โ Scribed by M. Frappa; C. Molinier
No coin nor oath required. For personal study only.
The technique of seismic reflection was used to survey the mineral deposits in a copper mine exploiting the sulfide minerals galena, pyrite and chalcopyrite. This approach required the adaptation of seismic reflection techniques to the specific features of the mine, which are thin mineral-bearing layers, variable thickness of overlying strata, and innaccessible rock faces.
Field measurements were made according to a four-fold multiple coverage. After an initial survey, we were able to develop a model that allowed the evaluation of the "optimal offset" based on synthetic traces. Deconvolution considerably improved the procedure, together with the definition and the ability to determine the depth of the upper contact of the mineral deposit. Finally, the application of complex traces analysis, mainly of instantaneous amplitude, permitted us to specify the degree of continuity in the mineral horizon under survey.
๐ SIMILAR VOLUMES
Application of shallow, seismic reflection to problems associated with mineral exploration, mine planning, abandoned-mine detection and environmental evaluation has been successful in many geological settings. The increased dynamic range of recording equipment and the decreased cost of processing ha