Downhole Magnetic Logging in Sediments during Leg 145: Usefulness and Magnetostratigraphic Interpretation of the Logs at Site 884

Abstract

Downhole magnetic logging of sediments was conducted at two sites during Ocean Drilling Program (ODP) Leg 145 in the North West Pacific Ocean. Two different tools were used: a total field magnetometer (nuclear resonance magnetometer tool) using the overhauser effect and a susceptibility magnetic tool, based on the mutual induction of two coils caused by the surrounding rock susceptibility. Both tools have been developed through a cooperation between Total, CEA-LETI (a division of the French Commissariat à 1'