Channell, James E T (2006): Magnetic observation of ODP Site 152-919 in the Irminger Basin, North Atlantic. PANGAEA, https://doi.org/10.1594/PANGAEA.707321, Supplement to: Channell, JET (2006): Late Brunhes polarity excursions (Mono Lake, Laschamp, Iceland Basin and Pringle Falls) recorded at ODP Site 919 (Irminger Basin). Earth and Planetary Science Letters, 244(1-2), 378-393, https://doi.org/10.1016/j.epsl.2006.01.021
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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.
Latitude: 62.669950 * Longitude: -37.460283
Date/Time Start: 1993-11-13T00:00:00 * Date/Time End: 1993-11-15T00:00:00
152-919 * Latitude: 62.669950 * Longitude: -37.460283 * Date/Time Start: 1993-11-13T00:00:00 * Date/Time End: 1993-11-15T00:00:00 * Elevation: -2090.4 m * Penetration: 300.6 m * Recovery: 170.9 m * Location: Greenland Sea * Campaign: Leg152 * Basis: Joides Resolution * Device: Composite Core (COMPCORE) * Comment: 18 cores; 169.2 m cored; 0 m drilled; 101% recovery
Datasets listed in this Collection
- Channell, JET (2006): (Appendix A1) Magnetic hysteresis parameters for samples collected across polarity excursions at ODP Site 152-919. https://doi.org/10.1594/PANGAEA.707319
- Channell, JET (2006): (Appendix A2) Mean NRM/ARM ratios of ODP Site 152-919. https://doi.org/10.1594/PANGAEA.707320
- Channell, JET (2013): Magnetic record of Site 152-919. https://doi.org/10.1594/PANGAEA.808784