NONDESTRUCTIVE POROSITY DETERMINATIONS OF ANTARCTIC MARINE-SEDIMENTS DERIVED FROM RESISTIVITY MEASUREMENTS WITH AN INDUCTIVE METHOD

The fractional porosity of marine sediments is one of the fundamental index properties of rocks. For the determination of porosity a nondest ructive, inductive method was used on unsplit sediment cores. The resu lts were compared with galvanically measured resistivities using a min iature Wenner array on split cores. The measurements agree well except for cores with high clay content where measurement frequency related effects cause a resistivity difference of about 10%. Porosities were d erived from resistivities using a published resistivity-porosity relat ionship by Boyce (1968) and compared with sample porosities. A compari son of both data sets shows good agreement.