| 摘要 |
<p>A method for indicating the presence of concealed minerals and/or deposits in prospecting or exploration operations. A flow of ascending free geogas is analysed with respect to its content of entrained substances of exploration interest. The gas is suitably sampled at locations beneath or above the surface of the ground, and its content of carried substances caused to be released, and then collected and analysed. The gas may suitably be caused to flow through a device in which solid substances of interest are collected for example by absorption and/or adsorption techniques. Electrically charged particles can also be collected with the aid of an electric field.</p> |
