Other
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009e%26psl.284..124c&link_type=abstract
Earth and Planetary Science Letters, Volume 284, Issue 1-2, p. 124-131.
Other
9
Scientific paper
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 remanent magnetization (CRM) that is partially self-reversed relative to the detrital remanent magnetization (DRM) carried by the host titanomagnetite. The partial self-reversal could have been accomplished by ionic ordering during oxidation, thereby changing the balance of the magnetic moments in the ferrimagnetic sublattices.
Channell James E. T.
Xuan Chuang
No associations
LandOfFree
Self-reversal and apparent magnetic excursions in Arctic sediments does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Self-reversal and apparent magnetic excursions in Arctic sediments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-reversal and apparent magnetic excursions in Arctic sediments will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1070955