Figure F27. Orthogonal vector demagnetization diagrams for two samples from Hole 172-1062E illustrating the existence of a steep downward-directed drilling overprint and a smaller radial overprint. The steep overprint, which produces a strong deflection of the inclination (hollow squares), and the radial component, which produces a small deflection of the declination, are removed following about 10 to 20 mT AF demagnetization. In this example, the radial component appears to be outward directed (declination deflected toward 180°) for the reverse polarity sample (top) and to be inward directed (declination deflected toward 0°) for the normal polarity samples (bottom) (from Acton et al., 2002).

Figure F27. Orthogonal vector demagnetization diagrams for two samples from Hole 172-1062E illustrating the existence of a steep downward-directed drilling overprint and a smaller radial overprint. The steep overprint, which produces a strong deflection of the inclination (hollow squares), and the radial component, which produces a small deflection of the declination, are removed following about 10 to 20 mT AF demagnetization. In this example, the radial component appears to be outward directed (declination deflected toward 180°) for the reverse polarity sample (top) and to be inward directed (declination deflected toward 0°) for the normal polarity samples (bottom) (from Acton et al., 2002).