Figure F64. Raw vertical magnetic field data for Göttingen Borehole Magnetometer (GBM) run (downlog and uplog) and comparison with vertical magnetic field measured by the General Purpose Inclinometry Tool (GPIT) in the Formation MicroScanner (FMS)-sonic tool string, Hole U1376A. Data are not corrected for tool inclination. Offsets between logs can be explained by magnetic material present in GPIT tool strings.
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