where Cn is the measured concentration of the examined metal in sediments; Bn is the geochemical background concentration of the metal and 1.5 is the correction factor for variation in background values due to lithogenic effects.
where Cn is the measured concentration of theexamined metal in sediments; Bn is the geochemicalbackground concentration of the metal and 1.5is the correction factor for variation in backgroundvalues due to lithogenic effects.