Drilling with Confidence
Structures or ore bodies are a product of their geological environment and traditionally poor use is made of our exploration data in constructing interpretative geological models that will assist exploration decisions. The connection between ground geophysics and a geological model is done through prior experience, physicalmathematical IPResistivity modeling and expensive DDH programs. To date geologic-geophysical models developed from Induced Polarization and Apparent Resistivity obtained from geoelectric methods are created by qualitative estimations and verified by physical and mathematical modeling. These models are always limited to final qualitative estimation of geoelectric and geometric parameters.
Quantitative Section Methodology provides much better understanding of the relationship between resistivity parameter and chargeability parameter, favouring the resistivity parameter as direct indicator of structures undervalued in the interpretation of geoelectric data. The contrast in specific resistivity (the most representative resistivity of a layer unit or group layers units) and layers’ boundaries are derived from interpretation of resistivity data regardless of geoelectric array used. This is the base of the conceptual geologic-geoelectric model. When enough geological information is available, lithologic statements are made. Geologic-lithologic assumptions are assigned to geoelectric units and favourable geoelectric hosts are identified based on exploration objectives.