Component NRM directions for sediment core HLY0503-06JPC ...

• Main Authors: Channell, James E T, Xuang, Chuang
• Format: Dataset
• Language: English
• Published: PANGAEA 2013
• Subjects: Core section label; DEPTH, sediment/rock; Declination; Inclination; Maximum angular deviation; Jumbo Piston Core; HLY0503; Healy; Arctic Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.804615; https://doi.pangaea.de/10.1594/PANGAEA.804615

The Arctic oceans have been fertile ground for the recording of apparent excursions of the geomagnetic field, implying that the high latitude field had unusual characteristics at least over the last 1–2 Myrs. Alternating field demagnetization of the natural remanent magnetization (NRM) of Core HLY0503-6JPC from the Mendeleev Ridge (Arctic Ocean) implies the presence of primary magnetizations with negative inclination apparently recording excursions in sediments deposited during the Brunhes Chron. Thermal demagnetization, on the other hand, indicates the presence of multiple (often anti-parallel) magnetization components with negative inclination components having blocking temperatures predominantly, but not entirely, below ~ 350 °C. Thermo-magnetic tests, X-ray diffraction (XRD) and scanning electron microscopy (SEM) indicate that the negative inclination components are carried by titanomaghemite, presumably formed by seafloor oxidation of titanomagnetite. The titanomaghemite apparently carries a chemical ... : Supplement to: Channell, James E T; Xuang, Chuang (2009): Self-reversal and apparent magnetic excursions in Arctic sediments. Earth and Planetary Science Letters, 284(1-2), 124-131 ...