Van Schoor, MichaelMare, LPFourie, CJS2009-09-292009-09-292009-09Van Schoor, M., Mare, .LP. and Fourie, CJS. 2009. Comparison between time-and frequency-domain induced polarisation parameters. 11th South African Geophysical Association (SAGA) Biennial Conference and Exhibition. Swaziland, 16-18 September 2009. pp 1-59780620446020http://hdl.handle.net/10204/362111th South African Geophysical Association (SAGA) Biennial Conference and Exhibition. Swaziland, 16-18 September 2009Physical properties of rock samples from exploration or mining sites are often needed to assist in the planning of geophysical surveys or in the interpretation of geophysical results. For example, the output from a physical property study may be used in numerical model studies aimed at assessing the applicability or performance of a geophysical technique. Physical properties are also useful for constraining model parameters during processing and in the interpretation of field data. Electrical property data are often recorded in the time-domain, yielding resistivity and chargeability values; however, a frequency-domain, or even complex resistivity approach, may also be followed. The latter approach, for example, would produce resistivity magnitude and phase angle outputs. It is shown that both the commonly used standard time-domain chargeability parameters and the (single-frequency) complex resistivity phase angle parameter could produce misleading estimates of the polarisable nature of mineralised rocks and of the contrast between different rock types. It is further shown that a multi-frequency (spectral) approach can be used to avoid this pitfall; similarly, the calculation of different time-domain induced polarisation (IP) parameters, (using different definitions) may provide better insight into the polarisable nature of rock samples than a single, arbitrary chargeability value.enInduced polarisation parametersSpectral Induced polarisationPhysical prorpertyCole-cole modelSAGASouth African Geophysical AssociationRocksMinesConference PresentationVan Schoor, A. M., Mare, L., & Fourie, C. (2009). Comparison between time-and frequency-domain induced polarisation parameters. http://hdl.handle.net/10204/3621Van Schoor, Abraham M, LP Mare, and CJS Fourie. "Comparison between time-and frequency-domain induced polarisation parameters." (2009): http://hdl.handle.net/10204/3621Van Schoor AM, Mare L, Fourie C, Comparison between time-and frequency-domain induced polarisation parameters; 2009. http://hdl.handle.net/10204/3621 .TY - Conference Presentation AU - Van Schoor, Abraham M AU - Mare, LP AU - Fourie, CJS AB - Physical properties of rock samples from exploration or mining sites are often needed to assist in the planning of geophysical surveys or in the interpretation of geophysical results. For example, the output from a physical property study may be used in numerical model studies aimed at assessing the applicability or performance of a geophysical technique. Physical properties are also useful for constraining model parameters during processing and in the interpretation of field data. Electrical property data are often recorded in the time-domain, yielding resistivity and chargeability values; however, a frequency-domain, or even complex resistivity approach, may also be followed. The latter approach, for example, would produce resistivity magnitude and phase angle outputs. It is shown that both the commonly used standard time-domain chargeability parameters and the (single-frequency) complex resistivity phase angle parameter could produce misleading estimates of the polarisable nature of mineralised rocks and of the contrast between different rock types. It is further shown that a multi-frequency (spectral) approach can be used to avoid this pitfall; similarly, the calculation of different time-domain induced polarisation (IP) parameters, (using different definitions) may provide better insight into the polarisable nature of rock samples than a single, arbitrary chargeability value. DA - 2009-09 DB - ResearchSpace DP - CSIR KW - Induced polarisation parameters KW - Spectral Induced polarisation KW - Physical prorperty KW - Cole-cole model KW - SAGA KW - South African Geophysical Association KW - Rocks KW - Mines LK - https://researchspace.csir.co.za PY - 2009 SM - 9780620446020 T1 - Comparison between time-and frequency-domain induced polarisation parameters TI - Comparison between time-and frequency-domain induced polarisation parameters UR - http://hdl.handle.net/10204/3621 ER -