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doi:10.2204/iodp.proc.327.106.2011 PaleomagnetismSeveral factors limit the usefulness of the paleomagnetic analyses at Site U1363. Hole U1363B was APC/XCB cored from the surface to just below the sediment/basalt interface at 58 mbsf, recovering a sequence of hemipelagic mud and turbidite deposits (see “Lithostratigraphy”). We did not deploy nonmagnetic core barrels because of the challenging coring conditions, and cores were not oriented. During coring, sandy layers were liquefied and redeposited in the core liner. As a result, only about two-thirds of the Hole U1363B archive-half core sections were measured. Sections were demagnetized using the superconducting cryogenic magnetometer’s AF coils at 10, 20, 30, and 40 mT steps and measured at 5 cm intervals. Cores from the remaining holes at this site were not measured because of time limitations. Figure F10 displays intensity and inclination values versus depth. Some inclination values are steep, which is typical of cores that have a coring-induced overprint (Acton et al., 2002). Scattered negative inclinations or inclinations near zero are likely caused by internal core deformation rather than representing field reversals. |
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