| Popis: |
Summary “Modern distributed DC/IP surveys can collect large amounts of broadband electrical data. This allows geophysicists to apply true 3D geometries which opens the door to high resolution 3D information about the spectral complex resistivity response of the earth and possibly mineral discrimination. However, these arrays also increase the computational complexity of solving the inverse problem. In addition, the increase in the frequency range of the collected data along with the complex wire paths raises the chances of incurring inductive coupling, which can hide the complex resistivity response. In this paper we present the results of a spectral induced polarization (SIP) survey completed over a prospective target in Saudi Arabia. The field SIP data were inverted using the generalized effective-medium theory of induced polarization (GEMTIP) in conjunction with an integral equation-based modeling and inversion method. These methods can replicate all inductive coupling and EM effects, which removes a significant barrier to inversion of large bandwidth spectral IP data. The results of this inversion were interpreted, and several drill holes sited. The drill holes intersected significant mineralization which is currently being further investigated. The project can be considered a technical success, validating the methods and effective-medium inversion technique used for the project.” |
