Delineation of sulphide ore-zones by borehole radar tomography at Hellyer Mine, Australia

Velocity and absorption tomograms are the two most common forms of presenta tion of radar tomographic data. However, mining personnel, geophysicists in cluded, are often unfamiliar with radar velocity and absorption. In this pa per, general formulae are introduced, relating velocity and attenuation coe fficient to conductivity and dielectric constant. The formulae are valid fo r lossy media as well as high-resistivity materials. The transformation of velocity and absorption to conductivity and dielectric constant is illustra ted via application of the formulae to radar tomograms from the Hellyer zin c-lead-silver mine, Tasmania, Australia. The resulting conductivity and die lectric constant tomograms constructed at Hellyer demonstrated the potentia l of radar tomography to delineate sulphide ore zones. (C) 2001 Elsevier Sc ience B.V. All rights reserved.