Fig. 5

Relations between the volume fraction of conductive sulfide minerals and rock physical parameters. Red squares represent parameters calculated using the model (Eq. 13). Each label on the marker represents the label of the corresponding sample in Table 1. Yellow asterisk plots and its bar show the average and \(\pm 1 {\text{SD}}\) parameter values for individual CCMs, denoted in legends as \(x\) and \({x}_{ave}\) for any parameters symbolized by \(x\). a Vs chargeability \(m\). Blue cross mark plots represent the average apparent (observable) chargeability calculated using the two conductivity values at maximum and minimum frequencies (\(m{\prime}\)). A dotted line represents the equation \(m=4.5{\phi }_{m}\). b Vs formation factor \(F\). c Vs relaxation time coefficient \({\rm T}.\) The blue dashed line is the linear regression line\({{\text{log}}}_{10}T=11.9{\phi }_{m}-6.00\) with \({{\text{R}}}^{2}\) = 0.78. d Vs frequency coefficient \(c\)