Magnetic observation of ODP Site 152-919 in the Irminger Basin, North Atlantic

Component natural remanent magnetizations derived from u-channel and 1-qcm discrete samples from ODP Site 919 (Irminger Basin) indicate the existence of four intervals of negative inclinations in the upper Brunhes Chronozone. According to the age model based on planktic oxygen isotope data, these “excursional” intervals occur in sediments deposited during the following time intervals: 32-34 ka, 39-41 ka, 180-188 ka and 205-225 ka. These time intervals correspond to polarity excursions detected elsewhere, known as Mono Lake, Laschamp, Iceland Basin and Pringle Falls. The isotope-based age model is supported by the normalized remanence (paleointensity) record that can be correlated to other calibrated paleointensity records for the 0–500 ka interval, such as that from ODP Site 983. For the intervals associated with the Mono Lake and Laschamp excursions, virtual geomagnetic poles (VGPs) reach equatorial latitudes and mid-southerly latitudes, respectively. For intervals associated with the Iceland Basin and Pringle Falls excursions, repeated excursions of VGPs to high southerly latitudes indicate rapid directional swings rather than a single short-lived polarity reversal. The directional instability associated with polarity excursions is not often recorded, probably due to smoothing of the sedimentary record by the process of detrital remanence (DRM) acquisition.

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Cite this as

Channell, James E T (2006). Dataset: Magnetic observation of ODP Site 152-919 in the Irminger Basin, North Atlantic. https://doi.org/10.1594/PANGAEA.707321

DOI retrieved: 2006

Additional Info

Field Value
Imported on November 29, 2024
Last update November 29, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.707321
Author Channell, James E T
Given Name James E T
Family Name Channell
Source Creation 2006
Publication Year 2006
Resource Type application/zip - filename: Channell_2006
Subject Areas
Name: Geophysics

Related Identifiers
Title: Late Brunhes polarity excursions (Mono Lake, Laschamp, Iceland Basin and Pringle Falls) recorded at ODP Site 919 (Irminger Basin)
Identifier: https://doi.org/10.1016/j.epsl.2006.01.021
Type: DOI
Relation: IsSupplementTo
Year: 2006
Source: Earth and Planetary Science Letters
Authors: Channell James E T .