Spectral induced polarization: frequency domain versus time domain laboratory data

SUMMARY Spectral information obtained from induced polarization (IP) measurements can be used in a variety of applications and is often gathered frequency domain (FD) at the laboratory scale. In contrast, field IP are mostly done time (TD). Theoretically, spectral content both domains should similar. practice, they different, mainly due to instrumental restrictions as well limited range measurements. Therefore, possibility transition between domains, particular for comparison FD data TD results, would very favourable. To compare we conducted experiments FD. We started with three numerical models test circuit, followed by several investigations different wood sandstone samples. Our results demonstrate that differential polarizability (DP), which calculated decay curves, compared phase complex electrical resistivity. Thus, DP first visual data, also enables fast discrimination Furthermore, qualitatively, relaxation distribution (RTD) all data. The agreement however, depending on quality. It striking RTD better higher quality TD. Nevertheless, carried out almost equivalent results. good comparability