理论和实践上的指导意义。
According to the genetic classification, the secondary halo can be divided into two categories, i.e.,the residual halo and the superimposed halo.The superimposed halo is a geochemical halo formed in the way that the elements in the concealed mineralized object have been carried to the near surface position of the overburden by an ascending migration mechanism. This paper has explained the terminological concept of the superimposed halo, and points out the inappropriate use of this term in the literatures and systematizes the various geochemical methods of exploring concealed ore deposits on the basis of superimposed halo. The superimposed halo, according to the traditional concept, is mainly generated by the various forms of water migration processes. The emergence of geogas, MFE and ionometrical methods has revealed that there is a new element migration mechanism in the overburden, i.e., the elements have migrated in the form of very fine solid particulate with the gas flow. The results of many experiments and measurements have indicated that these solid fine particulate are likely to be a nanometer size matter having quasi gas behaviour, therefore, this migration can be called as quasi gas vertical migration of matter. This mechanism can explain the phenomenon which can not be explained by the traditional mechanism. So it is of great significance both in theory and practice to the development, improvement and application of the related geochemical methods.
出处
《地学前缘》
EI
CAS
CSCD
1998年第2期185-194,共10页
Earth Science Frontiers
关键词
上置晕
掩伏矿
地气
上升迁移
地球化学勘探
superimposed halo, concealed deposits, geogas, ascending migration, mechanism
