Final Report - Geoscience BC

geophysical data. The geophysical model is then compared to reference models, 2D models ofisosurfaces of geophysical parameters that are fitted to geological maps and sections. There areseveral programs available to invert geology-geophysics into 3D images, VPmg andGeomodeller. A number of geophysical inversion codes recover geophysical rock properties tothe whole earth model. These inversions may be unconstrained or constrained relative to thegeological patterns of the reference models. In constrained inversions the rock property data iskrigged to fit the geological boundary constraints. The inversion models give guidance on whatgeophysical parameters have sufficient magnitude and contrast such that a geophysical surveywould reveal drill targets.At early stages of exploration it is useful to construct synthetic forward models and inversionsbased on known geophysical surveys and rock property measurements. If these models suggestthat the ore type target could be detected geophysically, this exercise would provide rationale tofund new geophysical surveys and rock property measurements.2