Five intervals from three sites of Transect EG66 were studied. Figure F4 presents a typical demagnetization result shown on a Zijderveld diagram. After removal of small secondary components related to viscous and/or drill-induced magnetization, the direction of the characteristic magnetic remanence is defined using standard principal component analysis (Kirschvink, 1980). Note that the azimuth of the drill cores is unknown and so only the characteristic inclination is meaningful.
Table T5 lists characteristic inclination, intensity of the natural remnant magnetization, magnetic susceptibility, and Königsberger ratio (Q ratio). Also given is the interpreted polarity together with important notes offered as a first interpretation of the paleomagnetic results.
Both intervals from Hole SEG01A, as well as the interval from nearby Hole SEG01B, exhibit normal polarity. The similar characteristic inclinations indicate that all three samples are from the same igneous cooling unit. A characteristic component could be isolated above 6–12 mT and the direction calculated using standard principal component analysis. The inclinations of this presumably primary component are 46.8°, 49.7°, and 50.0°, respectively, and are therefore of normal polarity. The two intervals from Hole SEG02A are of reversed polarity.